CVE-2022-49290

HIGH EPSS 13.3%
Published Feb 26, 20251y ago · Modified Jun 17, 20262w ago
7.8 CVSS 3.1
High
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Published Feb 26, 2025 1y ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: mac80211: fix potential double free on mesh join While commit 6a01afcf8468 ("mac80211: mesh: Free ie data when leaving mesh") fixed a memory leak on mesh leave / teardown it introduced a potential memory corruption caused by a double free when rejoining the mesh: ieee80211_leave_mesh() -> kfree(sdata->u.mesh.ie); ... ieee80211_join_mesh() -> copy_mesh_setup() -> old_ie = ifmsh->ie; -> kfree(old_ie); This double free / kernel panics can be reproduced by using wpa_supplicant with an encrypted mesh (if set up without encryption via "iw" then ifmsh->ie is always NULL, which avoids this issue). And then calling: $ iw dev mesh0 mesh leave $ iw dev mesh0 mesh join my-mesh Note that typically these commands are not used / working when using wpa_supplicant. And it seems that wpa_supplicant or wpa_cli are going through a NETDEV_DOWN/NETDEV_UP cycle between a mesh leave and mesh join where the NETDEV_UP resets the mesh.ie to NULL via a memcpy of default_mesh_setup in cfg80211_netdev_notifier_call, which then avoids the memory corruption, too. The issue was first observed in an application which was not using wpa_supplicant but "Senf" instead, which implements its own calls to nl80211. Fixing the issue by removing the kfree()'ing of the mesh IE in the mesh join function and leaving it solely up to the mesh leave to free the mesh IE.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
13.3% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-415

Affected Products 9

VendorProductVersionRange
linuxlinux_kernel*≥4.4.233  –  <4.5
linuxlinux_kernel*≥4.9.233  –  <4.9.309
linuxlinux_kernel*≥4.14.192  –  <4.14.274
linuxlinux_kernel*≥4.19.137  –  <4.19.237
linuxlinux_kernel*≥5.4.56  –  <5.4.188
linuxlinux_kernel*≥5.7.13  –  <5.10.109
linuxlinux_kernel*≥5.11  –  <5.15.32
linuxlinux_kernel*≥5.16  –  <5.16.18
linuxlinux_kernel*≥5.17  –  <5.17.1

References 9

  • git.kernel.org https://git.kernel.org/stable/c/12e407a8ef17623823fd0c066fbd7f103953d28d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/273ebddc5fda2967492cb0b6cdd7d81cfb821b76
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3bbd0000d012f92aec423b224784fbf0f7bf40f8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/46bb87d40683337757a2f902fcd4244b32bb4e86
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4a2d4496e15ea5bb5c8e83b94ca8ca7fb045e7d3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/582d8c60c0c053684f7138875e8150d5749ffc17
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5d3ff9542a40ce034416bca03864709540a36016
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/615716af8644813355e014314a0bc1e961250f5a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c1d9c3628ef0a0ca197595d0f9e01cd3b5dda186
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/12e407a8ef17623823fd0c066fbd7f103953d28d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/273ebddc5fda2967492cb0b6cdd7d81cfb821b76
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3bbd0000d012f92aec423b224784fbf0f7bf40f8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/46bb87d40683337757a2f902fcd4244b32bb4e86
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4a2d4496e15ea5bb5c8e83b94ca8ca7fb045e7d3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/582d8c60c0c053684f7138875e8150d5749ffc17
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5d3ff9542a40ce034416bca03864709540a36016
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/615716af8644813355e014314a0bc1e961250f5a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c1d9c3628ef0a0ca197595d0f9e01cd3b5dda186
    Patch