CVE-2026-90309RDMA/erdma: Hold CQ references when processing EQ events
- 7.8HighCVSS base score
- 0.17%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/erdma: Hold CQ references when processing EQ events EQ handlers look up CQs from dev->cq_xa and invoke CQ completion or error callbacks outside the xarray lock. erdma_destroy_cq() can erase the CQ from the xarray and free its queue buffer and doorbell record while a previously scheduled EQ handler is still using the CQ. Add a CQ refcount and take a reference under the xarray lock with refcount_inc_not_zero(). Remove the CQ from the xarray before dropping the destroy-path reference, then wait for in-flight EQ users before releasing CQ resources.
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 32 days later
· 32 days 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 |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 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)
- 0.17% · top 94% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 155055771704f8cbb5c176a4309b7dc30a50450c – < 610ef81797bb4f709e8675c1d8d093bb9ccdcbd8
- affected 155055771704f8cbb5c176a4309b7dc30a50450c – < c0a83f29a24c7e7f8516630848ef6db4c174deed
- affected 155055771704f8cbb5c176a4309b7dc30a50450c – < 05b8ca493dd02319bca93c640b259c2ba51ef321
- affected 155055771704f8cbb5c176a4309b7dc30a50450c – < 1fc9c1933959d2776a1ce7bf424251b8b5b586cd
- affected 155055771704f8cbb5c176a4309b7dc30a50450c – < 4545f355654d044d35a31cd01cc46f491a8a7c36
- affected 155055771704f8cbb5c176a4309b7dc30a50450c – < 98df2aee1459ee1c62c70cbe9b370d2a532aea36
- affected 6.0
- unaffected < 6.0
- unaffected 6.1.188 – ≤ 6.1.*
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.110 – ≤ 6.12.*
- unaffected 6.18.52 – ≤ 6.18.*
- unaffected 7.2.6 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References6
- https://git.kernel.org/stable/c/610ef81797bb4f709e8675c1d8d093bb9ccdcbd8 (opens in a new tab)
- https://git.kernel.org/stable/c/c0a83f29a24c7e7f8516630848ef6db4c174deed (opens in a new tab)
- https://git.kernel.org/stable/c/05b8ca493dd02319bca93c640b259c2ba51ef321 (opens in a new tab)
- https://git.kernel.org/stable/c/1fc9c1933959d2776a1ce7bf424251b8b5b586cd (opens in a new tab)
- https://git.kernel.org/stable/c/4545f355654d044d35a31cd01cc46f491a8a7c36 (opens in a new tab)
- https://git.kernel.org/stable/c/98df2aee1459ee1c62c70cbe9b370d2a532aea36 (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-2026-81970 (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-2026-90309)Record last updated .