NVD / CVE Program· CNA Linux

CVE-2026-43296: octeontx2-af: Workaround SQM/PSE stalls by disabling sticky

Noroxi assessment

Priority: Monitor (action score 30/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.38% (FIRST EPSS).
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
Fixed version: Linux Linux 36cc5a5e0178d5fb79e04173b8aa623b0108819a, 70e9a5760abfb6338d63994d4de6b0778ec795d6, 8052d0587fb14b85539c3a14a226586c0c3d6b4c.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 36cc5a5e0178d5fb79e04173b8aa623b0108819a, 70e9a5760abfb6338d63994d4de6b0778ec795d6, 8052d0587fb14b85539c3a14a226586c0c3d6b4c or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

HighCVSS 7.5 · v3.1—No exploit Fix available

BDU:2026-11740

Published: May 8, 2026
Updated: Aug 5, 2026
EPSS: 0.3% · 32th percentile
CWE: CWE-667

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Action score

Monitor

Low priority for now.

CVSS: 30 / 40 · 7.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.3%

CNA vs NVD score

NVD: —
CNA · Linux: 7.5; NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

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Noroxi analysis

What does it mean in your environment?

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
linux	linux kernel	cpe:2.3:o:linux:linux_kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

linux linux kernel5.5 and later · before 5.10.252
linux linux kernel5.11 and later · before 5.15.202
linux linux kernel5.16 and later · before 6.1.165
linux linux kernel6.2 and later · before 6.6.128
linux linux kernel6.7 and later · before 6.12.75
linux linux kernel6.13 and later · before 6.18.16
linux linux kernel6.19 and later · before 6.19.6

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

Linux Linux
- 5.5affected
- 5d9b976d4480dc0dcfa3719b645636d2f0f9f156 and later · before 9a3fd301329474f449e75f86d8a4f6b9c603fd6caffected · git
- 5d9b976d4480dc0dcfa3719b645636d2f0f9f156 and later · before d0b3c8a80336029d9356f429151eb27922d80a3caffected · git
- 5d9b976d4480dc0dcfa3719b645636d2f0f9f156 and later · before 36cc5a5e0178d5fb79e04173b8aa623b0108819aaffected · git
- 5d9b976d4480dc0dcfa3719b645636d2f0f9f156 and later · before d9b549b6951ba178ec14339a031cae65f4e43fe1affected · git
- 5d9b976d4480dc0dcfa3719b645636d2f0f9f156 and later · before cec2ceb35ce7bc874c43812bb39200d6cf691b87affected · git
- 5d9b976d4480dc0dcfa3719b645636d2f0f9f156 and later · before 8052d0587fb14b85539c3a14a226586c0c3d6b4caffected · git
- 5d9b976d4480dc0dcfa3719b645636d2f0f9f156 and later · before b7eba260a34e854e2487b8363c11976f082df00daffected · git
- 5d9b976d4480dc0dcfa3719b645636d2f0f9f156 and later · before 70e9a5760abfb6338d63994d4de6b0778ec795d6affected · git
- before 5.5not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Debian:12	linux	before 6.1.170-1	6.1.170-1
Debian:13	linux	before 6.12.85-1	6.12.85-1
Debian:14	linux	before 6.19.6-1	6.19.6-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
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CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
89Now
CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
85Now

Published before and after this one in the same product

← EarlierCVE-2026-43293May 8, 2026 · media: chips-media: wave5: Fix kthread worker destruction in polling mode
22Monitor
← EarlierCVE-2026-43295May 8, 2026 · rapidio: replace rio_free_net() with kfree() in rio_scan_alloc_net()
22Monitor
Later →CVE-2026-43297May 8, 2026 · media: rockchip: rga: Fix possible ERR_PTR dereference in rga_buf_init()
22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
Linux Linux	36cc5a5e0178d5fb79e04173b8aa623b0108819a	Vendor (CNA)
Linux Linux	70e9a5760abfb6338d63994d4de6b0778ec795d6	Vendor (CNA)
Linux Linux	8052d0587fb14b85539c3a14a226586c0c3d6b4c	Vendor (CNA)
Linux Linux	9a3fd301329474f449e75f86d8a4f6b9c603fd6c	Vendor (CNA)
Linux Linux	b7eba260a34e854e2487b8363c11976f082df00d	Vendor (CNA)
Linux Linux	cec2ceb35ce7bc874c43812bb39200d6cf691b87	Vendor (CNA)
Linux Linux	d0b3c8a80336029d9356f429151eb27922d80a3c	Vendor (CNA)
Linux Linux	d9b549b6951ba178ec14339a031cae65f4e43fe1	Vendor (CNA)
debian:linux	6.1.170-1 · Debian:12	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).