CVE-2022-50728

Local kernel panic via transmit callback mismatch

Published Dec 24, 2025 · Updated Dec 24, 2025

Incorrect callback typing in the s390 LCS driver in Linux allows local users to trigger a kernel panic or thread termination. The lcs_start_xmit function returns int although the net_device_ops ndo_start_xmit callback requires netdev_tx_t, so kCFI prototype validation rejects the indirect call. The failure requires CONFIG_CFI_CLANG and s390 architecture support for Clang kCFI; the reported consequence is limited to a panic or termination of the calling thread.

CVSS severity5.5
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect callback typing in the s390 LCS driver in Linux allows local users to trigger a kernel panic or thread termination. The lcs_start_xmit function returns int although the net_device_ops ndo_start_xmit callback requires netdev_tx_t, so kCFI prototype validation rejects the indirect call. The failure requires CONFIG_CFI_CLANG and s390 architecture support for Clang kCFI; the reported consequence is limited to a panic or termination of the calling thread.

The record

CVE
CVE-2022-50728
Published
Dec 24, 2025
Updated
Dec 24, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 24, 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 <20022d551f2064a194d8e0acb6cd7a85094a17b2
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5ad774fb823c24bbeb21a15a67103ea7a6f5b928
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <69669820844f81a77b6db24b86581320ae4d17af
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7b4da3fcd513b8e67823eb80da37aad99b3339c1
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <bb16db8393658e0978c3f0d30ae069e878264fa3
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cda74cdc280ba35c8993e7517bac5c257ff36f18
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d49cc2b705711fb8fb849e7c660929b2100360b7
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e684215d8a903752e2b0cc946517fb61e57a880a
  9. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ebc3c77785dc8b5b626309c0032a38fbb139287a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <20022d551f2064a194d8e0acb6cd7a85094a17b2; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5ad774fb823c24bbeb21a15a67103ea7a6f5b928; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <69669820844f81a77b6db24b86581320ae4d17af; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7b4da3fcd513b8e67823eb80da37aad99b3339c1; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <bb16db8393658e0978c3f0d30ae069e878264fa3; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cda74cdc280ba35c8993e7517bac5c257ff36f18; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d49cc2b705711fb8fb849e7c660929b2100360b7; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e684215d8a903752e2b0cc946517fb61e57a880a; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ebc3c77785dc8b5b626309c0032a38fbb139287a

Published CVSS scores

5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5SUSECVSS: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

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

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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

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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