High severity · published May 28, 2026
CVE-2026-46180
wifi: brcmfmac: Fix potential use-after-free issue when stopping watchdog task
7.8
CVSS
0.1%
EPSS
No
On KEV
Description
In the Linux kernel, the following vulnerability has been resolved:
wifi: brcmfmac: Fix potential use-after-free issue when stopping watchdog task
Watchdog task might end between send_sig() and kthread_stop() calls, what
results in the use-after-free issue. Fix this by increasing watchdog task
reference count before calling send_sig() and dropping it by switching to
kthread_stop_put().
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 3% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
3.3 before 6.6.140; 6.7 before 6.12.88; 6.13 before 6.18.30; 6.19 before 7.0.7; 7.1; 7.1 · source: NVD
LI
Linux · Linux
a9ffda88be7416b8336f644806c2b3ed3ce08b26 before a21f735fb1017ef89c6f9dbf4d799513b4e7bd5a; a9ffda88be7416b8336f644806c2b3ed3ce08b26 before df2e90d6a9955510f24f1dada78cfc439fd9fa88; a9ffda88be7416b8336f644806c2b3ed3ce08b26 before d616bb10de79e5c2bd8a24230a1128aeaf715615; a9ffda88be7416b8336f644806c2b3ed3ce08b26 before ed4168d1a50fef5be8eca947fbbf05a28507d265; a9ffda88be7416b8336f644806c2b3ed3ce08b26 before d16827cb1d3936f7627d0da6044483f743ebde03; a9ffda88be7416b8336f644806c2b3ed3ce08b26 before 658d2e46c2e9a8eb9b80c5e803ce3c89885b3366; +3 more · source: vendor
SS
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem · Siemens
0 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-46180
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-46180
Patch
https://git.kernel.org/stable/c/658d2e46c2e9a8eb9b80c5e803ce3c89885b3366
Patch
https://git.kernel.org/stable/c/908b92231e1ded53e43fcfad5e0704d83e1b803c
git.kernel.org
https://git.kernel.org/stable/c/a21f735fb1017ef89c6f9dbf4d799513b4e7bd5a
Patch
https://git.kernel.org/stable/c/c623b63580880cc742255eaed3d79804c1b91143
Patch
https://git.kernel.org/stable/c/d16827cb1d3936f7627d0da6044483f743ebde03
git.kernel.org
https://git.kernel.org/stable/c/d616bb10de79e5c2bd8a24230a1128aeaf715615
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