CVE-2022-49114

Kernel compromise via libfc exchange use-after-free

Published Feb 26, 2025 · Updated Aug 5, 2026

Use-after-free in the Linux kernel libfc subsystem allows adjacent attackers to compromise a host through crafted FC/FCoE responses. In fc_exch_abts_resp(), fc_exch_release() can free the exchange after decrementing its final reference, but execution continues and accesses the freed object. Reachability requires a configured initiator on the same FC fabric or FCoE VLAN; successful exploitation enables kernel-memory access or control-flow hijacking, while an unsuccessful attempt can panic the host.

CVSS severity8.8
High
EPSS probability0.36%
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 Linux kernel libfc subsystem allows adjacent attackers to compromise a host through crafted FC/FCoE responses. In fc_exch_abts_resp(), fc_exch_release() can free the exchange after decrementing its final reference, but execution continues and accesses the freed object. Reachability requires a configured initiator on the same FC fabric or FCoE VLAN; successful exploitation enables kernel-memory access or control-flow hijacking, while an unsuccessful attempt can panic the host.

The record

CVE
CVE-2022-49114
Published
Feb 26, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1210
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=2.6.29
  2. Affected versionversion=42e9a92fe6a9095bd68a379aaec7ad2be0337f7a <1d7effe5fff9d28e45e18ac3a564067c7ddfe898
  3. Affected versionversion=42e9a92fe6a9095bd68a379aaec7ad2be0337f7a <271add11994ba1a334859069367e04d2be2ebdd4
  4. Affected versionversion=42e9a92fe6a9095bd68a379aaec7ad2be0337f7a <412dd8299b02e4410fe77b8396953c1a8dde183a
  5. Affected versionversion=42e9a92fe6a9095bd68a379aaec7ad2be0337f7a <499d198494e77b6533251b9b909baf5c101129cb
  6. Affected versionversion=42e9a92fe6a9095bd68a379aaec7ad2be0337f7a <4a131d4ea8b581ac9b01d3a72754db4848be3232
  7. Affected versionversion=42e9a92fe6a9095bd68a379aaec7ad2be0337f7a <5cf2ce8967b0d98c8cfa4dc42ef4fcf080f5c836
  8. Affected versionversion=42e9a92fe6a9095bd68a379aaec7ad2be0337f7a <6044ad64f41c87382cfeeca281573d1886d80cbe
  9. Affected versionversion=42e9a92fe6a9095bd68a379aaec7ad2be0337f7a <87909291762d08fdb60d19069d7a89b5b308d0ef
  10. Affected versionversion=42e9a92fe6a9095bd68a379aaec7ad2be0337f7a <f581df412bc45c95176e3c808ee2839c05b2ab0c

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.29; version=42e9a92fe6a9095bd68a379aaec7ad2be0337f7a <1d7effe5fff9d28e45e18ac3a564067c7ddfe898; version=42e9a92fe6a9095bd68a379aaec7ad2be0337f7a <271add11994ba1a334859069367e04d2be2ebdd4; version=42e9a92fe6a9095bd68a379aaec7ad2be0337f7a <412dd8299b02e4410fe77b8396953c1a8dde183a; version=42e9a92fe6a9095bd68a379aaec7ad2be0337f7a <499d198494e77b6533251b9b909baf5c101129cb; version=42e9a92fe6a9095bd68a379aaec7ad2be0337f7a <4a131d4ea8b581ac9b01d3a72754db4848be3232; version=42e9a92fe6a9095bd68a379aaec7ad2be0337f7a <5cf2ce8967b0d98c8cfa4dc42ef4fcf080f5c836; version=42e9a92fe6a9095bd68a379aaec7ad2be0337f7a <6044ad64f41c87382cfeeca281573d1886d80cbe; version=42e9a92fe6a9095bd68a379aaec7ad2be0337f7a <87909291762d08fdb60d19069d7a89b5b308d0ef; version=42e9a92fe6a9095bd68a379aaec7ad2be0337f7a <f581df412bc45c95176e3c808ee2839c05b2ab0c

Published CVSS scores

8.8Linux Kernel CVE TeamCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.8CISA ADP VulnrichmentCVSS:3.1/AV:L/AC:L/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.

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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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1210Exploitation of Remote Services

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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