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NVD / CVE Program· CNA Linux

CVE-2026-43157: octeontx2-af: CGX: fix bitmap leaks

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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: 0.12% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 013ac469596a0b8671e62d89c89ae0bd46bbe667, 3def995c4ede842adf509c410e92d09a0cedc965, 6d389382ee655128056fbdab86baad8495ffbf33.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 013ac469596a0b8671e62d89c89ae0bd46bbe667, 3def995c4ede842adf509c410e92d09a0cedc965, 6d389382ee655128056fbdab86baad8495ffbf33 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: CGX: fix bitmap leaks The RX/TX flow-control bitmaps (rx_fc_pfvf_bmap and tx_fc_pfvf_bmap) are allocated by cgx_lmac_init() but never freed in cgx_lmac_exit(). Unbinding and rebinding the driver therefore triggers kmemleak: unreferenced object (size 16): backtrace: rvu_alloc_bitmap cgx_probe Free both bitmaps during teardown.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
May 6, 2026
Updated
Nov 6, 2026
EPSS
0.1% · 2th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

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

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-43157

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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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.

VendorProduct
linuxlinux kernel

Affected versions

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

  • linux linux kernel5.18 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

    • 5.18affected
    • e740003874edc13e468d19233f99787bedb4bb8e and later · before ad8a13a45c5c24d0d32de9a1c3fd58498a675eceaffected · git
    • e740003874edc13e468d19233f99787bedb4bb8e and later · before 013ac469596a0b8671e62d89c89ae0bd46bbe667affected · git
    • e740003874edc13e468d19233f99787bedb4bb8e and later · before ccef79af58b43787c25710c9da96651c6ddfe50faffected · git
    • e740003874edc13e468d19233f99787bedb4bb8e and later · before 6d389382ee655128056fbdab86baad8495ffbf33affected · git
    • e740003874edc13e468d19233f99787bedb4bb8e and later · before ccca14bbdcc25829d355b9f4d3249f43dadb71c1affected · git
    • e740003874edc13e468d19233f99787bedb4bb8e and later · before 3def995c4ede842adf509c410e92d09a0cedc965affected · git
    • before 5.18not affected · semver
    • 6.1.165 and later · up to and including 6.1.*not affected · semver
    • 6.6.128 and later · up to and including 6.6.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.170-16.1.170-1
Debian:13linuxbefore 6.12.85-16.12.85-1
Debian:14linuxbefore 6.19.6-16.19.6-1
SUSE:Linux Micro 6.0kernel-defaultbefore 6.4.0-50.16.4.0-50.1
SUSE:Linux Micro 6.0kernel-kvmsmallbefore 6.4.0-50.16.4.0-50.1
SUSE:Linux Micro 6.0kernel-rtbefore 6.4.0-50.16.4.0-50.1
SUSE:Linux Micro 6.0kernel-sourcebefore 6.4.0-50.26.4.0-50.2
SUSE:Linux Micro 6.0kernel-source-rtbefore 6.4.0-50.26.4.0-50.2

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
    90Now
  • 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-2026-43153May 6, 2026 · xfs: remove xfs_attr_leaf_hasname
    31Monitor
  • ← EarlierCVE-2026-43156May 6, 2026 · net: usb: pegasus: enable basic endpoint checking
    22Monitor
  • Later →CVE-2026-43158May 6, 2026 · xfs: fix freemap adjustments when adding xattrs to leaf blocks
    35Monitor

Remediation

Which version to upgrade to

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

Product / packageFixed versionSource
Linux Linux013ac469596a0b8671e62d89c89ae0bd46bbe667Vendor (CNA)
Linux Linux3def995c4ede842adf509c410e92d09a0cedc965Vendor (CNA)
Linux Linux6d389382ee655128056fbdab86baad8495ffbf33Vendor (CNA)
Linux Linuxad8a13a45c5c24d0d32de9a1c3fd58498a675eceVendor (CNA)
Linux Linuxccca14bbdcc25829d355b9f4d3249f43dadb71c1Vendor (CNA)
Linux Linuxccef79af58b43787c25710c9da96651c6ddfe50fVendor (CNA)
debian:linux6.1.170-1 · Debian:12Package registry (OSV)
suse:kernel-default6.4.0-50.1 · SUSE:Linux Micro 6.0Package registry (OSV)
suse:kernel-kvmsmall6.4.0-50.1 · SUSE:Linux Micro 6.0Package registry (OSV)
suse:kernel-rt6.4.0-50.1 · SUSE:Linux Micro 6.0Package registry (OSV)
suse:kernel-source6.4.0-50.2 · SUSE:Linux Micro 6.0Package registry (OSV)
suse:kernel-source-rt6.4.0-50.2 · SUSE:Linux Micro 6.0Package 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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-401 · Missing Release of Memory after Effective Lifetime

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (5 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records