CVE-2022-49339

MEDIUM EPSS 17.6%
Published Feb 26, 20251y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Feb 26, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: net: ipv6: unexport __init-annotated seg6_hmac_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 caller (net/ipv6/seg6.c) and the callee (net/ipv6/seg6_hmac.c) belong to the same module. It seems an internal function call in ipv6.ko.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
17.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 8

VendorProductVersionRange
linuxlinux_kernel*≥4.10  –  <4.14.283
linuxlinux_kernel*≥4.15  –  <4.19.247
linuxlinux_kernel*≥4.20  –  <5.4.198
linuxlinux_kernel*≥5.5  –  <5.10.122
linuxlinux_kernel*≥5.11  –  <5.15.47
linuxlinux_kernel*≥5.16  –  <5.17.15
linuxlinux_kernel*≥5.18  –  <5.18.4
linuxlinux_kernel5.19any

References 8

  • git.kernel.org https://git.kernel.org/stable/c/1084716f76c8045eadf92a9d9a62641f3c8d8c90
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/317260b3eb6384a05a8af212308fa50f3b2e8290
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3e6de5037148c5a93a436b1e8d2edad3dac11755
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5801f064e35181c71857a80ff18af4dbec3c5f5c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5d9c1b081ad28c852a97e10dd75412546497694a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/64aef8efe96c1616142c4476a05731306fc4494e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9ba4416b831eeb4d185e88e73488d1d21288e63a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ab8b2c2de273ec1d698a18e399896a6febb5cda0
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/1084716f76c8045eadf92a9d9a62641f3c8d8c90
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/317260b3eb6384a05a8af212308fa50f3b2e8290
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3e6de5037148c5a93a436b1e8d2edad3dac11755
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5801f064e35181c71857a80ff18af4dbec3c5f5c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5d9c1b081ad28c852a97e10dd75412546497694a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/64aef8efe96c1616142c4476a05731306fc4494e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/9ba4416b831eeb4d185e88e73488d1d21288e63a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ab8b2c2de273ec1d698a18e399896a6febb5cda0
    Patch