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🛡️ CVE-2026-53153 — enterprise-linux

🟠 CVSS 7.8 — High ✅ No Known Exploit CWE-820 NVD
7.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

mm/list_lru: drain before clearing xarray entry on reparent

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.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

  • Attack vector: Local — a local account, shell or session on the host is needed.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: Low — an ordinary user account is enough.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: High — total loss, or loss the attacker controls.
  • Integrity impact: High — total loss, or loss the attacker controls.
  • Availability impact: High — total loss, or loss the attacker controls.

Weakness class

CVE-2026-53153 is classified as CWE-820: Missing Synchronization. The product utilizes a shared resource in a concurrent manner but does not attempt to synchronize access to the resource.

Affected software

CVE-2026-53153 is recorded against 3 packages.

  • enterprise-linux
  • kernel (from 6.19.0 up to 7.0.13)
  • linux-kernel

Timeline and source

Published on 25 June 2026 and last revised on 15 July 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org
git.kernel.org
git.kernel.org
access.redhat.com
bugzilla.redhat.com
security.access.redhat.com

Other advisories for this package

enterprise-linux has other advisories on record. If you are patching this one, these are worth checking on the same host:

Same weakness in other software

These advisories are the same class of weakness (CWE-820: Missing Synchronization) in other software:

Details

Severity HIGH
CVSS Score 7.8
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE CWE-820
Public Exploit ✅ No
Source NVD
Published 2026-06-25
Updated 2026-08-20
Modified 2026-07-15

Affected Packages

Software From version Fixed in
enterprise-linux — —
kernel 6.19.0 7.0.13
linux-kernel — —

Similar Threats

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