SB2026102213 - Use-after-free in Linux kernel xfs
Published: October 22, 2026
Security Bulletin ID
SB2026102213
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-98443)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to potentially cause a denial of service through kernel memory corruption.
The vulnerability exists due to use-after-free in the XFS xlog_recover_iunlink_bucket function when recovering unlinked inode buckets and an inode garbage-collection flush fails. A local user can potentially trigger this recovery error path to cause access to a released inode and a kernel crash.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/47a948ba653a463d429e02fda2f06a3d6b78666d
- https://git.kernel.org/stable/c/65f39d09d73718611cee40399179323b5d4ead00
- https://git.kernel.org/stable/c/66a2179d02668f8df44b1a249899006f3ba38ea0
- https://git.kernel.org/stable/c/8c9d5b8a96d6b93eb24e07b4163c89341ba29bd1
- https://git.kernel.org/stable/c/961c717e6bf0e53c2c2b1fe4aef1add9390fedab