---
cve: "CVE-2024-26951"
severity: "HIGH"
cvss: 7.8
epss: "23%"
vendor: "Linux"
kev: false
exploited: false
published: "2024-05-01 06:15:11"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-10T10:57:48+02:00"
---

# CVE-2024-26951

> 7.8 HIGH

## Beschreibung

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

## CVSS-Vektor

```
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- Kernel ≥ 5.10.215
- Kernel ≥ 5.15.154
- Kernel ≥ 6.1.84
- Kernel ≥ 6.6.24
- Kernel ≥ 6.7.12
- Kernel ≥ 6.8.3

## Referenzen

- <https://git.kernel.org/stable/c/f52be46e3e6ecefc2539119784324f0cbc09620a>
- <https://git.kernel.org/stable/c/710a177f347282eea162aec8712beb1f42d5ad87>
- <https://git.kernel.org/stable/c/b7cea3a9af0853fdbb1b16633a458f991dde6aac>
- <https://git.kernel.org/stable/c/13d107794304306164481d31ce33f8fdb25a9c04>
- <https://git.kernel.org/stable/c/7bedfe4cfa38771840a355970e4437cd52d4046b>
- <https://git.kernel.org/stable/c/302b2dfc013baca3dea7ceda383930d9297d231d>
- <https://git.kernel.org/stable/c/55b6c738673871c9b0edae05d0c97995c1ff08c4>
- <https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html>
- <https://cert-portal.siemens.com/productcert/html/ssa-265688.html>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2024-26951) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_