What is CVE-2026-53160?

CVE-2026-53160 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, classified as a Use After Free flaw (CWE-416), affecting Linux kernel versions from 6.1.156 onward and patched in 6.1.176, 6.6.143, 6.12.94 and others. CVE-2026-53160 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-53160?

CVE-2026-53160 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2026-53160?

Yes, CVE-2026-53160 has been patched. Fixed versions include 6.1.176, 6.6.143, 6.12.94 and others. If you are running Linux kernel 6.1.156 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-53160 actively exploited?

CVE-2026-53160 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/416.html

CVE-2026-53160

High

In the Linux kernel, the following vulnerability has been resolved: misc: fastrpc: fix use-after-free race in fastrpc_map_create fastrpc_map_lookup returns a raw pointer after releasing fl->lock. The caller fastrpc_map_create then calls fastrpc_map_get (kref_get_unless_zero) on this unprotected pointer. A concurrent MEM_UNMAP can free the map between the lock release and the kref operation, resulting in a use-after-free on the freed slab object. Restore the take_ref parameter to fastrpc_map_lookup so the reference is acquired atomically under fl->lock before the pointer is exposed to the caller.

Package Linux Kernel

Published 2026-06-25

Last modified 2026-07-06

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-416

CVE-2026-53160 is a Use After Free vulnerability

What is Use After Free?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. Learn more on MITRE CWE

Affected versions

Linux kernel versions 6.1.156, 6.6.112, 6.12.53, 6.17.3, 6.18 and later are affected. Fixed in 6.1.176, 6.6.143, 6.12.94, 6.18.36, 7.0.13, 7.1 and their respective stable series.

Affected from

≥ 6.1.156 ≥ 6.6.112 ≥ 6.12.53 ≥ 6.17.3 ≥ 6.18

Fixed in

✓ 6.1.176 6.1.x ✓ 6.6.143 6.6.x ✓ 6.12.94 6.12.x ✓ 6.18.36 6.18.x ✓ 7.0.13 7.0.x ✓ 7.1

References

6 total

Kernel Git
https://git.kernel.org/stable/c/07ebe87915d8accdaba20c4f88c5ae430fe62fbb

Patch
Kernel Git
https://git.kernel.org/stable/c/0a3b87293fbd34fda651e6aead9964f84b893962

Patch
Kernel Git
https://git.kernel.org/stable/c/5b0166112019d1dce30b976ab28fd67f7f0be532

Patch
Kernel Git
https://git.kernel.org/stable/c/8b080c89183196fd3e49212f2a1a1c4a29335b9c

Patch
Kernel Git
https://git.kernel.org/stable/c/992f121796b7ca83a5a8b93da24e971363206218

Patch

Showing 5 of 6 references View all on NVD

Details

CVE ID CVE-2026-53160

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2026-06-25

Modified 2026-07-06

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-53160?

CVE-2026-53160 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as an Use After Free flaw (CWE-416) . It affects Linux kernel versions from 6.1.156 onward and has been patched in 6.1.176, 6.6.143, 6.12.94 and others. CVE-2026-53160 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-53160?

CVE-2026-53160 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2026-53160?

Yes. CVE-2026-53160 has been patched. Fixed versions include 6.1.176, 6.6.143, 6.12.94 and others. If you are running Linux kernel 6.1.156 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-53160 actively exploited?

No. CVE-2026-53160 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.