Riskcovery

CVE-2022-49345

net: xfrm: unexport __init-annotated xfrm4_protocol_init()

State
Published
Severity
Not scored
Published
Feb 26, 2025
Updated
May 11, 2026
Reserved
Feb 26, 2025

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

net: xfrm: unexport __init-annotated xfrm4_protocol_init()

EXPORT_SYMBOL and __init is a bad combination because the .init.text section is freed up after the initialization. Hence, modules cannot use symbols annotated __init. The access to a freed symbol may end up with kernel panic.

modpost used to detect it, but it has been broken for a decade.

Recently, I fixed modpost so it started to warn it again, then this showed up in linux-next builds.

There are two ways to fix it:

- Remove __init - Remove EXPORT_SYMBOL

I chose the latter for this case because the only in-tree call-site, net/ipv4/xfrm4_policy.c is never compiled as modular. (CONFIG_XFRM is boolean)

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 2f32b51b609faea1e40bb8c5bd305f1351740936 to before c58d82a1264813e69119c13e9804e2e60b664ad5Affected
  • 2f32b51b609faea1e40bb8c5bd305f1351740936 to before e53cd3814504b2cadaba4d5a8a07eeea9ddacd03Affected
  • 2f32b51b609faea1e40bb8c5bd305f1351740936 to before 31f3c6a4dcd3260a386e62cef2d5b36e902600a1Affected
  • 2f32b51b609faea1e40bb8c5bd305f1351740936 to before ef6d2354de238b065d8799c80da4be9a6af18e39Affected
  • 2f32b51b609faea1e40bb8c5bd305f1351740936 to before be3884d5cd04ccd58294b83a02d70b7c5fca19d3Affected
  • 2f32b51b609faea1e40bb8c5bd305f1351740936 to before 85a055c03691e51499123194a14a0c249cf33227Affected
  • 2f32b51b609faea1e40bb8c5bd305f1351740936 to before e04d59cfe0c0129df7aba7ef7bb17b96be2a64f2Affected
  • 2f32b51b609faea1e40bb8c5bd305f1351740936 to before 2b253fbc9f7b5db18d716436bdcf8ecef09fd63dAffected
  • 2f32b51b609faea1e40bb8c5bd305f1351740936 to before 4a388f08d8784af48f352193d2b72aaf167a57a1Affected
LinuxLinux
  • 3.15Affected
  • before 3.15Not affected
  • 4.9.318 through 4.9.*Not affected
  • 4.14.283 through 4.14.*Not affected
  • 4.19.247 through 4.19.*Not affected
  • 5.4.198 through 5.4.*Not affected
  • 5.10.122 through 5.10.*Not affected
  • 5.15.47 through 5.15.*Not affected
  • 5.17.15 through 5.17.*Not affected
  • 5.18.4 through 5.18.*Not affected
  • 5.19 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.