CVE-2026-72492
Linux kernel ksmbd use-after-free in same_client_has_lease() allowing kernel memory corruption.
Is CVE-2026-72492 being exploited?
Not confirmed. CVE-2026-72492 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 0.48% probability of exploitation in the next 30 days.
How severe is CVE-2026-72492?
CVE-2026-72492 is rated High with a CVSS score of 8.8. 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-2026-72492?
Yes. A fix has been recorded for CVE-2026-72492. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-72492 affect?
CVE-2026-72492 affects Linux kernel (ksmbd SMB server). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-72492?
Apply kernel updates with ksmbd fix and restart SMB services; monitor for anomalous SMB activity.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote SMB client can trigger a kernel use-after-free, enabling crashes and potential privilege escalation or remote code execution.
Patch when possible
- affected>= e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 and < aaa3bb2bbf2ccbfea9e4e0b9dabf3afc60b50cd0
- affected>= e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 and < 09634cd055d9bd8dd167995ea52bcd8028dd5dac
- affected>= e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 and < 7c3264d273d524aa6adcce23c01087271f13586f
- affected>= e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 and < 79c7c59bb519db6f5a2a151965e825ec725614cc
- affected>= e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 and < 35d3d6ff2bc1e7aaecb15d5377ebbd6227acae0d
- affected>= e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 and < 0ff82a9cf9312678d8bc4edeef0b6e82659ac12a
- affected>= e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 and < 65b655f65c3ca1ab5d598d3832bb0ff531725858
- affected5.15
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.