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NVD / CVE Program· CNA Linux

CVE-2026-93784: wifi: cfg80211: validate IEs in cfg80211_wext_siwgenie()

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 01cc395cecfaa73134d39fb9a401d9605d8bb2c5, 269498ce6c1e2132b072aa0c8660404926008f03, 685082f4be77f4657b498ebbe9f942ef65c492cf; 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 01cc395cecfaa73134d39fb9a401d9605d8bb2c5, 269498ce6c1e2132b072aa0c8660404926008f03, 685082f4be77f4657b498ebbe9f942ef65c492cf; 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: cfg80211: validate IEs in cfg80211_wext_siwgenie() The KASAN allocation trace shows that a malformed IE buffer is stored via SIOCSIWGENIE (cfg80211_wext_siwgenie()) without any validation. The crash trace shows that a subsequent SIOCSIWESSID triggers a connection attempt which calls cfg80211_sme_get_conn_ies() to process the stored IE buffer, causing: - An out-of-bounds read in skip_ie() which reads ies[pos+1] (the length byte) past the end of the 1-byte buffer. - An integer underflow in the memcpy size argument when offs returned by ieee80211_ie_split() exceeds ies_len, causing unsigned subtraction to wrap to SIZE_MAX and triggering a fortify panic. Fix this by validating the IE buffer in cfg80211_wext_siwgenie() before storing it. [drop unnecessary ie_len check, update commit message]

—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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  • 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?

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

    • 2.6.32affected
    • f21293549f60f88c74fcb9944737f11048896dc4 and later · before 269498ce6c1e2132b072aa0c8660404926008f03affected · git
    • f21293549f60f88c74fcb9944737f11048896dc4 and later · before 685082f4be77f4657b498ebbe9f942ef65c492cfaffected · git
    • f21293549f60f88c74fcb9944737f11048896dc4 and later · before 8b921a8993469a3482e0c67b5ce5cb6ce93f5f61affected · git
    • f21293549f60f88c74fcb9944737f11048896dc4 and later · before d01f1600e8b075aa17adb751ac9881bb6ee40dccaffected · git
    • f21293549f60f88c74fcb9944737f11048896dc4 and later · before c970879e03b23a27df42caf7ba506485a165fb96affected · git
    • f21293549f60f88c74fcb9944737f11048896dc4 and later · before 01cc395cecfaa73134d39fb9a401d9605d8bb2c5affected · git
    • f21293549f60f88c74fcb9944737f11048896dc4 and later · before a2f5286ca4f304d3fd469f01b96b518608912a5caffected · git
    • before 2.6.32not 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-2026-93782Sep 24, 2026 · vhost-scsi: flush backend after device ioctls
    31Monitor
  • ← EarlierCVE-2026-93783Sep 24, 2026 · Bluetooth: RFCOMM: validate skb length in rfcomm_recv_frame
    0Monitor
  • Later →CVE-2026-93785Sep 24, 2026 · cifs: validate idmap key payload length
    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 Linux01cc395cecfaa73134d39fb9a401d9605d8bb2c5Vendor (CNA)
Linux Linux269498ce6c1e2132b072aa0c8660404926008f03Vendor (CNA)
Linux Linux685082f4be77f4657b498ebbe9f942ef65c492cfVendor (CNA)
Linux Linux8b921a8993469a3482e0c67b5ce5cb6ce93f5f61Vendor (CNA)
Linux Linuxa2f5286ca4f304d3fd469f01b96b518608912a5cVendor (CNA)
Linux Linuxc970879e03b23a27df42caf7ba506485a165fb96Vendor (CNA)
Linux Linuxd01f1600e8b075aa17adb751ac9881bb6ee40dccVendor (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