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CVE-2025-10263

CRITICAL 9.1 ALL-YEARS

Published 2026-06-09 · Last modified 2026-09-04 · Arm · NVD: Awaiting Analysis

Arm C1-Ultra, C1-Premium, Neoverse V3 & V3AE, Neoverse V2, Neoverse V1, Neoverse-N2, Neoverse-N1, Cortex-X925, Cortex-X4, Cortex-X3, Cortex-X2, Cortex-X1 & X1C, Cortex-A710, Cortex-A78, A78AE & A78C, Cortex-A77, Cortex-A76 & A76A may allow writes to resources owned by a higher exception level.

ELEVATED IMPACT

Severe if exploited (CVSS 9.1), but no confirmed exploitation. Patch on a normal cadence.

Exploitation likelihood

0.5%chance of exploitation in 30 days · 45th percentile

○ In CISA KEV○ Catalogued PoC◆ SSVC: exploitation none, automatable yes

Impact if exploited

9.1CVSS 3.1 · CRITICAL · ADP

  • ConfidentialityHigh
  • IntegrityHigh
  • AvailabilityNone

What an attacker needs

  • ✓Access: Reachable over the network — no local access needed
  • ✓Privileges: No account or privileges required
  • ✓User interaction: No user interaction needed
  • ✓Complexity: No special conditions — reliably repeatable

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

Search for new PoCs

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Tracked sources are checked weekly for the full archive, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Affected

Vendors Arm Red Hat

Products C1 Ultra C1 Premium Neoverse V3 Neoverse V3ae Neoverse V1 Neoverse N2 Neoverse N1 Cortex X925 Cortex X4 Cortex X3 Cortex X2 Cortex X1 Cortex X1c Cortex A710 Cortex A78 Cortex A78ae Cortex A78c Cortex A77 Cortex A76 Cortex A76ae Red Hat Enterprise Linux 10 Red Hat Enterprise Linux 10.0 Extended Update Support Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Red Hat Enterprise Linux 8.4 Extended Update Support Long Life Add On Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Red Hat Enterprise Linux 8.6 Extended Update Support Long Life Add On Red Hat Enterprise Linux 8.8 Telecommunications Update Service Red Hat Enterprise Linux 8.8 Update Services For Sap Solutions Red Hat Enterprise Linux 9 Red Hat Enterprise Linux 9.2 Update Services For Sap Solutions Red Hat Enterprise Linux 9.4 Update Services For Sap Solutions Red Hat Enterprise Linux 9.6 Extended Update Support Red Hat Openshift Container Platform 4.12 Red Hat Openshift Container Platform 4.13 Red Hat Openshift Container Platform 4.14 Red Hat Openshift Container Platform 4.15 Red Hat Openshift Container Platform 4.16 Red Hat Openshift Container Platform 4.17 Red Hat Openshift Container Platform 4.18

Weakness (CWE)

  • CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
  • CWE-266: Incorrect Privilege Assignment

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

References and research data (JSON)

Vendor product assessments

Showing 32 of 2084 vendor product statements; 2052 omitted. Read the full vendor advisory.

  • rhcos-x86_64-412.86.202608080425-0 as a component of Red Hat OpenShift Container Platform 4.12 · fixed

    Vendor assessment for this product only.

    pkg:generic/redhat/[email protected]?arch=x86_64

    • vendor fix: For OpenShift Container Platform 4.12 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this asynchronous errata update: https://docs.redhat.com/en/documentation/openshift_container_platform/4.12/html/release_notes You may download the oc tool and use it to inspect release image metadata for x86_64 architecture. The image digest may be found at https://quay.io/repository/openshift-release-dev/ocp-release?tab=tags. The sha value for the release is as follows: (For x86_64 architecture) The image digest is sha256:fc0a3dd609a60dd4ad10fe4badef3058d61a1a33436d33ec4b563d5aaf9f26cc All OpenShift Container Platform 4.12 users are advised to upgrade to these updated packages and images when they are available in the appropriate release channel. To check for available updates, use the OpenShift CLI (oc) or web console. Instructions for upgrading a cluster are available at https://docs.redhat.com/en/documentation/openshift_container_platform/4.12/html-single/updating_clusters/index#updating-cluster-within-minor. Vendor guidance
    Red Hat · CVE-2025-10263 · Updated 2026-10-09T01:03:35+00:00
  • kernel-debug-debuginfo-0:5.14.0-284.186.1.el9_2.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.2) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_2?arch=s390x

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect. Red Hat recommends treating all kernel errata as security-relevant. Given the kernel's fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers' overall security posture. Because of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat's CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available. Vendor guidance
    Red Hat · CVE-2025-10263 · Updated 2026-10-09T01:03:35+00:00
  • kernel-64k-debug-devel-0:5.14.0-687.22.1.el9_8.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_8?arch=aarch64

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect. Vendor guidance
    Red Hat · CVE-2025-10263 · Updated 2026-10-09T01:03:35+00:00
  • kernel-core-0:6.12.0-211.30.1.el10_2.x86_64 as a component of Red Hat Enterprise Linux BaseOS (v. 10) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_2?arch=x86_64

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect. Vendor guidance
    Red Hat · CVE-2025-10263 · Updated 2026-10-09T01:03:35+00:00
  • kernel-modules-extra-0:4.18.0-305.200.1.el8_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.4) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_4?arch=x86_64

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect. Red Hat recommends treating all kernel errata as security-relevant. Given the kernel's fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers' overall security posture. Because of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat's CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available. Vendor guidance
    Red Hat · CVE-2025-10263 · Updated 2026-10-09T01:03:35+00:00
  • kernel-debug-modules-core-0:5.14.0-284.186.1.el9_2.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.2) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_2?arch=aarch64

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect. Red Hat recommends treating all kernel errata as security-relevant. Given the kernel's fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers' overall security posture. Because of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat's CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available. Vendor guidance
    Red Hat · CVE-2025-10263 · Updated 2026-10-09T01:03:35+00:00
  • kernel-debug-debuginfo-0:5.14.0-570.131.1.el9_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS EUS (v.9.6) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_6?arch=aarch64

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect. Red Hat recommends treating all kernel errata as security-relevant. Given the kernel's fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers' overall security posture. Because of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat's CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available. Vendor guidance
    Red Hat · CVE-2025-10263 · Updated 2026-10-09T01:03:35+00:00
  • kernel-tools-libs-devel-0:6.12.0-55.98.1.el10_0.aarch64 as a component of Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_0?arch=aarch64

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect. Red Hat recommends treating all kernel errata as security-relevant. Given the kernel's fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers' overall security posture. Because of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat's CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available. Vendor guidance
    Red Hat · CVE-2025-10263 · Updated 2026-10-09T01:03:35+00:00
  • kernel-rt-0:6.12.0-211.30.1.el10_2.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV (v. 10) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_2?arch=x86_64

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect. Vendor guidance
    Red Hat · CVE-2025-10263 · Updated 2026-10-09T01:03:35+00:00
  • kernel-rt-64k-modules-extra-0:6.12.0-211.30.1.el10_2.aarch64 as a component of Red Hat Enterprise Linux Real Time (v. 10) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_2?arch=aarch64

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect. Vendor guidance
    Red Hat · CVE-2025-10263 · Updated 2026-10-09T01:03:35+00:00
  • python3-perf-debuginfo-0:5.14.0-687.22.1.el9_8.x86_64 as a component of Red Hat Enterprise Linux Real Time (v. 9) · fixed

    Vendor assessment for this product only.

    pkg:rpm/redhat/[email protected]_8?arch=x86_64

    • vendor fix: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect. Vendor guidance
    Red Hat · CVE-2025-10263 · Updated 2026-10-09T01:03:35+00:00
  • kernel-rt as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-rt

    • none available: Fix deferred
    Red Hat · CVE-2025-10263 · Updated 2026-10-09T01:03:35+00:00
  • kernel-rt-debug as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-rt-debug

    • none available: Fix deferred
    Red Hat · CVE-2025-10263 · Updated 2026-10-09T01:03:35+00:00
  • kernel-rt-debug-devel as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-rt-debug-devel

    • none available: Fix deferred
    Red Hat · CVE-2025-10263 · Updated 2026-10-09T01:03:35+00:00
  • kernel-rt-debug-modules as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-rt-debug-modules

    • none available: Fix deferred
    Red Hat · CVE-2025-10263 · Updated 2026-10-09T01:03:35+00:00
  • kernel-rt-debug-modules-extra as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-rt-debug-modules-extra

    • none available: Fix deferred
    Red Hat · CVE-2025-10263 · Updated 2026-10-09T01:03:35+00:00
  • kernel-rt-debug-modules-partner as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-rt-debug-modules-partner

    • none available: Fix deferred
    Red Hat · CVE-2025-10263 · Updated 2026-10-09T01:03:35+00:00
  • kernel-rt-devel-matched as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-rt-devel-matched

    • none available: Fix deferred
    Red Hat · CVE-2025-10263 · Updated 2026-10-09T01:03:35+00:00
  • kernel-rt-modules as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-rt-modules

    • none available: Fix deferred
    Red Hat · CVE-2025-10263 · Updated 2026-10-09T01:03:35+00:00
  • kernel-rt-modules-internal as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-rt-modules-internal

    • none available: Fix deferred
    Red Hat · CVE-2025-10263 · Updated 2026-10-09T01:03:35+00:00
  • kernel-rt-selftests-internal as a component of Red Hat Enterprise Linux 9 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel-rt-selftests-internal

    • none available: Fix deferred
    Red Hat · CVE-2025-10263 · Updated 2026-10-09T01:03:35+00:00
  • kernel.src as a component of Red Hat Enterprise Linux for NVIDIA 26 · known affected

    Vendor assessment for this product only.

    pkg:rpm/redhat/kernel?arch=src

    • no fix planned: Will not fix
    Red Hat · CVE-2025-10263 · Updated 2026-10-09T01:03:35+00:00
  • libkrun.src as a component of Red Hat Enterprise Linux 10 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/libkrun?arch=src

    Red Hat · CVE-2025-10263 · Updated 2026-10-09T01:03:35+00:00
  • kernel-debug-devel as a component of Red Hat Enterprise Linux 6 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-debug-devel

    Red Hat · CVE-2025-10263 · Updated 2026-10-09T01:03:35+00:00
  • kernel-headers as a component of Red Hat Enterprise Linux 6 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-headers

    Red Hat · CVE-2025-10263 · Updated 2026-10-09T01:03:35+00:00
  • python-perf as a component of Red Hat Enterprise Linux 6 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/python-perf

    Red Hat · CVE-2025-10263 · Updated 2026-10-09T01:03:35+00:00
  • kernel-debug as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-debug

    Red Hat · CVE-2025-10263 · Updated 2026-10-09T01:03:35+00:00
  • kernel-headers as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-headers

    Red Hat · CVE-2025-10263 · Updated 2026-10-09T01:03:35+00:00
  • kernel-rt-debug-devel as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-rt-debug-devel

    Red Hat · CVE-2025-10263 · Updated 2026-10-09T01:03:35+00:00
  • kernel-rt-trace as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-rt-trace

    Red Hat · CVE-2025-10263 · Updated 2026-10-09T01:03:35+00:00
  • kernel-tools as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/kernel-tools

    Red Hat · CVE-2025-10263 · Updated 2026-10-09T01:03:35+00:00
  • python-perf as a component of Red Hat Enterprise Linux 7 · known not affected

    Vendor assessment for this product only.

    Reason: vulnerable code not present

    pkg:rpm/redhat/python-perf

    Red Hat · CVE-2025-10263 · Updated 2026-10-09T01:03:35+00:00

Unverified PoC candidates

Catalogue matches for further research. These repositories have not been validated as working exploits.

1 candidate

All CVSS metrics

  • CRITICAL 9.1 v3.1 · ADP Primary
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
  • HIGH 8.4 v3.1 · ADP Primary
    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
  • CRITICAL 9.1 v3.1 · NVD Secondary
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
  • HIGH 8.4 v3.1 · NVD Secondary
    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

References

Advisories

Technical & other

Sources: NVD · CVE.org · All sources and attribution · EPSS