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NVD / CVE Program· CNA Linux

CVE-2026-68411: wifi: mac80211_hwsim: clamp virtio RX length before skb_put

Noroxi assessment

Priority: Monitor (action score 0/100)

  • 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: 0.17% (FIRST EPSS).
  • Fixed version: Linux Linux 10a2b430f8f06ae14b9590b6f6faa6b588ef0654, 5779e4a33e1666ddfeba43e96e29c4a9e5254ff0, 6dc76371a9a360c29de00df5b11563102d9d675a; azl3 kernel 6.6.143.1-1 on Azure Linux 3.0 6.6.150.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 10a2b430f8f06ae14b9590b6f6faa6b588ef0654, 5779e4a33e1666ddfeba43e96e29c4a9e5254ff0, 6dc76371a9a360c29de00df5b11563102d9d675a; azl3 kernel 6.6.143.1-1 on Azure Linux 3.0 6.6.150.1-1 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: wifi: mac80211_hwsim: clamp virtio RX length before skb_put hwsim_virtio_rx_work() passes the virtqueue used-ring length reported by the device straight to skb_put() on a fixed-size receive skb. A backend reporting a length larger than the skb tailroom drives skb_put() past the buffer end and hits skb_over_panic() -- a host-triggerable guest panic (denial of service). Clamp the length to the skb's available room before skb_put(). A conforming device never reports more than the posted buffer size, so valid frames are unaffected; a truncated over-report then fails the length/header checks in hwsim_virtio_handle_cmd() and is dropped, so truncating rather than dropping here cannot be turned into a parsing problem.

—No exploit Fix available
Published
Aug 10, 2026
Updated
Aug 19, 2026
EPSS
0.1% · 7th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

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.

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When you'll hear from us

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  • when exploit code appears or is weaponized
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  • 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.

—

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

    • 5.7affected
    • 5d44fe7c9808c56e136e59147bd932f5491520f1 and later · before 7f9d678b870fca8eaf1d46fa915cba0b1d5b387aaffected · git
    • 5d44fe7c9808c56e136e59147bd932f5491520f1 and later · before 909573d6a9b67354fc0515952574564e7c909c62affected · git
    • 5d44fe7c9808c56e136e59147bd932f5491520f1 and later · before 5779e4a33e1666ddfeba43e96e29c4a9e5254ff0affected · git
    • 5d44fe7c9808c56e136e59147bd932f5491520f1 and later · before 82c5a30a66e2a7337d99476c67d6fc1a99c4250eaffected · git
    • 5d44fe7c9808c56e136e59147bd932f5491520f1 and later · before fade308845c89f784da8a6780c1e77258488f1b6affected · git
    • 5d44fe7c9808c56e136e59147bd932f5491520f1 and later · before 6dc76371a9a360c29de00df5b11563102d9d675aaffected · git
    • 5d44fe7c9808c56e136e59147bd932f5491520f1 and later · before 99dc05c75acc3c8cde8d89c5371f4b569de5ac62affected · git
    • 5d44fe7c9808c56e136e59147bd932f5491520f1 and later · before 10a2b430f8f06ae14b9590b6f6faa6b588ef0654affected · git
    • before 5.7not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.187-16.1.187-1
Debian:12linux-6.12before 6.12.101-1~deb12u16.12.101-1~deb12u1
Debian:13linuxbefore 6.12.101-16.12.101-1
Debian:14linuxbefore 7.1.6-17.1.6-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-68395Aug 10, 2026 · ata: sata_dwc_460ex: enable SATA interrupts only after IRQ handler is registered
    0Monitor
  • ← EarlierCVE-2026-68407Aug 10, 2026 · wifi: nl80211: free RNR data on MBSSID mismatch
    0Monitor
  • Later →CVE-2026-68415Aug 10, 2026 · xfrm: clear mode callbacks after failed mode setup
    31Monitor

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 Linux10a2b430f8f06ae14b9590b6f6faa6b588ef0654Vendor (CNA)
Linux Linux5779e4a33e1666ddfeba43e96e29c4a9e5254ff0Vendor (CNA)
Linux Linux6dc76371a9a360c29de00df5b11563102d9d675aVendor (CNA)
Linux Linux7f9d678b870fca8eaf1d46fa915cba0b1d5b387aVendor (CNA)
Linux Linux82c5a30a66e2a7337d99476c67d6fc1a99c4250eVendor (CNA)
Linux Linux909573d6a9b67354fc0515952574564e7c909c62Vendor (CNA)
Linux Linux99dc05c75acc3c8cde8d89c5371f4b569de5ac62Vendor (CNA)
Linux Linuxfade308845c89f784da8a6780c1e77258488f1b6Vendor (CNA)
azl3 kernel 6.6.143.1-1 on Azure Linux 3.06.6.150.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.101-1~deb12u1 · Debian:12Package 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.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

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

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

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. Fix✗ → ✓

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

References

Show all references (7 more)

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

All records