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Vulnerability record · CVE-2026-43296 · published 8 May 2026

CVE-2026-43296: Linux kernel vulnerability

Linux · Linux Kernel

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.

7.5 CVSS 3.1 High EPSS 0.55% · top 56.0% CWE-667 · CWE-667
7.5CVSS 3.1 base score
0.55%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/36cc5a5e0178d5fb79e04173b8aa623b0108819a Patch
https://git.kernel.org/stable/c/70e9a5760abfb6338d63994d4de6b0778ec795d6 Patch
https://git.kernel.org/stable/c/8052d0587fb14b85539c3a14a226586c0c3d6b4c Patch
https://git.kernel.org/stable/c/9a3fd301329474f449e75f86d8a4f6b9c603fd6c Patch
https://git.kernel.org/stable/c/b7eba260a34e854e2487b8363c11976f082df00d Patch
https://git.kernel.org/stable/c/cec2ceb35ce7bc874c43812bb39200d6cf691b87 Patch
https://git.kernel.org/stable/c/d0b3c8a80336029d9356f429151eb27922d80a3c Patch
https://git.kernel.org/stable/c/d9b549b6951ba178ec14339a031cae65f4e43fe1 Patch

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Source: NIST National Vulnerability Database (record CVE-2026-43296), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.