CVE-2026-45861 Details
Description
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 <[email protected]>.
A slab-use-after-free vulnerability has been identified in the Linux kernel's GFS2 file system. This issue arises from a change that began freeing quota data objects during file system shutdown without properly removing them from the LRU list, leading to corruption. The problem was exacerbated when the shrinker function attempted to access these already-freed objects, causing a use-after-free condition. The vulnerability affects the Linux kernel stable tree.
Users can apply the latest patches available in the Linux kernel stable tree to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/1d47922b98046b8070a77347fb883a6523792803 | kernel.org | Patch |
| https://git.kernel.org/stable/c/22150a7d401d9e9169b9b68e05bed95f7f49bf69 | kernel.org | Patch |
| https://git.kernel.org/stable/c/80fff26d7a0c3926b511661c27eecc811a420eef | kernel.org | Patch |
| https://git.kernel.org/stable/c/ca7c67bdd293089b3483f18886d6b2d0037d2ad9 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-416 | Use After Free | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 6.6, < 6.12.75 >= 6.13, < 6.18.14 >= 6.19, < 6.19.4 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 25, 2026 | Initial Analysis | [email protected] |
| Jun 17, 2026 | CVE Modified | kernel.org |
| May 30, 2026 | CVE Modified | kernel.org |
| May 27, 2026 | New CVE Received | kernel.org |