CVE-2026-74628
Kernel x25 timer use-after-free allowing kernel memory corruption.
Is CVE-2026-74628 being exploited?
Not confirmed. CVE-2026-74628 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.50% probability of exploitation in the next 30 days.
How severe is CVE-2026-74628?
CVE-2026-74628 is rated Critical with a CVSS score of 9.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-74628?
Yes. A fix has been recorded for CVE-2026-74628. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-74628 affect?
CVE-2026-74628 affects Linux kernel (x25 subsystem), Systems with x25 enabled, Embedded devices using X.25. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-74628?
Apply vendor kernel update and reboot systems with x25 enabled ASAP
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Use-after-free in x25 timers causes kernel memory corruption, leading to crashes, possible local privilege escalation or remote code execution.
Immediate action required
- affected>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and < ba925a2e98ce967a0e71c5bcbcf5dbd3facaf0c8
- affected>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and < 6b79659590f0f82a9b8efd2ffd55ec6399ebfc33
- affected>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and < fdd9ac50b9b61ef2b2d52c5156aff788be91454d
- affected>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and < 1fc9f6d2c7c9fdb341bfe8ca449c990632299ea6
- affected>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and < 3c4919be5d910db4beebca420953858606fba7d8
- affected>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and < 4bc522b33438fefc3272840ae5988771863a4f1f
- affected>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and < e92c7e2b41d1528a830bc64c5e4e46dfa8133dda
- affected>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and < 2195424c3da2ef1829a63b807e3a900a90e57d85
- affected2.6.12
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.