CVE-2026-74536: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: fix leaking sk after socket release iso_sock_kill() tests !sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket || sock_flag(sk, SOCK_DEAD) for early return, but this is always true since sock_orphan(sk) sets SOCK_DEAD, so the sk reference released by socket always leaks, iso_sock_destruct is never called. The socket reference also leaks when __iso_sock_close() does not set SOCK_ZAPPED, since iso_conn_del() does not call iso_sock_kill() after zapping. Fix by replacing SOCK_DEAD by BT_SK_KILLED flag that is not used for something else, and lock_sock to ensure iso_sock_kill() puts sk only after socket release only once. Release and iso_conn_del may run concurrently. Call iso_sock_kill() from iso_conn_del() to clean sk up after zapping. Remove call to iso_sock_kill() from iso_sock_close(), as it's generally no-op there.

Засегнати продукти

• Linux Linux: ccf74f2390d60a2f9a75ef496d2564abb478f46a преди 96ed3c772c08e7a91c399567f412618e43231023; ccf74f2390d60a2f9a75ef496d2564abb478f46a преди e76a0ae6542ae43241b2147bacf4990e7ae5316a; ccf74f2390d60a2f9a75ef496d2564abb478f46a преди e30e5ca63c8fbe3cd505fbb419bb547760cda633; ccf74f2390d60a2f9a75ef496d2564abb478f46a преди ce57442a379212fe3fda59c9437ee8217eceb5b1
• Linux Linux: 6.0; преди 6.0; 6.12.103 до 6.12.*; 6.18.44 до 6.18.*; 7.1.8 до 7.1.*; от 7.2 нататък

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99265
• CVE-2026-99261
• CVE-2026-99260

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-74536
• https://nvd.nist.gov/vuln/detail/CVE-2026-74536
• https://git.kernel.org/stable/c/96ed3c772c08e7a91c399567f412618e43231023
• https://git.kernel.org/stable/c/e76a0ae6542ae43241b2147bacf4990e7ae5316a
• https://git.kernel.org/stable/c/e30e5ca63c8fbe3cd505fbb419bb547760cda633
• https://git.kernel.org/stable/c/ce57442a379212fe3fda59c9437ee8217eceb5b1