7.8

CVE-2022-49290: mac80211: fix potential double free on mesh join

Modified
AliasesUBUNTU-CVE-2022-49290DEBIAN-CVE-2022-49290
Published 26-02-2025Last modified 05-08-2026

Vulnerability summary

CVE-2022-49290 is a high (CVSS 7.8) Double Free vulnerability in linux. EPSS estimates a 0.26% chance of exploitation in the next 30 days, higher than 17.6% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.26%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 13 · Related 7
RHSA-2022:7683RHSA-2022:8267RHSA-2026:1442RHSA-2026:1494RHSA-2026:1495RHSA-2026:1886

Timeline

  1. 26-02-2025
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

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 metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.26%

Chance of exploitation in the next 30 days

Percentile

18%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.26% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu106 products
  • linuxAll versions (No fix recorded) | < 4.15.0-184.194 | < 5.4.0-117.132 | < 5.15.0-37.39
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 4.15.0-1133.143 | < 5.4.0-1078.84 | < 5.15.0-1011.14
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 3212d6248faf0efce6b7a718e198feecce0eea05, < 615716af8644813355e014314a0bc1e961250f5a | ≥ 86e7d4cd2ed5f4b0188afce8199faffcf1ae7c7e, < c1d9c3628ef0a0ca197595d0f9e01cd3b5dda186 | ≥ 37bccfa89559a70c044b5ccde3c916a91388e14a, < 273ebddc5fda2967492cb0b6cdd7d81cfb821b76 | ≥ 3f15e3e62c80e180282f0cbc5559264e11c328b7, < 3bbd0000d012f92aec423b224784fbf0f7bf40f8 | ≥ 6a01afcf8468d3ca2bd8bbb27503f60dcf643b20, < 5d3ff9542a40ce034416bca03864709540a36016 | ≥ 6a01afcf8468d3ca2bd8bbb27503f60dcf643b20, < 12e407a8ef17623823fd0c066fbd7f103953d28d | ≥ 6a01afcf8468d3ca2bd8bbb27503f60dcf643b20, < 582d8c60c0c053684f7138875e8150d5749ffc17 | ≥ 6a01afcf8468d3ca2bd8bbb27503f60dcf643b20, < 46bb87d40683337757a2f902fcd4244b32bb4e86 | ≥ 6a01afcf8468d3ca2bd8bbb27503f60dcf643b20, < 4a2d4496e15ea5bb5c8e83b94ca8ca7fb045e7d3 | 12e9cb1e7c93413112260991d094cfda712fdc97 | 4f3193e08602462a806e8f53212e79c60a6f7488 | ≥ 4.9.233, < 4.9.309 | ≥ 4.14.192, < 4.14.274 | ≥ 4.19.137, < 4.19.237 | ≥ 5.4.56, < 5.4.188 | ≥ 4.4.233, < 4.5 | ≥ 5.7.13, < 5.8 | 5.8
  • linux_kernel≥ 4.4.233, < 4.5 | ≥ 4.9.233, < 4.9.309 | ≥ 4.14.192, < 4.14.274 | ≥ 4.19.137, < 4.19.237 | ≥ 5.4.56, < 5.4.188 | ≥ 5.7.13, < 5.10.109 | ≥ 5.11, < 5.15.32 | ≥ 5.16, < 5.16.18 | ≥ 5.17, < 5.17.1
Debian1 product
  • linux< 5.17.3-1

3 vendors · 109 products

References

13 links
Show all 13 references