CVE-2026-90038

CVE CVE-2026-90038EUVD EUVD-2026-80646Published 2026-09-16T10:33:37.000ZLast changed 2026-09-16T14:41:51.000ZCVSS 9.8

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: NFSD: Prevent client use-after-free during export state revocation nfsd4_revoke_export_states() has the same use-after-free as nfsd4_revoke_states(): it drops nn->client_lock across revoke_one_stid() and the following read of clp->cl_minorversion, but the stateid reference it holds does not pin the client. A teardown racing the dropped lock can free the client while revoke_one_stid() still dereferences it. exportfs -u drives this path through NFSD_CMD_UNLOCK_EXPORT, so an administrator removing an export can race a client expiry. Skip a client that is already expiring and otherwise pin it with cl_rpc_users under client_lock before dropping the lock, matching nfsd4_revoke_states().

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: 7.2.5; 7.2; patch: 0; 2eac189bb059d31a29937b29ee0f477394198610 <2108de53568a64936a0da3e04d85c35df98d3fb6; patch: 7.3-rc1; 2eac189bb059d31a29937b29ee0f477394198610 <c05ae58fe06ce2ac34312f649e71c3596bdde358

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

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

• Linux — Linux

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