Answer in brief
CVE-2026-89567 records a Unknown severity vulnerability in jbd2: bound shrinker scans by examined checkpoint buffers. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=b98dba273a0e47dbfade89c9af73c5b012a4eabb <edf5fcd0469b7467bd5b37a79502c8d9c3257dbb || >=b98dba273a0e47dbfade89c9af73c5b012a4eabb <71c6b872c746465fa4b5def239cb296173ca8216 || >=b98dba273a0e47dbfade89c9af73c5b012a4eabb <c2c0fb364685b8996c357d3b050394959b29d6e0 || >=b98dba273a0e47dbfade89c9af73c5b012a4eabb <15cb16496446b94e67f7abcb049b8e2c75cd3d02 || 9c31bb2684f8035beca0275349d19d679b679ffb || 5fda50e262e65bd553ff777c4b280afd1495a18b || 557fda9ed70ebf8eda2620ba3d746215285a1303 || >=5.15.129 <5.16 || >=6.1.50 <6.2 || >=6.4.13 <6.5 | edf5fcd0469b7467bd5b37a79502c8d9c3257dbb, 71c6b872c746465fa4b5def239cb296173ca8216, c2c0fb364685b8996c357d3b050394959b29d6e0, 15cb16496446b94e67f7abcb049b8e2c75cd3d02, 5.16, 6.2, 6.5 |
| Linux/Linuxgeneric | 6.5 | Not reported |
| Linux/Linuxgeneric | >=b98dba273a0e47dbfade89c9af73c5b012a4eabb <6b5366ba63a58819396045ab146bd37ff9e503c6 || >=b98dba273a0e47dbfade89c9af73c5b012a4eabb <edf5fcd0469b7467bd5b37a79502c8d9c3257dbb || >=b98dba273a0e47dbfade89c9af73c5b012a4eabb <71c6b872c746465fa4b5def239cb296173ca8216 || >=b98dba273a0e47dbfade89c9af73c5b012a4eabb <c2c0fb364685b8996c357d3b050394959b29d6e0 || >=b98dba273a0e47dbfade89c9af73c5b012a4eabb <15cb16496446b94e67f7abcb049b8e2c75cd3d02 || 9c31bb2684f8035beca0275349d19d679b679ffb || 5fda50e262e65bd553ff777c4b280afd1495a18b || 557fda9ed70ebf8eda2620ba3d746215285a1303 || >=5.15.129 <5.16 || >=6.1.50 <6.2 || >=6.4.13 <6.5 | 6b5366ba63a58819396045ab146bd37ff9e503c6, edf5fcd0469b7467bd5b37a79502c8d9c3257dbb, 71c6b872c746465fa4b5def239cb296173ca8216, c2c0fb364685b8996c357d3b050394959b29d6e0, 15cb16496446b94e67f7abcb049b8e2c75cd3d02, 5.16, 6.2, 6.5 |
Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 11, 2026
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.
Quoted source text, attributed separately from HOL analysis.