CVE-2026-31454
In the Linux kernel, the following vulnerability has been resolved: xfs: save ailp before dropping the AIL lock in push callbacks In xfs_inode_item_push() and xfs_qm_dquot_logitem_push(), the AIL lock is dropped to perform buffer IO.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.13%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In the Linux kernel, the following vulnerability has been resolved: xfs: save ailp before dropping the AIL lock in push callbacks In xfs_inode_item_push() and xfs_qm_dquot_logitem_push(), the AIL lock is dropped to perform buffer IO. Once the cluster buffer no longer protects the log item from reclaim, the log item may be freed by background reclaim or the dquot shrinker. The subsequent spin_lock() call dereferences lip->li_ailp, which is a use-after-free. Fix this by saving the ailp pointer in a local variable while the AIL lock is held and the log item is guaranteed to be valid.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.13% probability · 3th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/19437e4f7bb909afde832b39372aa2f3ce3cfd88Patch
- https://git.kernel.org/stable/c/394d70b86fae9fe865e7e6d9540b7696f73aa9b6Patch
- https://git.kernel.org/stable/c/4c7d50147316cf049462f327c4a3e9dc2b7f1dd0Patch
- https://git.kernel.org/stable/c/50f5f056807b7bed74f4f307f2ca0ed92f3e556dPatch
- https://git.kernel.org/stable/c/6dbe17f19c290a72ce57d5abc70e1fad0c3e14e5Patch
- https://git.kernel.org/stable/c/75669e987137f49c99ca44406bf0200d1892dd16Patch
- https://git.kernel.org/stable/c/d8fc60bbaf5aea1604bf9f4ed565da6a1ac7a87dPatch
- https://git.kernel.org/stable/c/edd1637d4e3911ab6c760f553f2040fe72f61a13Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.