CVE-2022-50288

Kernel crash via qlcnic DCB use-after-free

Published Sep 15, 2025 · Updated Sep 15, 2025

Use-after-free in the qlcnic DCB path in the Linux kernel allows local users to crash the system during an allocation failure. qlcnic_dcb_enable frees adapter->dcb when qlcnic_dcb_attach returns an error, but both callers then pass that stale pointer to qlcnic_dcb_get_info. The path requires a qlcnic adapter, DCB initialization, local low-privileged access, and an out-of-memory attach failure; the documented consequence is availability loss.

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

What happened

Use-after-free in the qlcnic DCB path in the Linux kernel allows local users to crash the system during an allocation failure. qlcnic_dcb_enable frees adapter->dcb when qlcnic_dcb_attach returns an error, but both callers then pass that stale pointer to qlcnic_dcb_get_info. The path requires a qlcnic adapter, DCB initialization, local low-privileged access, and an out-of-memory attach failure; the documented consequence is availability loss.

The record

CVE
CVE-2022-50288
Published
Sep 15, 2025
Updated
Sep 15, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 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=3.14
  2. Affected versionversion=3c44bba1d270cb1620b4fe76786d0968118cb86b <13a7c8964afcd8ca43c0b6001ebb0127baa95362
  3. Affected versionversion=3c44bba1d270cb1620b4fe76786d0968118cb86b <36999236f0b12d5de21a6f40e93b570727b9ceb2
  4. Affected versionversion=3c44bba1d270cb1620b4fe76786d0968118cb86b <513787ff9a331b461115e8a145a983d650a84fcb
  5. Affected versionversion=3c44bba1d270cb1620b4fe76786d0968118cb86b <8df1dc04ce0e4c03b51a756749c250a9cb17d707
  6. Affected versionversion=3c44bba1d270cb1620b4fe76786d0968118cb86b <8f97eeb02a553cdc78c83a0596448a370e1518c4
  7. Affected versionversion=3c44bba1d270cb1620b4fe76786d0968118cb86b <95df720e64a6409d8152827a776c43f615e3321a
  8. Affected versionversion=3c44bba1d270cb1620b4fe76786d0968118cb86b <a2a694e6edbdb3efb34e1613a31fdcf6cf444a55
  9. Affected versionversion=3c44bba1d270cb1620b4fe76786d0968118cb86b <d12a7510293d3370b234b0b7c5eda33e58786768

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.14; version=3c44bba1d270cb1620b4fe76786d0968118cb86b <13a7c8964afcd8ca43c0b6001ebb0127baa95362; version=3c44bba1d270cb1620b4fe76786d0968118cb86b <36999236f0b12d5de21a6f40e93b570727b9ceb2; version=3c44bba1d270cb1620b4fe76786d0968118cb86b <513787ff9a331b461115e8a145a983d650a84fcb; version=3c44bba1d270cb1620b4fe76786d0968118cb86b <8df1dc04ce0e4c03b51a756749c250a9cb17d707; version=3c44bba1d270cb1620b4fe76786d0968118cb86b <8f97eeb02a553cdc78c83a0596448a370e1518c4; version=3c44bba1d270cb1620b4fe76786d0968118cb86b <95df720e64a6409d8152827a776c43f615e3321a; version=3c44bba1d270cb1620b4fe76786d0968118cb86b <a2a694e6edbdb3efb34e1613a31fdcf6cf444a55; version=3c44bba1d270cb1620b4fe76786d0968118cb86b <d12a7510293d3370b234b0b7c5eda33e58786768

Published CVSS scores

5.5NIST NVDCVSS: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

CWE-416Use After Free
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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