CVE-2026-72492ksmbd: fix use-after-free in same_client_has_lease()
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in same_client_has_lease() same_client_has_lease() returns an opinfo pointer from ci->m_op_list after dropping ci->m_lock without taking a reference. smb_grant_oplock() then dereferences that pointer in copy_lease() and when checking breaking_cnt. A concurrent close can remove the old lease from ci->m_op_list and drop the last reference before the caller uses the returned pointer, leading to a use-after-free. Take a reference when same_client_has_lease() selects an existing lease, drop any previous match while scanning, and release the returned reference in smb_grant_oplock() after copying the lease state.
- CVSS
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Aug 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 before aaa3bb2bbf2ccbfea9e4e0b9dabf3afc60b50cd0; from e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 before 09634cd055d9bd8dd167995ea52bcd8028dd5dac; from e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 before 7c3264d273d524aa6adcce23c01087271f13586f; from e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 before 79c7c59bb519db6f5a2a151965e825ec725614cc; from e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 before 35d3d6ff2bc1e7aaecb15d5377ebbd6227acae0d; from e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 before 0ff82a9cf9312678d8bc4edeef0b6e82659ac12a; from e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 before 65b655f65c3ca1ab5d598d3832bb0ff531725858 | CNA record |
References
- https://git.kernel.org/stable/c/aaa3bb2bbf2ccbfea9e4e0b9dabf3afc60b50cd0
- https://git.kernel.org/stable/c/09634cd055d9bd8dd167995ea52bcd8028dd5dac
- https://git.kernel.org/stable/c/7c3264d273d524aa6adcce23c01087271f13586f
- https://git.kernel.org/stable/c/79c7c59bb519db6f5a2a151965e825ec725614cc
- https://git.kernel.org/stable/c/35d3d6ff2bc1e7aaecb15d5377ebbd6227acae0d
- https://git.kernel.org/stable/c/0ff82a9cf9312678d8bc4edeef0b6e82659ac12a
- https://git.kernel.org/stable/c/65b655f65c3ca1ab5d598d3832bb0ff531725858
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.