CVE-2026-31493
RDMA/efa: Fix use of completion ctx after free
In the Linux kernel, the following vulnerability has been resolved: RDMA/efa: Fix use of completion ctx after free On admin queue completion handling, if the admin command completed with error we print data from the completion context. The issue is that we already freed the completion context in polling/interrupts handler which means we print data from context in an unknown state (it might be already used again). Change the admin submission flow so alloc/dealloc of the context will be symmetric and dealloc will be called after any potential use of the context.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Linux Linux |
≥ 68fb9f3e312a36e49fd05ec2d6b668daf2c4931a; < 8c24b5179af260a5f36571c992d29aab1f448544 (affected, git) ≥ 68fb9f3e312a36e49fd05ec2d6b668daf2c4931a; < 7ba09d85f177e9f5f64b881f33dbcb57b2cf23d5 (affected, git) ≥ 68fb9f3e312a36e49fd05ec2d6b668daf2c4931a; < 0dd98aea1c0c45987fa2dd92f988b0eb1a72c125 (affected, git) ≥ 68fb9f3e312a36e49fd05ec2d6b668daf2c4931a; < 1cf95fe5dc5471efea947b4c6f8913da6bc7976e (affected, git) ≥ 68fb9f3e312a36e49fd05ec2d6b668daf2c4931a; < ef3b06742c8a201d0e83edc9a33a89a4fe3009f8 (affected, git) Other versions: unaffected |
CNA: Linux |
| Linux Linux |
5.12 (affected) ≥ 0; < 5.12 (unaffected, semver) ≥ 6.6.160; ≤ 6.6.* (unaffected, semver) ≥ 6.12.114; ≤ 6.12.* (unaffected, semver) ≥ 6.18.21; ≤ 6.18.* (unaffected, semver) ≥ 6.19.11; ≤ 6.19.* (unaffected, semver) ≥ 7.0; ≤ * (unaffected, original_commit_for_fix) Other versions: affected |
CNA: Linux |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
No CVSS assessment reported. An unscored record is not a low-severity determination.
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://git.kernel.org/stable/c/8c24b5179af260a5f36571c992d29aab1f448544CNA: Linux
- https://git.kernel.org/stable/c/7ba09d85f177e9f5f64b881f33dbcb57b2cf23d5CNA: Linux
- https://git.kernel.org/stable/c/0dd98aea1c0c45987fa2dd92f988b0eb1a72c125CNA: Linux
- https://git.kernel.org/stable/c/1cf95fe5dc5471efea947b4c6f8913da6bc7976eCNA: Linux
- https://git.kernel.org/stable/c/ef3b06742c8a201d0e83edc9a33a89a4fe3009f8CNA: Linux
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