RDMA/efa: Fix use of completion ctx after free

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Summary

CVECVE-2026-31493
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-22 14:16:47 UTC
Updated2026-04-22 14:16:47 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: RDMA/efa: Fix use of completion ctx after free On admin queue completion handling, if the admin command completed with error we print data from the completion context. The issue is that we already freed the completion context in polling/interrupts handler which means we print data from context in an unknown state (it might be already used again). Change the admin submission flow so alloc/dealloc of the context will be symmetric and dealloc will be called after any potential use of the context.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 68fb9f3e312a36e49fd05ec2d6b668daf2c4931a 0dd98aea1c0c45987fa2dd92f988b0eb1a72c125 git Not specified
CNA Linux Linux affected 68fb9f3e312a36e49fd05ec2d6b668daf2c4931a 1cf95fe5dc5471efea947b4c6f8913da6bc7976e git Not specified
CNA Linux Linux affected 68fb9f3e312a36e49fd05ec2d6b668daf2c4931a ef3b06742c8a201d0e83edc9a33a89a4fe3009f8 git Not specified
CNA Linux Linux affected 5.12 Not specified
CNA Linux Linux unaffected 5.12 semver Not specified
CNA Linux Linux unaffected 6.18.21 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.11 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/1cf95fe5dc5471efea947b4c6f8913da6bc7976e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ef3b06742c8a201d0e83edc9a33a89a4fe3009f8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0dd98aea1c0c45987fa2dd92f988b0eb1a72c125 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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