CVE-2022-50551

Kernel interruption via unchecked device chip revision

Published Oct 7, 2025 · Updated Oct 7, 2025

Out-of-bounds shift in Linux before 6.2 allows local users to interrupt the kernel through an oversized device-reported chip revision. In brcmf_fw_alloc_request(), BIT(chiprev) shifts by the unvalidated revision before intersecting the result with a 32-bit mask. Reachability requires local control of a device supplying brcmfmac metadata; no network-reachable trigger or data modification is reported.

CVSS severity7.1
High
EPSS probability0.22%
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 shift in Linux before 6.2 allows local users to interrupt the kernel through an oversized device-reported chip revision. In brcmf_fw_alloc_request(), BIT(chiprev) shifts by the unvalidated revision before intersecting the result with a 32-bit mask. Reachability requires local control of a device supplying brcmfmac metadata; no network-reachable trigger or data modification is reported.

The record

CVE
CVE-2022-50551
Published
Oct 7, 2025
Updated
Oct 7, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 7, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 7, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0b12d2aa264bac35bff9b5399bb162262b2b8949
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1db036d13e10809943c2dce553e2fa7fc9c6cd80
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4c8fc44c44b97854623c56363c359f711fc0b887
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <579c9b9838e8a73f6e93ddece07972c241514dcc
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5b06a8a25eba07628313aa3c5496522eff97be53
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <81d17f6f3331f03c8eafdacea68ab773426c1e3c
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <87792567d9ed93fd336d2c3b8d7870f44e141e6d
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9d2f70fa2c7cc6c73a420ff15682454782d3d6f6
  9. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <bc45aa1911bf699b9905f12414e3c1879d6b784f
  10. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ffb589963df103caaf062081a32db0b9e1798660

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0b12d2aa264bac35bff9b5399bb162262b2b8949; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1db036d13e10809943c2dce553e2fa7fc9c6cd80; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4c8fc44c44b97854623c56363c359f711fc0b887; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <579c9b9838e8a73f6e93ddece07972c241514dcc; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5b06a8a25eba07628313aa3c5496522eff97be53; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <81d17f6f3331f03c8eafdacea68ab773426c1e3c; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <87792567d9ed93fd336d2c3b8d7870f44e141e6d; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9d2f70fa2c7cc6c73a420ff15682454782d3d6f6; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <bc45aa1911bf699b9905f12414e3c1879d6b784f; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ffb589963df103caaf062081a32db0b9e1798660

Published CVSS scores

7.1NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.8SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.0Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/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
T1499Endpoint Denial of Service

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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