CVE - CVE-2022-49290

CVE-ID
CVE-2022-49290	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/12e407a8ef17623823fd0c066fbd7f103953d28d URL:https://git.kernel.org/stable/c/12e407a8ef17623823fd0c066fbd7f103953d28d MISC:https://git.kernel.org/stable/c/273ebddc5fda2967492cb0b6cdd7d81cfb821b76 URL:https://git.kernel.org/stable/c/273ebddc5fda2967492cb0b6cdd7d81cfb821b76 MISC:https://git.kernel.org/stable/c/3bbd0000d012f92aec423b224784fbf0f7bf40f8 URL:https://git.kernel.org/stable/c/3bbd0000d012f92aec423b224784fbf0f7bf40f8 MISC:https://git.kernel.org/stable/c/46bb87d40683337757a2f902fcd4244b32bb4e86 URL:https://git.kernel.org/stable/c/46bb87d40683337757a2f902fcd4244b32bb4e86 MISC:https://git.kernel.org/stable/c/4a2d4496e15ea5bb5c8e83b94ca8ca7fb045e7d3 URL:https://git.kernel.org/stable/c/4a2d4496e15ea5bb5c8e83b94ca8ca7fb045e7d3 MISC:https://git.kernel.org/stable/c/582d8c60c0c053684f7138875e8150d5749ffc17 URL:https://git.kernel.org/stable/c/582d8c60c0c053684f7138875e8150d5749ffc17 MISC:https://git.kernel.org/stable/c/5d3ff9542a40ce034416bca03864709540a36016 URL:https://git.kernel.org/stable/c/5d3ff9542a40ce034416bca03864709540a36016 MISC:https://git.kernel.org/stable/c/615716af8644813355e014314a0bc1e961250f5a URL:https://git.kernel.org/stable/c/615716af8644813355e014314a0bc1e961250f5a MISC:https://git.kernel.org/stable/c/c1d9c3628ef0a0ca197595d0f9e01cd3b5dda186 URL:https://git.kernel.org/stable/c/c1d9c3628ef0a0ca197595d0f9e01cd3b5dda186
Assigning CNA
kernel.org
Date Record Created
20250226	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20250226)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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