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CVE-2026-53185

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: zram: fix use-after-free in zram_bvec_write_partial() zram_read_page() picks the sync or async backing device read path based o…

Published Jun 25, 2026CWE-416EPSS 0.11%

Overview

CVE-2026-53185 is a high-severity vulnerability. It was published on June 25, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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

zram: fix use-after-free in zram_bvec_write_partial()

zram_read_page() picks the sync or async backing device read path based on

whether the parent bio is NULL. zram_bvec_write_partial() passes its

parent bio down, so for ZRAM_WB slots the read is dispatched

asynchronously and zram_read_page() returns 0 while the bio is still in

flight. The caller then runs memcpy_from_bvec(), zram_write_page() and

__free_page() on the buffer, leaving the async read to write into a freed

page.

zram_bvec_read_partial() was switched to NULL in commit 4e3c87b9421d

("zram: fix synchronous reads") for the same reason; the write_partial

counterpart was missed.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/0c2821665ff71be3f4b07ecece384669f2877f6aRefgit.kernel.org/stable/c/198b5a14cca27263b9c14b20114c8092de15dfcbRefgit.kernel.org/stable/c/732fd9f0b9c1cdc6dfd77162ded60df005182cc0Refgit.kernel.org/stable/c/77a602b505ce4802915853cfc435a4722fab3e64Refgit.kernel.org/stable/c/c96786d6ff1acc1d54d9241e97767554c1dfdd5bRefaccess.redhat.com/errata/RHSA-2026:59723Refaccess.redhat.com/security/cve/CVE-2026-53185Refbugzilla.redhat.com/show_bug.cgi?id=2492735Refsecurity.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53185.json

How CyberStrike helps

Frequently asked questions

What is CVE-2026-53185?

CVE-2026-53185 is a high-severity vulnerability. It was published on June 25, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-53185?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-53185?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-53185?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-53185 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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