High

CVE-2026-43052 — wifi: mac80211: check tdls flag in ieee80211_tdls_oper

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: check tdls flag in ieee80211_tdls_oper When NL80211_TDLS_ENABLE_LINK is called, the code only checks if the station exists but not whether it is actually a TDLS station. This allows the operation to proceed for non-TDLS stations, causing unintended side effects like modifying channel context and HT protection before failing. Add a check for sta->sta.tdls early in the ENABLE_LINK case, before any side effects occur, to ensure the operation is only allowed for actual TDLS peers.

Published May 1, 2026 · Updated Oct 14, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP, GitHub Security Advisories · CNA: Linux

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.2% (30-day exploitation probability)+1
Technical severity (high)+6

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.18%

ahead of 7% of scored CVEs · Oct 15, 2026

Affects

Linux

Linux and 1 more

CVSS base

7.1

High · 2 source(s)

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

Documented patch — git.kernel.org (NIST National Vulnerability Database)
Documented patch — git.kernel.org (NIST National Vulnerability Database)
Documented patch — git.kernel.org (NIST National Vulnerability Database)
Documented patch — git.kernel.org (NIST National Vulnerability Database)

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Linux Linux, Linux Linux Kernel).
Apply the fixed version or the patch documented under Remediation.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Linux	Linux	≥ 941c93cd039852b7ab02c74f4698c99d82bd6cfe and < e602246235fc2ef06c39b2e9cf147d84d0896b73≥ 941c93cd039852b7ab02c74f4698c99d82bd6cfe and < 6813a8b1b240756dad4375f3e020ce10e4e3871b≥ 941c93cd039852b7ab02c74f4698c99d82bd6cfe and < 44839ea7e96b3659a1606f3d5267063135479b7c≥ 941c93cd039852b7ab02c74f4698c99d82bd6cfe and < ba5b43db126a5e7378553869e3f7954d9187349f≥ 941c93cd039852b7ab02c74f4698c99d82bd6cfe and < 8148c2fda4ebb17104a573649c9b699208ad10ee≥ 941c93cd039852b7ab02c74f4698c99d82bd6cfe and < be81f17151fcb8546a95f35ca8f4231b065985de≥ 941c93cd039852b7ab02c74f4698c99d82bd6cfe and < e77b2937aaa20264e4bd699d3244bdb50e7e3343≥ 941c93cd039852b7ab02c74f4698c99d82bd6cfe and < 7d73872d949c488a1d7c308031d6a9d89b5e0a8b and 1 more version 3.2	Vulnerable	CVE Program (cve.org) e CISA ADP
Linux	Linux Kernel	≥ 3.2 and < 6.12.81≥ 6.13 and < 6.18.22≥ 6.19 and < 6.19.12version 7.0-rc1version 7.0-rc2version 7.0-rc3version 7.0-rc4	Vulnerable	NIST National Vulnerability Database

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Local

Attack complexity

Low

Privileges required

Low

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
7.1	CVSS 3.1	High	1.8	5.2	nvd@nist.gov via NIST National Vulnerability Database
7.1	CVSS 3.1	High	—	—	GitHub, Inc. via GitHub Security Advisories

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H (score shown at the top: nvd@nist.gov)

EPSS over time FIRST

Oct 13, 2026 → Oct 15, 2026 · 3 reading(s) · max 0.18%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.

endpoint telemetry (EDR)

Timeline

What happened to this CVE, newest first.

2026
Affected products added · linux/linux
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 13, 2026
Fix documented
Oct 13, 2026 · NIST National Vulnerability Database
CVSS changed · 7.1
Oct 13, 2026 · NIST National Vulnerability Database
Source status changed · → Modified
Oct 13, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 13, 2026 · NIST National Vulnerability Database
CVE published
May 1, 2026 · Linux

Source activity

Repeated readings are counted rather than listed.

2× References added · Oct 14, 2026 – Oct 14, 2026
1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

11 on the record

git.kernel.org/stable/c/be81f17151fcb8546a95f35ca8f4231b065985de
Patch, NIST National Vulnerability Database
git.kernel.org/stable/c/7d73872d949c488a1d7c308031d6a9d89b5e0a8b
Patch, NIST National Vulnerability Database
git.kernel.org/stable/c/8148c2fda4ebb17104a573649c9b699208ad10ee
Patch, NIST National Vulnerability Database
git.kernel.org/stable/c/e77b2937aaa20264e4bd699d3244bdb50e7e3343
Patch, NIST National Vulnerability Database
git.kernel.org/stable/c/44839ea7e96b3659a1606f3d5267063135479b7c
NIST National Vulnerability Database
git.kernel.org/stable/c/e602246235fc2ef06c39b2e9cf147d84d0896b73
NIST National Vulnerability Database
git.kernel.org/stable/c/ba5b43db126a5e7378553869e3f7954d9187349f
NIST National Vulnerability Database
git.kernel.org/stable/c/6813a8b1b240756dad4375f3e020ce10e4e3871b
NIST National Vulnerability Database
cert-portal.siemens.com/productcert/html/ssa-784472.html
NIST National Vulnerability Database
nvd.nist.gov/vuln/detail/CVE-2026-43052
GitHub Security Advisories
github.com/advisories/GHSA-j5xm-hgh6-vq4q
GitHub Security Advisories

Elsewhere on this site

Linux
every CVE for this vendor

Related CVEs (same products)

Critical CVE-2026-99999 ipv4: validate checksum_start before completing checksum 15h
Unknown CVE-2026-98432 ipv4: free inet_opt and ireq_opt after an RCU grace period 15h
Unknown CVE-2026-98424 wifi: cfg80211: undo netns switch if renaming the wiphy fails 1d
Unknown CVE-2026-98425 wifi: mac80211: don't warn when an IBSS has no channel to scan 1d
Unknown CVE-2026-98426 wifi: mwifiex: fix IRQ leak using wrong index in MSI-X error path 1d
Unknown CVE-2026-98427 net/sched: codel: bound the dropping loop per dequeue call 1d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No CISA SSVC assessment.
No CWE classification.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-43052 is "wifi: mac80211: check tdls flag in ieee80211_tdls_oper", rated High. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 7.1 describes technical severity. EPSS 0.18% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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