CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се по мрежата, без особени условия, без вход и без действие от потребителя.
Описание
Оригинално описание
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().
Засегнати продукти
- Linux Linux: 2eac189bb059d31a29937b29ee0f477394198610 преди c05ae58fe06ce2ac34312f649e71c3596bdde358; 2eac189bb059d31a29937b29ee0f477394198610 преди 2108de53568a64936a0da3e04d85c35df98d3fb6
- Linux Linux: 7.2; преди 7.2; 7.2.5 до 7.2.*; от 7.3 нататък
История
- 16 септември 2026 Публикувано