CVE-2026-53185

Local kernel memory corruption via asynchronous zram read

Published Jun 25, 2026 · Updated Jun 25, 2026

Use-after-free in Linux Kernel zram allows local users to corrupt kernel memory through partial writes to writeback-backed slots. zram_bvec_write_partial() passes its parent bio to zram_read_page(), which returns before an asynchronous ZRAM_WB read finishes; the caller then frees the destination page. Exploitation requires local low-privileged access, an active zram backing device, a ZRAM_WB slot, and a partial write; the stale read then writes into freed kernel memory.

CVSS severity7.8
High
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux Kernel zram allows local users to corrupt kernel memory through partial writes to writeback-backed slots. zram_bvec_write_partial() passes its parent bio to zram_read_page(), which returns before an asynchronous ZRAM_WB read finishes; the caller then frees the destination page. Exploitation requires local low-privileged access, an active zram backing device, a ZRAM_WB slot, and a partial write; the stale read then writes into freed kernel memory.

The record

CVE
CVE-2026-53185
Published
Jun 25, 2026
Updated
Jun 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416, CWE-364, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.14
  2. Affected versionversion=8e654f8fbff52ac483fb69957222853d7e2fc588 <0c2821665ff71be3f4b07ecece384669f2877f6a
  3. Affected versionversion=8e654f8fbff52ac483fb69957222853d7e2fc588 <198b5a14cca27263b9c14b20114c8092de15dfcb
  4. Affected versionversion=8e654f8fbff52ac483fb69957222853d7e2fc588 <732fd9f0b9c1cdc6dfd77162ded60df005182cc0
  5. Affected versionversion=8e654f8fbff52ac483fb69957222853d7e2fc588 <77a602b505ce4802915853cfc435a4722fab3e64
  6. Affected versionversion=8e654f8fbff52ac483fb69957222853d7e2fc588 <c96786d6ff1acc1d54d9241e97767554c1dfdd5b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4.14; version=8e654f8fbff52ac483fb69957222853d7e2fc588 <0c2821665ff71be3f4b07ecece384669f2877f6a; version=8e654f8fbff52ac483fb69957222853d7e2fc588 <198b5a14cca27263b9c14b20114c8092de15dfcb; version=8e654f8fbff52ac483fb69957222853d7e2fc588 <732fd9f0b9c1cdc6dfd77162ded60df005182cc0; version=8e654f8fbff52ac483fb69957222853d7e2fc588 <77a602b505ce4802915853cfc435a4722fab3e64; version=8e654f8fbff52ac483fb69957222853d7e2fc588 <c96786d6ff1acc1d54d9241e97767554c1dfdd5b

Published CVSS scores

7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.0Red Hat Product SecurityCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
CWE-364Signal Handler Race Condition
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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