VulnerabilityPublished 24 Jun 2026Updated 6 Nov 2026

CVE-2026-53093: Linux kernel · wifi: brcmfmac: Fix error pointer dereference

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in dd8592fc6007a451c3e4b9025de365e39de8178a : update Linux kernel when convenient.

Data as of 6 Nov 2026, 16:34 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch

Available – fixed in dd8592fc6007a451c3e4b9025de365e39de8178a, d3f280be48f1c672cb10e8026c236d0cca60048a, cbea71b4480394708f9a6e007a0385acfe5e1ec8 +5

Exploitation evidence

Disclosed: evidence found.
CVE published 24 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ cb7cf7be9eba76f3cd6258906074c72084570c84, < dd8592fc6007a451c3e4b9025de365e39de8178a	Fixed in dd8592fc6007a451c3e4b9025de365e39de8178a
LinuxLinux	Affected ≥ cb7cf7be9eba76f3cd6258906074c72084570c84, < d3f280be48f1c672cb10e8026c236d0cca60048a	Fixed in d3f280be48f1c672cb10e8026c236d0cca60048a
LinuxLinux	Affected ≥ cb7cf7be9eba76f3cd6258906074c72084570c84, < cbea71b4480394708f9a6e007a0385acfe5e1ec8	Fixed in cbea71b4480394708f9a6e007a0385acfe5e1ec8
LinuxLinux	Affected ≥ cb7cf7be9eba76f3cd6258906074c72084570c84, < bd6c906e0c4af6d5d0c49c3c4ee090b4913da17d	Fixed in bd6c906e0c4af6d5d0c49c3c4ee090b4913da17d
LinuxLinux	Affected ≥ cb7cf7be9eba76f3cd6258906074c72084570c84, < a3b45090a91e2f0b9715870d8f8d9ca2fdfbc1af	Fixed in a3b45090a91e2f0b9715870d8f8d9ca2fdfbc1af
LinuxLinux	Affected ≥ cb7cf7be9eba76f3cd6258906074c72084570c84, < 334c68750eee84c2327db1d152be83ff5ad8e20b	Fixed in 334c68750eee84c2327db1d152be83ff5ad8e20b

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: Fix error pointer dereference The function brcmf_chip_add_core() can return an error pointer and is not checked. Add checks for error pointer. Detected by Smatch: drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c:1010 brcmf_chip_recognition() error: 'core' dereferencing possible ERR_PTR() drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c:1013 brcmf_chip_recognition() error: 'core' dereferencing possible ERR_PTR() drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c:1016 brcmf_chip_recognition() error: 'core' dereferencing possible ERR_PTR() drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c:1019 brcmf_chip_recognition() error: 'core' dereferencing possible ERR_PTR() drivers/net/wireless/broadcom/brcm80211/brcmfmac/chip.c:1022 brcmf_chip_recognition() error: 'core' dereferencing possible ERR_PTR() [add missing wifi: prefix]

References

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