SB20260925156 - Race condition in Linux kernel ipv6
Published: September 25, 2026
Security Bulletin ID
SB20260925156
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Race condition (CVE-ID: CVE-2026-93226)
CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to trigger a race condition.
The vulnerability exists due to an unsafe iteration of an RCU-protected list in rt6_nh_dump_exceptions() when dumping IPv6 route exceptions while exception entries are concurrently added. A local user can initiate an IPv6 route dump during concurrent route exception insertion to trigger a race condition.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/3665abc3d2ae8a78cb67f858e848481432ec75db
- https://git.kernel.org/stable/c/47cdab0d51aaa9bd85f8e4904585bd5bd4df4488
- https://git.kernel.org/stable/c/6bd3f94ed858f2d072627546b4cdf712b0f8ea88
- https://git.kernel.org/stable/c/9c6be625e1a7258e845d6193b3b6b084a00f8e9e
- https://git.kernel.org/stable/c/a602cd128d17a793e12888edc8eda85821ede7e1
- https://git.kernel.org/stable/c/dffbfb3117138e8e0e09d05f507bd36ca1f696e5
- https://git.kernel.org/stable/c/eda56ee17713f9dd834b922f7dbfa2e25fa6358c
- https://git.kernel.org/stable/c/f6b1b15848fd91fe122dac0d19d3d666e35075b6