firmware: arm_scmi: Unwind TX receiver mailbox setup failure

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-93083
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-17 17:18:02 UTC
Updated2026-09-17 17:18:02 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: firmware: arm_scmi: Unwind TX receiver mailbox setup failure mailbox_chan_setup() can request an additional unidirectional TX receiver channel after successfully acquiring the primary channel. If that second request fails, the function returns immediately and leaves the primary channel allocated. Unwind the primary mailbox channel before returning the error so probe deferral or other setup failures do not leave the channel busy for later probe attempts.

Risk And Classification

EPSS: 0.001680000 probability, percentile 0.065040000 (date 2026-09-18)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 9f68ff79ec2cb303f360a35eef5dd8f1f0f817e1 babb017cf5e4600c94c23ea87175a0380235a3ee git Not specified
CNA Linux Linux affected 9f68ff79ec2cb303f360a35eef5dd8f1f0f817e1 717b8e972a667fc1bebe63cbcf0d58e692cbb491 git Not specified
CNA Linux Linux affected 9f68ff79ec2cb303f360a35eef5dd8f1f0f817e1 9958f55eace8b43713c9fc54dcf90e7cdefee413 git Not specified
CNA Linux Linux affected 9f68ff79ec2cb303f360a35eef5dd8f1f0f817e1 6f7c06744d53dc8e047725d411d7f915d9ec35ae git Not specified
CNA Linux Linux affected 6.4 Not specified
CNA Linux Linux unaffected 6.4 semver Not specified
CNA Linux Linux unaffected 6.12.110 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.52 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.6 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/6f7c06744d53dc8e047725d411d7f915d9ec35ae 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/717b8e972a667fc1bebe63cbcf0d58e692cbb491 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9958f55eace8b43713c9fc54dcf90e7cdefee413 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/babb017cf5e4600c94c23ea87175a0380235a3ee 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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