CVE-2026-74306

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinuxbb208810b1abf1c84870cfbe1cc9cf1a1d35c607 < 6465af0004dc1b067129a26ef44f19cdf13bbce6affected
LinuxLinuxbb208810b1abf1c84870cfbe1cc9cf1a1d35c607 < d416dcefdbac90d96b22485fd93f28229ad9984baffected
LinuxLinuxbb208810b1abf1c84870cfbe1cc9cf1a1d35c607 < b6fd7a40a66485c8aa8156d8fcf50b95cb8ba281affected
LinuxLinuxbb208810b1abf1c84870cfbe1cc9cf1a1d35c607 < 4ec5e932e636896e97e4c6a8205b0ac76d52421aaffected
LinuxLinux6.10affected
LinuxLinux0 < 6.10unaffected
LinuxLinux6.12.97 <= 6.12.*unaffected
LinuxLinux6.18.40 <= 6.18.*unaffected
LinuxLinux7.1.5 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References