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NVD / CVE Program· CNA Linux

CVE-2026-93802: wifi: rsi: validate beacon length before fixed buffer copy

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 266f195d5a14eec6c482fd09fbc924584c3371a7, 66a964432b2758a4cf69962366e37581d6e70632, 795ba65f46fe44061f1195951c122cc8ec685d44; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.158.1-1.

Low priority for now. Upgrade to Linux Linux 266f195d5a14eec6c482fd09fbc924584c3371a7, 66a964432b2758a4cf69962366e37581d6e70632, 795ba65f46fe44061f1195951c122cc8ec685d44; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.158.1-1 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: rsi: validate beacon length before fixed buffer copy rsi_prepare_beacon() copies the mac80211 beacon frame after FRAME_DESC_SZ into a management skb whose usable tailroom may be smaller than MAX_MGMT_PKT_SIZE after alignment. Validate the beacon length against the actual tailroom before the copy and skb_put(). Leave ownership of the management skb with the caller on error, matching the existing rsi_send_beacon() cleanup path.

—No exploit Fix available
Published
Sep 24, 2026
Updated
Oct 3, 2026
EPSS
0.1% · 6th 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%

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  • A fix has been released

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When you'll hear from us

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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

    • 4.14affected
    • d26a9559403c7c3ec3b430f5825bc22c3d40abdb and later · before 795ba65f46fe44061f1195951c122cc8ec685d44affected · git
    • d26a9559403c7c3ec3b430f5825bc22c3d40abdb and later · before 66a964432b2758a4cf69962366e37581d6e70632affected · git
    • d26a9559403c7c3ec3b430f5825bc22c3d40abdb and later · before 7f99742c3c2801f8033d8b7a0a58254d7f24fb1eaffected · git
    • d26a9559403c7c3ec3b430f5825bc22c3d40abdb and later · before f08d7f3c916335a0e539f1c45c130615967fac47affected · git
    • d26a9559403c7c3ec3b430f5825bc22c3d40abdb and later · before 87710ad633ce4588aec88611d0d0745eb33a6991affected · git
    • d26a9559403c7c3ec3b430f5825bc22c3d40abdb and later · before 266f195d5a14eec6c482fd09fbc924584c3371a7affected · git
    • d26a9559403c7c3ec3b430f5825bc22c3d40abdb and later · before 8ecdeb8b8a33b22c597299043c0dcfce50beb9eaaffected · git
    • before 4.14not affected · semver
    • 5.10.271 and later · up to and including 5.10.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.190-16.1.190-1
Debian:12linux-6.12before 6.12.111-1~deb12u16.12.111-1~deb12u1
Debian:13linuxbefore 6.12.111-16.12.111-1
Debian:14linuxbefore 7.2.6-17.2.6-1

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-2026-93800Sep 24, 2026 · btrfs: fix use-after-free on reloc root after error in insert_dirty_subvol()
    0Monitor
  • ← EarlierCVE-2026-93801Sep 24, 2026 · smb/client: zero-initialize stack-allocated cifs_open_info_data
    28Monitor
  • Later →CVE-2026-93803Sep 24, 2026 · wifi: libipw: fix key index receive bound checks
    0Monitor

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 Linux266f195d5a14eec6c482fd09fbc924584c3371a7Vendor (CNA)
Linux Linux66a964432b2758a4cf69962366e37581d6e70632Vendor (CNA)
Linux Linux795ba65f46fe44061f1195951c122cc8ec685d44Vendor (CNA)
Linux Linux7f99742c3c2801f8033d8b7a0a58254d7f24fb1eVendor (CNA)
Linux Linux87710ad633ce4588aec88611d0d0745eb33a6991Vendor (CNA)
Linux Linux8ecdeb8b8a33b22c597299043c0dcfce50beb9eaVendor (CNA)
Linux Linuxf08d7f3c916335a0e539f1c45c130615967fac47Vendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.06.6.158.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.190-1 · Debian:12Package registry (OSV)
debian:linux6.12.111-1 · Debian:13Package registry (OSV)
debian:linux-6.126.12.111-1~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).

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✗ → ✓

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References

Show all references (6 more)

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

All records