CVE-2026-74306vfio/qat: fix f_pos race in qat_vf_resume_write()
- 7.8HighCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 97% 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: vfio/qat: fix f_pos race in qat_vf_resume_write() qat_vf_resume_write() checks filp->f_pos before taking migf->lock, but copies into the migration-state buffer after taking the lock and re-reading the shared file position. Two concurrent writers could therefore pass the bounds check with the old offset, then have the second writer copy after the first advanced f_pos, writing past the end of the migration-state buffer. Take migf->lock before doing the boundary checks.
Timeline
ID reserved
By Linux
Published
- 2 days later
· 2 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)
- 0.13% · top 97% 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 bb208810b1abf1c84870cfbe1cc9cf1a1d35c607 – < 6465af0004dc1b067129a26ef44f19cdf13bbce6
- affected bb208810b1abf1c84870cfbe1cc9cf1a1d35c607 – < d416dcefdbac90d96b22485fd93f28229ad9984b
- affected bb208810b1abf1c84870cfbe1cc9cf1a1d35c607 – < b6fd7a40a66485c8aa8156d8fcf50b95cb8ba281
- affected bb208810b1abf1c84870cfbe1cc9cf1a1d35c607 – < 4ec5e932e636896e97e4c6a8205b0ac76d52421a
- affected 6.10
- unaffected < 6.10
- unaffected 6.12.97 – ≤ 6.12.*
- unaffected 6.18.40 – ≤ 6.18.*
- unaffected 7.1.5 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References4
- https://git.kernel.org/stable/c/6465af0004dc1b067129a26ef44f19cdf13bbce6 (opens in a new tab)
- https://git.kernel.org/stable/c/d416dcefdbac90d96b22485fd93f28229ad9984b (opens in a new tab)
- https://git.kernel.org/stable/c/b6fd7a40a66485c8aa8156d8fcf50b95cb8ba281 (opens in a new tab)
- https://git.kernel.org/stable/c/4ec5e932e636896e97e4c6a8205b0ac76d52421a (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-2026-59453 (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-2026-74306)Record last updated .