CVE-2026-89567

CVE CVE-2026-89567EUVD EUVD-2026-76478Published 2026-09-11T19:44:37.000Z

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 7.2.4; patch: 6.12.109; 6.1.50 <6.2; b98dba273a0e47dbfade89c9af73c5b012a4eabb <15cb16496446b94e67f7abcb049b8e2c75cd3d02; b98dba273a0e47dbfade89c9af73c5b012a4eabb <edf5fcd0469b7467bd5b37a79502c8d9c3257dbb; patch: 6.18.50; b98dba273a0e47dbfade89c9af73c5b012a4eabb <71c6b872c746465fa4b5def239cb296173ca8216; 9c31bb2684f8035beca0275349d19d679b679ffb; 5.15.129 <5.16; b98dba273a0e47dbfade89c9af73c5b012a4eabb <c2c0fb364685b8996c357d3b050394959b29d6e0; patch: 7.3-rc1; patch: 0; 6.4.13 <6.5; 5fda50e262e65bd553ff777c4b280afd1495a18b; 557fda9ed70ebf8eda2620ba3d746215285a1303; 6.5

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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