CVE-2026-43296

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

State: Published
Severity: 7.5 High
Published: May 8, 2026
Updated: Aug 5, 2026
Reserved: May 1, 2026

Description

In 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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	5d9b976d4480dc0dcfa3719b645636d2f0f9f156 to before 9a3fd301329474f449e75f86d8a4f6b9c603fd6cAffected 5d9b976d4480dc0dcfa3719b645636d2f0f9f156 to before d0b3c8a80336029d9356f429151eb27922d80a3cAffected 5d9b976d4480dc0dcfa3719b645636d2f0f9f156 to before 36cc5a5e0178d5fb79e04173b8aa623b0108819aAffected 5d9b976d4480dc0dcfa3719b645636d2f0f9f156 to before d9b549b6951ba178ec14339a031cae65f4e43fe1Affected 5d9b976d4480dc0dcfa3719b645636d2f0f9f156 to before cec2ceb35ce7bc874c43812bb39200d6cf691b87Affected 5d9b976d4480dc0dcfa3719b645636d2f0f9f156 to before 8052d0587fb14b85539c3a14a226586c0c3d6b4cAffected 5d9b976d4480dc0dcfa3719b645636d2f0f9f156 to before b7eba260a34e854e2487b8363c11976f082df00dAffected 5d9b976d4480dc0dcfa3719b645636d2f0f9f156 to before 70e9a5760abfb6338d63994d4de6b0778ec795d6Affected
LinuxLinux	5.5Affected before 5.5Not affected 5.10.252 through 5.10.Not affected 5.15.202 through 5.15.Not affected 6.1.165 through 6.1.Not affected 6.6.128 through 6.6.Not affected 6.12.75 through 6.12.Not affected 6.18.16 through 6.18.Not affected 6.19.6 through 6.19.*Not affected 7.0 and laterNot affected

Product

Versions

LinuxLinux

5d9b976d4480dc0dcfa3719b645636d2f0f9f156 to before 9a3fd301329474f449e75f86d8a4f6b9c603fd6cAffected
5d9b976d4480dc0dcfa3719b645636d2f0f9f156 to before d0b3c8a80336029d9356f429151eb27922d80a3cAffected
5d9b976d4480dc0dcfa3719b645636d2f0f9f156 to before 36cc5a5e0178d5fb79e04173b8aa623b0108819aAffected
5d9b976d4480dc0dcfa3719b645636d2f0f9f156 to before d9b549b6951ba178ec14339a031cae65f4e43fe1Affected
5d9b976d4480dc0dcfa3719b645636d2f0f9f156 to before cec2ceb35ce7bc874c43812bb39200d6cf691b87Affected
5d9b976d4480dc0dcfa3719b645636d2f0f9f156 to before 8052d0587fb14b85539c3a14a226586c0c3d6b4cAffected
5d9b976d4480dc0dcfa3719b645636d2f0f9f156 to before b7eba260a34e854e2487b8363c11976f082df00dAffected
5d9b976d4480dc0dcfa3719b645636d2f0f9f156 to before 70e9a5760abfb6338d63994d4de6b0778ec795d6Affected

LinuxLinux

5.5Affected
before 5.5Not affected
5.10.252 through 5.10.*Not affected
5.15.202 through 5.15.*Not affected
6.1.165 through 6.1.*Not affected
6.6.128 through 6.6.*Not affected
6.12.75 through 6.12.*Not affected
6.18.16 through 6.18.*Not affected
6.19.6 through 6.19.*Not affected
7.0 and laterNot affected

References

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