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CVE-2026-46180— wifi: brcmfmac: Fix potential use-after-free issue when stopping watchdog task

AI Predicted 4.7 Difficulty: Theoretical EPSS 0.02% · P5

Possible ATT&CK Techniques 1AI

T1211 · Exploitation for Stealth

Affected Version Matrix 12

VendorProductVersion RangeStatus
LinuxLinuxa9ffda88be7416b8336f644806c2b3ed3ce08b26< ed4168d1a50fef5be8eca947fbbf05a28507d265affected
a9ffda88be7416b8336f644806c2b3ed3ce08b26< d16827cb1d3936f7627d0da6044483f743ebde03affected
a9ffda88be7416b8336f644806c2b3ed3ce08b26< 658d2e46c2e9a8eb9b80c5e803ce3c89885b3366affected
a9ffda88be7416b8336f644806c2b3ed3ce08b26< 908b92231e1ded53e43fcfad5e0704d83e1b803caffected
a9ffda88be7416b8336f644806c2b3ed3ce08b26< c623b63580880cc742255eaed3d79804c1b91143affected
3.3affected
< 3.3unaffected
6.6.140≤ 6.6.*unaffected
… +4 more rows
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I. Basic Information for CVE-2026-46180

Vulnerability Information
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Vulnerability Title
wifi: brcmfmac: Fix potential use-after-free issue when stopping watchdog task
Source: NVD (National Vulnerability Database)
Vulnerability 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().
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于brcmfmac停止看门狗任务时存在释放后重用问题，可能导致释放后重用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux a9ffda88be7416b8336f644806c2b3ed3ce08b26 ~ ed4168d1a50fef5be8eca947fbbf05a28507d265 -
LinuxLinux 3.3 -

II. Public POCs for CVE-2026-46180

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III. Intelligence Information for CVE-2026-46180

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Patches & Fixes for CVE-2026-46180 (4)

Same Patch Batch · Linux · 2026-05-28 · 138 CVEs total

CVE-2026-461359.8 CRITICALnvmet-tcp: fix race between ICReq handling and queue teardown
CVE-2026-461379.8 CRITICALmptcp: pm: ADD_ADDR rtx: fix potential data-race
CVE-2026-461959.8 CRITICALsmb: client: validate dacloffset before building DACL pointers
CVE-2026-461159.8 CRITICALblock: add pgmap check to biovec_phys_mergeable
CVE-2026-461199.1 CRITICALlibceph: Fix slab-out-of-bounds access in auth message processing
CVE-2026-461859.1 CRITICALsmb/client: fix out-of-bounds read in symlink_data()
CVE-2026-461559.1 CRITICALsmb/client: fix out-of-bounds read in smb2_compound_op()
CVE-2026-461988.8 HIGHbatman-adv: fix integer overflow on buff_pos
CVE-2026-462128.8 HIGHbatman-adv: bla: prevent use-after-free when deleting claims
CVE-2026-461748.8 HIGHx86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache
CVE-2026-461528.8 HIGHwifi: mac80211: drop stray 'static' from fast-RX rx_result
CVE-2026-462388.8 HIGHbatman-adv: stop caching unowned originator pointers in BAT IV
CVE-2026-461258.8 HIGHwifi: mac80211: remove station if connection prep fails
CVE-2026-461668.8 HIGHwifi: mac80211: use safe list iteration in radar detect work
CVE-2026-461138.8 HIGHKVM: x86: Fix shadow paging use-after-free due to unexpected GFN
CVE-2026-461388.1 HIGHBluetooth: hci_event: Fix OOB read and infinite loop in hci_le_create_big_complete_evt
CVE-2026-462328.1 HIGHHID: playstation: Clamp num_touch_reports
CVE-2026-461457.8 HIGHRDMA/mana: Validate rx_hash_key_len
CVE-2026-462017.8 HIGHdrm/xe: Fix dma-buf attachment leak in xe_gem_prime_import()
CVE-2026-461817.8 HIGHRDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event()

Showing top 20 of 138 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-46180

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