CVE-2022-50341

Kernel crash via cross-page signing-buffer write

Published Sep 16, 2025 · Updated Sep 16, 2025

Denial of service in Linux kernel CIFS encryption allows local users to crash an arm64 system through an encrypted SMB operation. cifs_sg_set_buf treats a vmalloc-backed signing buffer as a linear region, so scatterwalk_copychunks writes eight bytes across a page boundary. Reachability requires the CIFS client and encrypted SMB activity; the publicly demonstrated consequence is a kernel oops that interrupts the system.

CVSS severity7.8
High
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Linux kernel CIFS encryption allows local users to crash an arm64 system through an encrypted SMB operation. cifs_sg_set_buf treats a vmalloc-backed signing buffer as a linear region, so scatterwalk_copychunks writes eight bytes across a page boundary. Reachability requires the CIFS client and encrypted SMB activity; the publicly demonstrated consequence is a kernel oops that interrupts the system.

The record

CVE
CVE-2022-50341
Published
Sep 16, 2025
Updated
Sep 16, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2025Record 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a13e51760703f71c25d5fc1f4a62dfa4b0cc80e9
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <bf0543b93740916ee91956f9a63da6fc0d79daaa
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e8d16a54842d609fd4a3ed2d81d4333d6329aa94
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e8e2861cc3258dbe407d01ea8c59bb5a53132301
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f7f291e14dde32a07b1f0aa06921d28f875a7b54
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fe6ea044c4f05706cb71040055b1c70c6c8275e0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a13e51760703f71c25d5fc1f4a62dfa4b0cc80e9; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <bf0543b93740916ee91956f9a63da6fc0d79daaa; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e8d16a54842d609fd4a3ed2d81d4333d6329aa94; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e8e2861cc3258dbe407d01ea8c59bb5a53132301; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f7f291e14dde32a07b1f0aa06921d28f875a7b54; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fe6ea044c4f05706cb71040055b1c70c6c8275e0

Published CVSS scores

7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

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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