CVE-2026-31493RDMA/efa: Fix use of completion ctx after free
- 7.8HighCVSS base score
- 0.16%Exploitation in 30 daysEPSS · top 94% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
- 44 days later
· 44 days later
Published
- 7 months later
· 7 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.16% · top 94% of all CVEs (15 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 68fb9f3e312a36e49fd05ec2d6b668daf2c4931a – < 8c24b5179af260a5f36571c992d29aab1f448544
- affected 68fb9f3e312a36e49fd05ec2d6b668daf2c4931a – < 7ba09d85f177e9f5f64b881f33dbcb57b2cf23d5
- affected 68fb9f3e312a36e49fd05ec2d6b668daf2c4931a – < 0dd98aea1c0c45987fa2dd92f988b0eb1a72c125
- affected 68fb9f3e312a36e49fd05ec2d6b668daf2c4931a – < 1cf95fe5dc5471efea947b4c6f8913da6bc7976e
- affected 68fb9f3e312a36e49fd05ec2d6b668daf2c4931a – < ef3b06742c8a201d0e83edc9a33a89a4fe3009f8
- affected 5.12
- unaffected < 5.12
- unaffected 6.6.160 – ≤ 6.6.*
- unaffected 6.12.114 – ≤ 6.12.*
- unaffected 6.18.21 – ≤ 6.18.*
- unaffected 6.19.11 – ≤ 6.19.*
- unaffected 7.0 – ≤ *
References
References5
- https://git.kernel.org/stable/c/8c24b5179af260a5f36571c992d29aab1f448544 (opens in a new tab)
- https://git.kernel.org/stable/c/7ba09d85f177e9f5f64b881f33dbcb57b2cf23d5 (opens in a new tab)
- https://git.kernel.org/stable/c/0dd98aea1c0c45987fa2dd92f988b0eb1a72c125 (opens in a new tab)
- https://git.kernel.org/stable/c/1cf95fe5dc5471efea947b4c6f8913da6bc7976e (opens in a new tab)
- https://git.kernel.org/stable/c/ef3b06742c8a201d0e83edc9a33a89a4fe3009f8 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-24863 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-31493)Record last updated .