CVE-2024-26951
wireguard: netlink: check for dangling peer via is_dead instead of empty list
Description
In the Linux kernel, the following vulnerability has been resolved: wireguard: netlink: check for dangling peer via is_dead instead of empty list If all peers are removed via wg_peer_remove_all(), rather than setting peer_list to empty, the peer is added to a temporary list with a head on the stack of wg_peer_remove_all(). If a netlink dump is resumed and the cursored peer is one that has been removed via wg_peer_remove_all(), it will iterate from that peer and then attempt to dump freed peers. Fix this by instead checking peer->is_dead, which was explictly created for this purpose. Also move up the device_update_lock lockdep assertion, since reading is_dead relies on that. It can be reproduced by a small script like: echo "Setting config..." ip link add dev wg0 type wireguard wg setconf wg0 /big-config ( while true; do echo "Showing config..." wg showconf wg0 > /dev/null done ) & sleep 4 wg setconf wg0 <(printf "[Peer]\nPublicKey=$(wg genkey)\n") Resulting in: BUG: KASAN: slab-use-after-free in __lock_acquire+0x182a/0x1b20 Read of size 8 at addr ffff88811956ec70 by task wg/59 CPU: 2 PID: 59 Comm: wg Not tainted 6.8.0-rc2-debug+ #5 Call Trace: <TASK> dump_stack_lvl+0x47/0x70 print_address_description.constprop.0+0x2c/0x380 print_report+0xab/0x250 kasan_report+0xba/0xf0 __lock_acquire+0x182a/0x1b20 lock_acquire+0x191/0x4b0 down_read+0x80/0x440 get_peer+0x140/0xcb0 wg_get_device_dump+0x471/0x1130
INFO
Published Date :
May 1, 2024, 6:15 a.m.
Last Modified :
Dec. 23, 2025, 6:55 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update the affected packages.
- Update the affected kernel package.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2024-26951.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-26951 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2024-26951
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2024-26951 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-26951 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Dec. 23, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-416 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.24 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.7.12 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.154 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.84 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.8 up to (excluding) 6.8.3 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.6 up to (excluding) 5.10.215 Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Added Reference Type kernel.org: https://git.kernel.org/stable/c/13d107794304306164481d31ce33f8fdb25a9c04 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/302b2dfc013baca3dea7ceda383930d9297d231d Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/55b6c738673871c9b0edae05d0c97995c1ff08c4 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/710a177f347282eea162aec8712beb1f42d5ad87 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/7bedfe4cfa38771840a355970e4437cd52d4046b Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/b7cea3a9af0853fdbb1b16633a458f991dde6aac Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/f52be46e3e6ecefc2539119784324f0cbc09620a Types: Patch Added Reference Type CVE: https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html Types: Third Party Advisory Added Reference Type CVE: https://git.kernel.org/stable/c/13d107794304306164481d31ce33f8fdb25a9c04 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/f52be46e3e6ecefc2539119784324f0cbc09620a Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/b7cea3a9af0853fdbb1b16633a458f991dde6aac Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/7bedfe4cfa38771840a355970e4437cd52d4046b Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/710a177f347282eea162aec8712beb1f42d5ad87 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/55b6c738673871c9b0edae05d0c97995c1ff08c4 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/302b2dfc013baca3dea7ceda383930d9297d231d Types: Patch -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/13d107794304306164481d31ce33f8fdb25a9c04 Added Reference https://git.kernel.org/stable/c/302b2dfc013baca3dea7ceda383930d9297d231d Added Reference https://git.kernel.org/stable/c/55b6c738673871c9b0edae05d0c97995c1ff08c4 Added Reference https://git.kernel.org/stable/c/710a177f347282eea162aec8712beb1f42d5ad87 Added Reference https://git.kernel.org/stable/c/7bedfe4cfa38771840a355970e4437cd52d4046b Added Reference https://git.kernel.org/stable/c/b7cea3a9af0853fdbb1b16633a458f991dde6aac Added Reference https://git.kernel.org/stable/c/f52be46e3e6ecefc2539119784324f0cbc09620a Added Reference https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Nov. 05, 2024
Action Type Old Value New Value Removed Reference kernel.org https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 25, 2024
Action Type Old Value New Value Added Reference kernel.org https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html [No types assigned] -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 29, 2024
Action Type Old Value New Value -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 14, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 01, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: wireguard: netlink: check for dangling peer via is_dead instead of empty list If all peers are removed via wg_peer_remove_all(), rather than setting peer_list to empty, the peer is added to a temporary list with a head on the stack of wg_peer_remove_all(). If a netlink dump is resumed and the cursored peer is one that has been removed via wg_peer_remove_all(), it will iterate from that peer and then attempt to dump freed peers. Fix this by instead checking peer->is_dead, which was explictly created for this purpose. Also move up the device_update_lock lockdep assertion, since reading is_dead relies on that. It can be reproduced by a small script like: echo "Setting config..." ip link add dev wg0 type wireguard wg setconf wg0 /big-config ( while true; do echo "Showing config..." wg showconf wg0 > /dev/null done ) & sleep 4 wg setconf wg0 <(printf "[Peer]\nPublicKey=$(wg genkey)\n") Resulting in: BUG: KASAN: slab-use-after-free in __lock_acquire+0x182a/0x1b20 Read of size 8 at addr ffff88811956ec70 by task wg/59 CPU: 2 PID: 59 Comm: wg Not tainted 6.8.0-rc2-debug+ #5 Call Trace: <TASK> dump_stack_lvl+0x47/0x70 print_address_description.constprop.0+0x2c/0x380 print_report+0xab/0x250 kasan_report+0xba/0xf0 __lock_acquire+0x182a/0x1b20 lock_acquire+0x191/0x4b0 down_read+0x80/0x440 get_peer+0x140/0xcb0 wg_get_device_dump+0x471/0x1130 Added Reference kernel.org https://git.kernel.org/stable/c/f52be46e3e6ecefc2539119784324f0cbc09620a [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/710a177f347282eea162aec8712beb1f42d5ad87 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/b7cea3a9af0853fdbb1b16633a458f991dde6aac [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/13d107794304306164481d31ce33f8fdb25a9c04 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/7bedfe4cfa38771840a355970e4437cd52d4046b [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/302b2dfc013baca3dea7ceda383930d9297d231d [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/55b6c738673871c9b0edae05d0c97995c1ff08c4 [No types assigned]