CVE-2022-49740

Kernel memory disclosure and crash via channel count

Published Mar 27, 2025 · Updated May 11, 2026

Out-of-bounds reads in Linux kernel brcmfmac allow local users to disclose kernel memory or crash the system via device-supplied channel data. brcmf_construct_chaninfo() and brcmf_enable_bw40_2g() trust a device-reported channel count that can exceed the kzalloc-sized list->element array. Reachability requires an affected brcmfmac path and a device reporting an oversized count; the bounded consequences are kernel-memory disclosure and a system crash.

CVSS severity7.1
High
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds reads in Linux kernel brcmfmac allow local users to disclose kernel memory or crash the system via device-supplied channel data. brcmf_construct_chaninfo() and brcmf_enable_bw40_2g() trust a device-reported channel count that can exceed the kzalloc-sized list->element array. Reachability requires an affected brcmfmac path and a device reporting an oversized count; the bounded consequences are kernel-memory disclosure and a system crash.

The record

CVE
CVE-2022-49740
Published
Mar 27, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 27, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.10
  2. Affected versionversion=d48200ba45dd2edfe6286abfc783a81a4a492e98 <4920ab131b2dbae7464b72bdcac465d070254209
  3. Affected versionversion=d48200ba45dd2edfe6286abfc783a81a4a492e98 <9cf5e99c1ae1a85286a76c9a970202750538394c
  4. Affected versionversion=d48200ba45dd2edfe6286abfc783a81a4a492e98 <b2e412879595821ff1b5545cbed5f108fba7f5b6
  5. Affected versionversion=d48200ba45dd2edfe6286abfc783a81a4a492e98 <e4991910f15013db72f6ec0db7038ea67a57052e
  6. Affected versionversion=d48200ba45dd2edfe6286abfc783a81a4a492e98 <f06de1bb6d61f0c18b0213bbc6298960037f9d42

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.10; version=d48200ba45dd2edfe6286abfc783a81a4a492e98 <4920ab131b2dbae7464b72bdcac465d070254209; version=d48200ba45dd2edfe6286abfc783a81a4a492e98 <9cf5e99c1ae1a85286a76c9a970202750538394c; version=d48200ba45dd2edfe6286abfc783a81a4a492e98 <b2e412879595821ff1b5545cbed5f108fba7f5b6; version=d48200ba45dd2edfe6286abfc783a81a4a492e98 <e4991910f15013db72f6ec0db7038ea67a57052e; version=d48200ba45dd2edfe6286abfc783a81a4a492e98 <f06de1bb6d61f0c18b0213bbc6298960037f9d42

Published CVSS scores

7.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
7.1CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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