CVE-2026-93264
N/AIn the Linux kernel, the following vulnerability has been resolved: RDMA/efa: Fix PBL chunk length computation On register MR, when creating the PBL, if it's an indirect PBL we create a chunk list to hold the PBL pages pointers. Each chunk is 4KB in size and can hold 510 addresses (EFA_PTRS_PER_CHUNK) and has a 12-byte control buffer at the end of it holding the next chunk's pointer and its length. If the PBL number of pages is a multiple of EFA_PTRS_PER_CHUNK, the calculated last chunk length is wrongly computed as 0, even though that chunk is fully populated with 510 real page pointers. This wrong length is used both to DMA map the chunk and is propagated to the device, causing the device to see the chunk as empty and reject the memory registration. Fix the calculation so it will be performed only if the number of pages isn't a multiple of EFA_PTRS_PER_CHUNK, if it is, its already handled in the above loop correctly. Also prevent out-of-bounds reach in the chunks array in such scenario.
No known exploitation, public exploit, or elevated probability at this time. Track for changes.
Exploitation likelihood
0.2%chance of exploitation in 30 days · 10th percentile
Impact if exploited
—CVSS · not scored
- No impact metrics
Proof of concept
No public PoC is currently catalogued.
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References and research data (JSON)
Vendor product assessments
Showing 32 of 277 vendor product statements; 245 omitted. Read the full vendor advisory.
kernel as a component of Red Hat Enterprise Linux 10 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/kernel
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
- none available: Fix deferred
kernel-core as a component of Red Hat Enterprise Linux 10 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/kernel-core
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
- none available: Fix deferred
kernel-modules-extra-matched as a component of Red Hat Enterprise Linux 10 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/kernel-modules-extra-matched
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
- none available: Fix deferred
kernel-rt-debug as a component of Red Hat Enterprise Linux 10 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/kernel-rt-debug
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
- none available: Fix deferred
kernel-uki-virt as a component of Red Hat Enterprise Linux 10 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/kernel-uki-virt
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
- none available: Fix deferred
kernel as a component of Red Hat Enterprise Linux 8 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/kernel
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
- none available: Fix deferred
kernel-modules-extra as a component of Red Hat Enterprise Linux 8 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/kernel-modules-extra
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
- none available: Fix deferred
kernel-rt-modules-internal as a component of Red Hat Enterprise Linux 8 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/kernel-rt-modules-internal
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
- none available: Fix deferred
bpftool as a component of Red Hat Enterprise Linux 9 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/bpftool
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
- none available: Fix deferred
kernel-64k-modules as a component of Red Hat Enterprise Linux 9 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/kernel-64k-modules
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
- none available: Fix deferred
kernel-debug-modules-partner as a component of Red Hat Enterprise Linux 9 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/kernel-debug-modules-partner
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
- none available: Fix deferred
kernel-rt-64k-debug as a component of Red Hat Enterprise Linux 9 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/kernel-rt-64k-debug
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
- none available: Fix deferred
kernel-rt-64k-modules-extra as a component of Red Hat Enterprise Linux 9 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/kernel-rt-64k-modules-extra
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
- none available: Fix deferred
kernel-rt-kvm as a component of Red Hat Enterprise Linux 9 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/kernel-rt-kvm
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
- none available: Fix deferred
kernel-zfcpdump-core as a component of Red Hat Enterprise Linux 9 · known affected
Vendor assessment for this product only.
pkg:rpm/redhat/kernel-zfcpdump-core
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
- none available: Fix deferred
openshift/ose-rhel-coreos-9 as a component of Red Hat OpenShift Container Platform 4 · known affected
Vendor assessment for this product only.
pkg:oci/ose-rhel-coreos-9?repository_url=registry.redhat.io/openshift/ose-rhel-coreos-9
- workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
- none available: Fix deferred
kernel 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
Red Hat · CVE-2026-93264 · Updated 2026-10-17T21:36:44+00:00kernel-debug 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
Red Hat · CVE-2026-93264 · Updated 2026-10-17T21:36:44+00:00kernel-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-devel
Red Hat · CVE-2026-93264 · Updated 2026-10-17T21:36:44+00:00kernel-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-2026-93264 · Updated 2026-10-17T21:36:44+00:00kernel.src 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?arch=src
Red Hat · CVE-2026-93264 · Updated 2026-10-17T21:36:44+00:00bpftool 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/bpftool
Red Hat · CVE-2026-93264 · Updated 2026-10-17T21:36:44+00:00kernel-abi-whitelists 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-abi-whitelists
Red Hat · CVE-2026-93264 · Updated 2026-10-17T21:36:44+00:00kernel-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-debug-devel
Red Hat · CVE-2026-93264 · Updated 2026-10-17T21:36:44+00:00kernel-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-2026-93264 · Updated 2026-10-17T21:36:44+00:00kernel-rt 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
Red Hat · CVE-2026-93264 · Updated 2026-10-17T21:36:44+00:00kernel-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-2026-93264 · Updated 2026-10-17T21:36:44+00:00kernel-rt-doc 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-doc
Red Hat · CVE-2026-93264 · Updated 2026-10-17T21:36:44+00:00kernel-rt-trace-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-trace-devel
Red Hat · CVE-2026-93264 · Updated 2026-10-17T21:36:44+00:00kernel-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-2026-93264 · Updated 2026-10-17T21:36:44+00:00kernel-tools-libs-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-tools-libs-devel
Red Hat · CVE-2026-93264 · Updated 2026-10-17T21:36:44+00:00python-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-2026-93264 · Updated 2026-10-17T21:36:44+00:00
References
Advisories
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93264.json Red Hat · CVE-2026-93264 · Updated 2026-10-17T21:36:44+00:00
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-86136 EUVD · EUVD-2026-86136
Technical & other
- https://git.kernel.org/stable/c/665cd418b8561a099c3854443f8ad8ae751b72a0CVE record · Linux · Updated 2026-10-19T09:08:17.409Z
NVD · CVE-2026-93264 · Updated 2026-10-19T10:17:17.760 - https://git.kernel.org/stable/c/932e5684906a090644a9061fae2d254041c3b8f2CVE record · Linux · Updated 2026-10-19T09:08:17.409Z
NVD · CVE-2026-93264 · Updated 2026-10-19T10:17:17.760 - https://git.kernel.org/stable/c/489b28f2377afa70c18c45b06a6387f3d39bb123CVE record · Linux · Updated 2026-10-19T09:08:17.409Z
NVD · CVE-2026-93264 · Updated 2026-10-19T10:17:17.760 - https://git.kernel.org/stable/c/aadf3f9b5edb7f0a77e9172b237d2e07c754829cCVE record · Linux · Updated 2026-10-19T09:08:17.409Z
NVD · CVE-2026-93264 · Updated 2026-10-19T10:17:17.760 - https://git.kernel.org/stable/c/3982714e15512b83115897806dacc94899683420CVE record · Linux · Updated 2026-10-19T09:08:17.409Z
NVD · CVE-2026-93264 · Updated 2026-10-19T10:17:17.760 - https://git.kernel.org/stable/c/da7805f0211af19968584e621074f253ac07dba7CVE record · Linux · Updated 2026-10-19T09:08:17.409Z
NVD · CVE-2026-93264 · Updated 2026-10-19T10:17:17.760 - https://git.kernel.org/stable/c/1d4b5902773475fc97151379b7e5f09cad0fa57bCVE record · Linux · Updated 2026-10-19T09:08:17.409Z
NVD · CVE-2026-93264 · Updated 2026-10-19T10:17:17.760 - https://git.kernel.org/stable/c/229b42d7450c1cf96f45ec39ebb69211b06bc036CVE record · Linux · Updated 2026-10-19T09:08:17.409Z
NVD · CVE-2026-93264 · Updated 2026-10-19T10:17:17.760 - https://access.redhat.com/security/cve/CVE-2026-93264 Red Hat · CVE-2026-93264 · Updated 2026-10-17T21:36:44+00:00
- https://bugzilla.redhat.com/show_bug.cgi?id=2540367 Red Hat · CVE-2026-93264 · Updated 2026-10-17T21:36:44+00:00
- https://www.cve.org/CVERecord?id=CVE-2026-93264 Red Hat · CVE-2026-93264 · Updated 2026-10-17T21:36:44+00:00
- https://nvd.nist.gov/vuln/detail/CVE-2026-93264 Red Hat · CVE-2026-93264 · Updated 2026-10-17T21:36:44+00:00
- https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-93264.mbox Red Hat · CVE-2026-93264 · Updated 2026-10-17T21:36:44+00:00