octeontx2-af: Workaround SQM/PSE stalls by disabling sticky

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Summary

CVECVE-2026-43296
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-08 14:16:36 UTC
Updated2026-05-15 15:03:44 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: octeontx2-af: Workaround SQM/PSE stalls by disabling sticky NIX SQ manager sticky mode is known to cause stalls when multiple SQs share an SMQ and transmit concurrently. Additionally, PSE may deadlock on transitions between sticky and non-sticky transmissions. There is also a credit drop issue observed when certain condition clocks are gated. work around these hardware errata by: - Disabling SQM sticky operation: - Clear TM6 (bit 15) - Clear TM11 (bit 14) - Disabling sticky → non-sticky transition path that can deadlock PSE: - Clear TM5 (bit 23) - Preventing credit drops by keeping the control-flow clock enabled: - Set TM9 (bit 21) These changes are applied via NIX_AF_SQM_DBG_CTL_STATUS. With this configuration the SQM/PSE maintain forward progress under load without credit loss, at the cost of disabling sticky optimizations.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.000520000 probability, percentile 0.161240000 (date 2026-05-12)

Problem Types: CWE-667

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

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

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 5d9b976d4480dc0dcfa3719b645636d2f0f9f156 9a3fd301329474f449e75f86d8a4f6b9c603fd6c git Not specified
CNA Linux Linux affected 5d9b976d4480dc0dcfa3719b645636d2f0f9f156 d0b3c8a80336029d9356f429151eb27922d80a3c git Not specified
CNA Linux Linux affected 5d9b976d4480dc0dcfa3719b645636d2f0f9f156 36cc5a5e0178d5fb79e04173b8aa623b0108819a git Not specified
CNA Linux Linux affected 5d9b976d4480dc0dcfa3719b645636d2f0f9f156 d9b549b6951ba178ec14339a031cae65f4e43fe1 git Not specified
CNA Linux Linux affected 5d9b976d4480dc0dcfa3719b645636d2f0f9f156 cec2ceb35ce7bc874c43812bb39200d6cf691b87 git Not specified
CNA Linux Linux affected 5d9b976d4480dc0dcfa3719b645636d2f0f9f156 8052d0587fb14b85539c3a14a226586c0c3d6b4c git Not specified
CNA Linux Linux affected 5d9b976d4480dc0dcfa3719b645636d2f0f9f156 b7eba260a34e854e2487b8363c11976f082df00d git Not specified
CNA Linux Linux affected 5d9b976d4480dc0dcfa3719b645636d2f0f9f156 70e9a5760abfb6338d63994d4de6b0778ec795d6 git Not specified
CNA Linux Linux affected 5.5 Not specified
CNA Linux Linux unaffected 5.5 semver Not specified
CNA Linux Linux unaffected 5.10.252 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.202 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.165 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.128 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.75 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.16 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.6 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/8052d0587fb14b85539c3a14a226586c0c3d6b4c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/cec2ceb35ce7bc874c43812bb39200d6cf691b87 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/36cc5a5e0178d5fb79e04173b8aa623b0108819a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/b7eba260a34e854e2487b8363c11976f082df00d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/9a3fd301329474f449e75f86d8a4f6b9c603fd6c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/d0b3c8a80336029d9356f429151eb27922d80a3c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/d9b549b6951ba178ec14339a031cae65f4e43fe1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/70e9a5760abfb6338d63994d4de6b0778ec795d6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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