High 7.8Published May 27, 2026

CVE-2026-45861gfs2: Fix slab-use-after-free in qd_put

Updated under an hour ago (Oct 27, 2026, 10:00 PM ET)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: gfs2: Fix slab-use-after-free in qd_put Commit a475c5dd16e5 ("gfs2: Free quota data objects synchronously") started freeing quota data objects during filesystem shutdown instead of putting them back onto the LRU list, but it failed to remove these objects from the LRU list, causing LRU list corruption. This caused use-after-free when the shrinker (gfs2_qd_shrink_scan) tried to access already-freed objects on the LRU list. Fix this by removing qd objects from the LRU list before freeing them in qd_put(). Initial fix from Deepanshu Kartikey <kartikey406@gmail.com>.

CVSS: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-416
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 21, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from a475c5dd16e57c570113eccba51955b5df8bb052 before 53aaf083de197946b25bc4ffa3068d37366ce73d; from a475c5dd16e57c570113eccba51955b5df8bb052 before ca7c67bdd293089b3483f18886d6b2d0037d2ad9; from a475c5dd16e57c570113eccba51955b5df8bb052 before 1d47922b98046b8070a77347fb883a6523792803; from a475c5dd16e57c570113eccba51955b5df8bb052 before 80fff26d7a0c3926b511661c27eecc811a420eef; from a475c5dd16e57c570113eccba51955b5df8bb052 before 22150a7d401d9e9169b9b68e05bed95f7f49bf69	CNA record
linux linux_kernel linux:linux_kernel	from 6.6 before 6.12.75; from 6.13 before 6.18.14; from 6.19 before 6.19.4	NVD

References

References

https://git.kernel.org/stable/c/53aaf083de197946b25bc4ffa3068d37366ce73d
https://git.kernel.org/stable/c/ca7c67bdd293089b3483f18886d6b2d0037d2ad9	patch
https://git.kernel.org/stable/c/1d47922b98046b8070a77347fb883a6523792803	patch
https://git.kernel.org/stable/c/80fff26d7a0c3926b511661c27eecc811a420eef	patch
https://git.kernel.org/stable/c/22150a7d401d9e9169b9b68e05bed95f7f49bf69	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.