vfio/qat: fix f_pos race in qat_vf_resume_write()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-74306
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 06:22:30 UTC
Updated2026-08-17 06:19:24 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.001280000 probability, percentile 0.029160000 (date 2026-08-17)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected bb208810b1abf1c84870cfbe1cc9cf1a1d35c607 6465af0004dc1b067129a26ef44f19cdf13bbce6 git Not specified
CNA Linux Linux affected bb208810b1abf1c84870cfbe1cc9cf1a1d35c607 d416dcefdbac90d96b22485fd93f28229ad9984b git Not specified
CNA Linux Linux affected bb208810b1abf1c84870cfbe1cc9cf1a1d35c607 b6fd7a40a66485c8aa8156d8fcf50b95cb8ba281 git Not specified
CNA Linux Linux affected bb208810b1abf1c84870cfbe1cc9cf1a1d35c607 4ec5e932e636896e97e4c6a8205b0ac76d52421a git Not specified
CNA Linux Linux affected 6.10 Not specified
CNA Linux Linux unaffected 6.10 semver Not specified
CNA Linux Linux unaffected 6.12.97 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.40 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/b6fd7a40a66485c8aa8156d8fcf50b95cb8ba281 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4ec5e932e636896e97e4c6a8205b0ac76d52421a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6465af0004dc1b067129a26ef44f19cdf13bbce6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d416dcefdbac90d96b22485fd93f28229ad9984b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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