---
cve: "CVE-2026-53153"
severity: "HIGH"
cvss: 7.8
epss: "10%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-06-25 09:16:32"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-08T16:02:07+02:00"
---

# CVE-2026-53153

> 7.8 HIGH

## Beschreibung

In the Linux kernel, the following vulnerability has been resolved:

mm/list_lru: drain before clearing xarray entry on reparent

memcg_reparent_list_lrus() clears the dying memcg's xarray entry with
xas_store(&xas, NULL) before reparenting its per-node lists into the
parent.  This opens a window where a concurrent list_lru_del() arriving
for the dying memcg sees xa_load() == NULL, walks to the parent in
lock_list_lru_of_memcg(), takes the parent's per-node lock, and calls
list_del_init() on an item still physically linked on the dying memcg's
list.

If another in-flight thread holds the dying memcg's per-node lock at the
same moment (another list_lru_del, or a list_lru_walk_one running an
isolate callback), both threads modify ->next/->prev pointers on the same
physical list under different locks.  Adjacent items can corrupt each
other's links.

Fix it by reversing the order: reparent each per-node list and mark the
child's list lru dead and then clear the xarray entry.  Any concurrent
list_lru op that finds the still-set xarray entry either takes the dying
memcg's per-node lock (synchronizing with the drain) or sees LONG_MIN and
walks to the parent, where the items now live.

## 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 ≥ 6.18.36
- Kernel ≥ 7.0.13

## Referenzen

- <https://git.kernel.org/stable/c/c19ff4351214f059349788e13e70e74325831ff6>
- <https://git.kernel.org/stable/c/2b66496d794e98f7aeec7688573051f22ec40bac>
- <https://git.kernel.org/stable/c/98733f3f0becb1ae0701d021c1748e974e5fa55c>
- <https://access.redhat.com/errata/RHSA-2026:61887>
- <https://access.redhat.com/security/cve/CVE-2026-53153>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2492790>
- <https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53153.json>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-53153) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_