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NVD / CVE Program· CNA Linux

CVE-2026-93807: wifi: rsi: avoid reading TKIP MIC keys for non-TKIP ciphers

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 5207727e53fba1e3a6fce9b2c15b6b8b06c6438b, 55b86ef6c2e68879ffd95203b011ef42a013ab88, 5902e3c08c63d65724772f74d65b9fb032625dca; 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 5207727e53fba1e3a6fce9b2c15b6b8b06c6438b, 55b86ef6c2e68879ffd95203b011ef42a013ab88, 5902e3c08c63d65724772f74d65b9fb032625dca; 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: avoid reading TKIP MIC keys for non-TKIP ciphers rsi_hal_load_key() copies tx_mic_key and rx_mic_key from data[16] and data[24] whenever key data is present. Those offsets are only part of the 32-byte TKIP key layout. Shorter keys used by other ciphers, such as CCMP, do not provide those bytes, so the unconditional copies can read past the supplied key buffer. Only copy the MIC keys for TKIP, and reject malformed TKIP keys that are shorter than the expected 32-byte layout. [drop useless length check]

—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%

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

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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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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

    • 3.15affected
    • dad0d04fa7ba41ce603a01e8e64967650303e9a2 and later · before 6937b06d55b528e961feff8cc083b97ede622e02affected · git
    • dad0d04fa7ba41ce603a01e8e64967650303e9a2 and later · before ebd7172f8c4edc232738ef50338fb773c6f6c208affected · git
    • dad0d04fa7ba41ce603a01e8e64967650303e9a2 and later · before 6b6690ac5c35e803df14afdc44312d11e8a60893affected · git
    • dad0d04fa7ba41ce603a01e8e64967650303e9a2 and later · before 5207727e53fba1e3a6fce9b2c15b6b8b06c6438baffected · git
    • dad0d04fa7ba41ce603a01e8e64967650303e9a2 and later · before 5902e3c08c63d65724772f74d65b9fb032625dcaaffected · git
    • dad0d04fa7ba41ce603a01e8e64967650303e9a2 and later · before 55b86ef6c2e68879ffd95203b011ef42a013ab88affected · git
    • dad0d04fa7ba41ce603a01e8e64967650303e9a2 and later · before 843fe9bc583b7686ca68312ac9319c9240a73c03affected · git
    • before 3.15not 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-2026-93805Sep 24, 2026 · wifi: cfg80211: validate rx/tx MLME callback frame lengths before access
    0Monitor
  • ← EarlierCVE-2026-93806Sep 24, 2026 · wifi: cfg80211: validate assoc response length before status and IE access
    35Monitor
  • Later →CVE-2026-93808Sep 24, 2026 · ALSA: usb-audio: caiaq: validate EP1 reply lengths
    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 Linux5207727e53fba1e3a6fce9b2c15b6b8b06c6438bVendor (CNA)
Linux Linux55b86ef6c2e68879ffd95203b011ef42a013ab88Vendor (CNA)
Linux Linux5902e3c08c63d65724772f74d65b9fb032625dcaVendor (CNA)
Linux Linux6937b06d55b528e961feff8cc083b97ede622e02Vendor (CNA)
Linux Linux6b6690ac5c35e803df14afdc44312d11e8a60893Vendor (CNA)
Linux Linux843fe9bc583b7686ca68312ac9319c9240a73c03Vendor (CNA)
Linux Linuxebd7172f8c4edc232738ef50338fb773c6f6c208Vendor (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