CVE-2026-98228
HIGH 7.8In the Linux kernel, the following vulnerability has been resolved: mips: select CONFIG_WEAK_REORDERING_BEYOND_LLSC from CONFIG_EYEQ On I6500 CPU cores, lld and scd give no ordering guarantees (same as all other instructions). To respect the assumption that arch_cmpxchg() is fully ordered, we must inject sync instructions above and below our lld/scd loops using the already in place WEAK_REORDERING_BEYOND_LLSC infrastructure. Otherwise, bad things can happen: [ 34.054496] CPU 3 Unable to handle kernel paging request at virtual address 0000000000000000, epc == a80000080838e01c, ra == a80000080838dfc4 [ 34.054559] Oops[#1]: [ 34.069561] CPU: 3 UID: 0 PID: 170 Comm: pipe_race Not tainted 7.2.0-rc6-01553-gb73c35220968-dirty #103 VOLUNTARY [ 34.079932] Hardware name: Mobile EyeQ5 MP5 Evaluation board [ 34.085592] $ 0 : 0000000000000000 0000000000000001 0000000000000000 0000000000000000 [ 34.093616] $ 4 : a800000808ee2618 000000000b7a879d 0000000000001000 0000000000000000 [ 34.101638] $ 8 : 0000000000e3f2c9 0000000000000000 a800000808a2a9f8 0000000000000000 [ 34.109660] $12 : a8000008139ffcd8 ffffffff84080018 a80000080837fae0 7878787878787878 [ 34.117682] $16 : a800000807e82940 0000000000001000 0000000000000000 0000000000000000 [ 34.125704] $20 : a800000802920e00 a8000008139ffdf8 a800000802649400 0000000000e3f2c9 [ 34.133726] $24 : 0000000000000006 00000001200406e0 [ 34.141783] $28 : a8000008139fc000 a8000008139ffd10 0000000000e3f2c8 a80000080838dfc4 [ 34.149837] epc : a80000080838e01c anon_pipe_read+0xd4/0x428 [ 34.155697] ra : a80000080838dfc4 anon_pipe_read+0x7c/0x428 [ 34.161549] Status: 140000e3 KX SX UX KERNEL EXL IE [ 34.166551] Cause : 40800408 (ExcCode 02) [ 34.170574] BadVA : 0000000000000000 [ 34.174161] PrId : 0001b028 (MIPS I6500) [ 34.178183] Process pipe_race (pid: 170, threadinfo=000000005ca35720, task=00000000e1013890, tls=000000014ebbb780) [ 34.188568] Stack : a800000802649400 0000000000000000 0000000000000000 a8000008139ffdd0 [ 34.196623] 0000000000000fba a800000808ee0000 0000000000000001 a8000008130c3e80 [ 34.204676] a8000008080d1280 a8000008139ffd58 a8000008139ffd58 1dbd2b22ea1dd500 [ 34.212729] a800000802649400 a800000808ee0000 ffffffffffffffea 0000000000000001 [ 34.220783] 0000000000001000 0000000000000000 00000001200ae518 ffffffffffffffff [ 34.228836] 000000fffbe0e530 a80000080837edf4 000000fffbe0e530 0000000000000000 [ 34.236890] 0000000000000000 0000000000000000 000000014ebb55a0 0000000000001000 [ 34.244943] 0000000000000001 a800000802649400 0000000000000000 0000000000000000 [ 34.252996] 0000000000000000 0000400400000000 0000000000000000 1dbd2b22ea1dd500 [ 34.261049] 00000000140000e3 a800000802649400 a800000802649400 a800000808ee0000 [ 34.269103] ... [ 34.271568] Call Trace: [ 34.274026] [<a80000080838e01c>] anon_pipe_read+0xd4/0x428 [ 34.279533] [<a80000080837edf4>] vfs_read+0x25c/0x318 [ 34.284607] [<a80000080837faac>] ksys_read+0x104/0x138 [ 34.289763] [<a80000080802b9cc>] syscall_common+0x44/0x68 [ 34.295187] [ 34.296689] Code: f84000cf 02209825 de020010 <dc420000> d8400004 02002825 0040f809 02802025 f84000c3 [ 34.306504] [ 34.308099] ---[ end trace 0000000000000000 ]--- My initial reproducer was the xdp-tools test suite. A standalone reproducer would be an lld/scd loop that, when the read is reordered by the CPU, triggers a fault. We can achieve this from userspace by stressing an anonymous pipe, which uses a mutex. Program used: // SPDX-License-Identifier: GPL-2.0 // pipe_race.c - reproducer for MIPS LL/SC reordering vs fs/pipe.c // // Two userspace processes on an anonymous pipe: // parent = writer: tight write() loop // child = reader: tight read() loop #define _GNU_SOURCE #include <assert.h> #include <errno.h> #include <sched.h> #include <signal.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/types.h> #include ---truncated---
Severe if exploited (CVSS 7.8), but no known exploitation and low modeled probability. Patch on a normal cadence.
Exploitation likelihood
0.1%chance of exploitation in 30 days · 2nd percentile
Impact if exploited
7.8CVSS 3.1 · HIGH
- ConfidentialityHigh
- IntegrityHigh
- AvailabilityHigh
What an attacker needs
- ⚠Access: Requires local access to the host
- ⚠Privileges: Requires a low-privilege account
- ✓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
Search GitHub now — results may be empty or unverified.
Tracked sources are checked daily for recent CVEs, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.
Data snapshot:
Weakness (CWE)
Not classified.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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 not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/kernel
Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+00:00kernel-64k-debug-modules-extra 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/kernel-64k-debug-modules-extra
Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+00:00kernel-debug-core 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/kernel-debug-core
Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+00:00kernel-doc 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/kernel-doc
Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+00:00kernel-rt-64k-debug 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/kernel-rt-64k-debug
Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+00:00kernel-rt-64k-modules-extra 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/kernel-rt-64k-modules-extra
Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+00:00kernel-rt-debug-modules-extra 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/kernel-rt-debug-modules-extra
Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+00:00kernel-uki-virt 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/kernel-uki-virt
Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+00:00kernel.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/kernel?arch=src
Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+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-2026-98228 · Updated 2026-10-09T16:42:41+00:00perf 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/perf
Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+00:00kernel-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-doc
Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+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-2026-98228 · Updated 2026-10-09T16:42:41+00:00kernel.src 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?arch=src
Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+00:00kernel-debug as a component of Red Hat Enterprise Linux 8 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/kernel-debug
Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+00:00kernel-ipaclones-internal as a component of Red Hat Enterprise Linux 8 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/kernel-ipaclones-internal
Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+00:00kernel-rt-debug-devel as a component of Red Hat Enterprise Linux 8 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/kernel-rt-debug-devel
Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+00:00kernel-rt-modules-internal as a component of Red Hat Enterprise Linux 8 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/kernel-rt-modules-internal
Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+00:00kernel-zfcpdump-devel as a component of Red Hat Enterprise Linux 8 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/kernel-zfcpdump-devel
Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+00:00kernel-64k as a component of Red Hat Enterprise Linux 9 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/kernel-64k
Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+00:00kernel-64k-debug-modules-internal as a component of Red Hat Enterprise Linux 9 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/kernel-64k-debug-modules-internal
Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+00:00kernel-abi-stablelists as a component of Red Hat Enterprise Linux 9 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/kernel-abi-stablelists
Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+00:00kernel-debug-modules-extra as a component of Red Hat Enterprise Linux 9 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/kernel-debug-modules-extra
Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+00:00kernel-ipaclones-internal as a component of Red Hat Enterprise Linux 9 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/kernel-ipaclones-internal
Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+00:00kernel-rt-64k-debug as a component of Red Hat Enterprise Linux 9 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/kernel-rt-64k-debug
Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+00:00kernel-rt-64k-debug-modules-partner as a component of Red Hat Enterprise Linux 9 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/kernel-rt-64k-debug-modules-partner
Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+00:00kernel-rt-64k-modules-partner as a component of Red Hat Enterprise Linux 9 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/kernel-rt-64k-modules-partner
Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+00:00kernel-rt-debug-modules-extra as a component of Red Hat Enterprise Linux 9 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/kernel-rt-debug-modules-extra
Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+00:00kernel-rt-modules-internal as a component of Red Hat Enterprise Linux 9 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/kernel-rt-modules-internal
Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+00:00kernel-uki-virt-addons as a component of Red Hat Enterprise Linux 9 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/kernel-uki-virt-addons
Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+00:00kernel-zfcpdump-modules-partner as a component of Red Hat Enterprise Linux 9 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:rpm/redhat/kernel-zfcpdump-modules-partner
Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+00:00openshift/ose-rhel-coreos-9 as a component of Red Hat OpenShift Container Platform 4 · known not affected
Vendor assessment for this product only.
Reason: vulnerable code not present
pkg:oci/ose-rhel-coreos-9?repository_url=registry.redhat.io/openshift/ose-rhel-coreos-9
Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+00:00
All CVSS metrics
- HIGH 7.8 v3.1 · CNA Primary
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - HIGH 7.8 v3.1 · NVD Secondary
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
Advisories
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98228.json Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+00:00
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-93156 EUVD · EUVD-2026-93156
Technical & other
- https://git.kernel.org/stable/c/3f017c2ca8c31a1e135dd87be647096866d6b196CVE record · Linux · Updated 2026-10-19T09:15:59.955Z
NVD · CVE-2026-98228 · Updated 2026-10-19T10:18:23.530 - https://git.kernel.org/stable/c/bbc448c541ed90d52f9ec22f17394304e3bf170eCVE record · Linux · Updated 2026-10-19T09:15:59.955Z
NVD · CVE-2026-98228 · Updated 2026-10-19T10:18:23.530 - https://access.redhat.com/security/cve/CVE-2026-98228 Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+00:00
- https://bugzilla.redhat.com/show_bug.cgi?id=2546364 Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+00:00
- https://www.cve.org/CVERecord?id=CVE-2026-98228 Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+00:00
- https://nvd.nist.gov/vuln/detail/CVE-2026-98228 Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+00:00
- https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98228.mbox Red Hat · CVE-2026-98228 · Updated 2026-10-09T16:42:41+00:00