CVE-2026-89567: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: jbd2: bound shrinker scans by examined checkpoint buffers The jbd2 shrinker currently accounts only checkpoint buffers that it successfully releases against nr_to_scan. Busy buffers therefore do not consume the scan budget. If a checkpoint transaction contains mostly busy buffers, the shrinker can scan its entire checkpoint list while holding journal->j_list_lock. Large checkpoint lists can result in excessive lock hold times and leave other CPUs spinning on j_list_lock, causing soft lockups or RCU stalls. Pass nr_to_scan into journal_shrink_one_cp_list() and decrement it for every buffer examined, including busy buffers. Pass NULL from checkpoint cleanup paths so their existing full-list behavior is preserved. This restores the scan-budget semantics that existed before journal_shrink_one_cp_list() was changed to always scan a complete checkpoint list.

Засегнати продукти

• Linux Linux: b98dba273a0e47dbfade89c9af73c5b012a4eabb преди 6b5366ba63a58819396045ab146bd37ff9e503c6; b98dba273a0e47dbfade89c9af73c5b012a4eabb преди edf5fcd0469b7467bd5b37a79502c8d9c3257dbb; b98dba273a0e47dbfade89c9af73c5b012a4eabb преди 71c6b872c746465fa4b5def239cb296173ca8216; b98dba273a0e47dbfade89c9af73c5b012a4eabb преди c2c0fb364685b8996c357d3b050394959b29d6e0; b98dba273a0e47dbfade89c9af73c5b012a4eabb преди 15cb16496446b94e67f7abcb049b8e2c75cd3d02; 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-2026-99265
• CVE-2026-99261
• CVE-2026-99260

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-89567
• https://nvd.nist.gov/vuln/detail/CVE-2026-89567
• https://git.kernel.org/stable/c/6b5366ba63a58819396045ab146bd37ff9e503c6
• https://git.kernel.org/stable/c/edf5fcd0469b7467bd5b37a79502c8d9c3257dbb
• https://git.kernel.org/stable/c/71c6b872c746465fa4b5def239cb296173ca8216
• https://git.kernel.org/stable/c/c2c0fb364685b8996c357d3b050394959b29d6e0
• https://git.kernel.org/stable/c/15cb16496446b94e67f7abcb049b8e2c75cd3d02