What’s Vulnerable › Vulnerabilities

CVE-2026-74306: vfio/qat: fix f_pos race in qat_vf_resume_write()

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-08-17

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.

Affected products

• Linux kernel: 6.10 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/4ec5e932e636896e97e4c6a8205b0ac76d52421a
• https://git.kernel.org/stable/c/6465af0004dc1b067129a26ef44f19cdf13bbce6
• https://git.kernel.org/stable/c/b6fd7a40a66485c8aa8156d8fcf50b95cb8ba281
• https://git.kernel.org/stable/c/d416dcefdbac90d96b22485fd93f28229ad9984b

Get alerted when CVE-2026-74306 or the next vulnerability affects your stack