CVE-2026-72492

CVE CVE-2026-72492EUVD EUVD-2026-59391Published 2026-08-15T05:57:26.000ZLast changed 2026-08-17T05:44:53.000ZCVSS 8.8

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 6.1.178; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <7c3264d273d524aa6adcce23c01087271f13586f; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <09634cd055d9bd8dd167995ea52bcd8028dd5dac; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <0ff82a9cf9312678d8bc4edeef0b6e82659ac12a; patch: 7.2; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <79c7c59bb519db6f5a2a151965e825ec725614cc; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <aaa3bb2bbf2ccbfea9e4e0b9dabf3afc60b50cd0; 5.15; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <35d3d6ff2bc1e7aaecb15d5377ebbd6227acae0d; patch: 5.15.212; e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <65b655f65c3ca1ab5d598d3832bb0ff531725858; patch: 6.12.97; patch: 0; patch: 6.18.40; patch: 7.1.5; patch: 6.6.145

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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