SB20260508101 - Race condition in Linux kernel ceph
Published: May 8, 2026
Security Bulletin ID
SB20260508101
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Race condition (CVE-ID: CVE-2026-43420)
CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a race condition in ceph_unlink() when processing asynchronous unlink operations. A local user can trigger concurrent unlink completion handling to cause a denial of service.
Only the asynchronous unlink code path is affected.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/6d5fd8bb574bef039eb3b738e523870433a2aeb9
- https://git.kernel.org/stable/c/7db008e85a5d17b64bc5390b828bf457ae91a415
- https://git.kernel.org/stable/c/8975b85b0d45ca811ace6fac5907652f2310e5ac
- https://git.kernel.org/stable/c/9b31e88ac5623d15c8bc46f69dfe1d3b43a8f67c
- https://git.kernel.org/stable/c/aedd29386b23f3e1e6818943e11abfff2953732f
- https://git.kernel.org/stable/c/b3f5513141ecc6b277a8f7b7efe58a0cf9a5e859
- https://git.kernel.org/stable/c/ce0123cbb4a40a2f1bbb815f292b26e96088639f
- https://git.kernel.org/stable/c/fcc477a6e8856c8a42b3c9e171724d8d6dfadd06