CVE-2026-89658: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: NFSD: Prevent client use-after-free during NFSv4.0 revoked-state cleanup nfs40_clean_admin_revoked() takes a stateid reference under clp->cl_lock, drops nn->client_lock, and calls nfsd4_drop_revoked_stid(), which dereferences the stateid's client through s->sc_client->cl_lock. The stateid reference does not pin the client, so a teardown racing the dropped lock can free the client while nfsd4_drop_revoked_stid() is still using it. This cleanup runs from the laundromat, so a periodic sweep can race force_expire_client() driven by a write to the clients/<id>/ctl file. 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().

Засегнати продукти

• Linux Linux: d688d8585e6bea5e4e37f7497feea93b6b0a469c преди 0ae0d2b5c5a1b39c0b3c15d96b32a5b0c583d519; d688d8585e6bea5e4e37f7497feea93b6b0a469c преди b413ec5b23e3445dc9c4f273116078e2d4747626; d688d8585e6bea5e4e37f7497feea93b6b0a469c преди 81cf7f1413862f87b078920c838460a6a88aa030; d688d8585e6bea5e4e37f7497feea93b6b0a469c преди 7b4f8a1586c42d3afc3c0ac779af2db7ab1a5c55
• Linux Linux: 6.9; преди 6.9; 6.12.109 до 6.12.*; 6.18.50 до 6.18.*; 7.2.4 до 7.2.*; 7.3 до *

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99268
• CVE-2026-99266
• CVE-2026-99267

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-89658
• https://nvd.nist.gov/vuln/detail/CVE-2026-89658
• https://git.kernel.org/stable/c/0ae0d2b5c5a1b39c0b3c15d96b32a5b0c583d519
• https://git.kernel.org/stable/c/b413ec5b23e3445dc9c4f273116078e2d4747626
• https://git.kernel.org/stable/c/81cf7f1413862f87b078920c838460a6a88aa030
• https://git.kernel.org/stable/c/7b4f8a1586c42d3afc3c0ac779af2db7ab1a5c55