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CVE-2026-89567

jbd2: bound shrinker scans by examined checkpoint buffers

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.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version b98dba273a0e47dbfade89c9af73c5b012a4eabb
Version < edf5fcd0469b7467bd5b37a79502c8d9c3257dbb
Status affected
Version b98dba273a0e47dbfade89c9af73c5b012a4eabb
Version < 71c6b872c746465fa4b5def239cb296173ca8216
Status affected
Version b98dba273a0e47dbfade89c9af73c5b012a4eabb
Version < c2c0fb364685b8996c357d3b050394959b29d6e0
Status affected
Version b98dba273a0e47dbfade89c9af73c5b012a4eabb
Version < 15cb16496446b94e67f7abcb049b8e2c75cd3d02
Status affected
Version 9c31bb2684f8035beca0275349d19d679b679ffb
Status affected
Version 5fda50e262e65bd553ff777c4b280afd1495a18b
Status affected
Version 557fda9ed70ebf8eda2620ba3d746215285a1303
Status affected
Version 5.15.129
Version < 5.16
Status affected
Version 6.1.50
Version < 6.2
Status affected
Version 6.4.13
Version < 6.5
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 6.5
Status affected
Version 0
Version < 6.5
Status unaffected
Version <= 6.12.*
Version 6.12.109
Status unaffected
Version <= 6.18.*
Version 6.18.50
Status unaffected
Version <= 7.2.*
Version 7.2.4
Status unaffected
Version <= *
Version 7.3-rc1
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.2% 0.1
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
Es wurden noch keine Informationen zu CWE veröffentlicht.
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