CVE-2026-89566: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: jbd2: check need_resched() when skipping busy checkpoint buffers journal_shrink_one_cp_list() skips busy checkpoint buffers when called with JBD2_SHRINK_BUSY_SKIP. The continue statement on this path also skips the need_resched() check at the end of the loop body. Consequently, when a checkpoint list contains mostly busy buffers, the shrinker can walk the entire list while holding journal->j_list_lock, even when a reschedule has been requested. Large checkpoint lists under memory pressure can therefore cause long lock hold times and leave other CPUs spinning on j_list_lock, resulting in soft lockups or RCU stalls. Route the busy-buffer path through the need_resched() check so that the shrinker can release j_list_lock and reschedule promptly, restoring parity with the clean-buffer path, which already checks need_resched(). This does not change which checkpoint buffers are eligible for removal.

Засегнати продукти

• Linux Linux: b98dba273a0e47dbfade89c9af73c5b012a4eabb преди dc7ece0b827fe3b748db685fb85cd2fc3710c3f9; b98dba273a0e47dbfade89c9af73c5b012a4eabb преди f83c23286e54180cdc83a36463a60003534cc290; b98dba273a0e47dbfade89c9af73c5b012a4eabb преди f9182a85991a0ad5cd2940df6db75f40ad90028c; b98dba273a0e47dbfade89c9af73c5b012a4eabb преди 595cac7f1b32d009b97f83dd2b2d6a1a445e9bb4; b98dba273a0e47dbfade89c9af73c5b012a4eabb преди f213e12ff5c9590b1034ae8da0e6d09665c772d0; 9c31bb2684f8035beca0275349d19d679b679ffb; 5fda50e262e65bd553ff777c4b280afd1495a18b; 557fda9ed70ebf8eda2620ba3d746215285a1303; 5.15.129 преди 5.16; 6.1.50 преди 6.2; 6.4.13 преди 6.5
• Linux Linux: 6.5; преди 6.5; 6.6.160 до 6.6.*; 6.12.109 до 6.12.*; 6.18.50 до 6.18.*; 7.2.4 до 7.2.*; от 7.3 нататък

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-2026-89566
• https://nvd.nist.gov/vuln/detail/CVE-2026-89566
• https://git.kernel.org/stable/c/dc7ece0b827fe3b748db685fb85cd2fc3710c3f9
• https://git.kernel.org/stable/c/f83c23286e54180cdc83a36463a60003534cc290
• https://git.kernel.org/stable/c/f9182a85991a0ad5cd2940df6db75f40ad90028c
• https://git.kernel.org/stable/c/595cac7f1b32d009b97f83dd2b2d6a1a445e9bb4
• https://git.kernel.org/stable/c/f213e12ff5c9590b1034ae8da0e6d09665c772d0