What is CVE-2026-23453?

CVE-2026-23453 is a High severity Linux kernel vulnerability with a CVSS score of 7.5 out of 10, classified as a Memory Leak flaw (CWE-401), affecting Linux kernel versions from 6.19 onward and patched in 6.19.10 and 7.0. CVE-2026-23453 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-23453?

CVE-2026-23453 has a CVSS score of 7.5 out of 10, rated High severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2026-23453?

Yes, CVE-2026-23453 has been patched. Fixed versions include 6.19.10 and 7.0. If you are running Linux kernel 6.19 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-23453 actively exploited?

CVE-2026-23453 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Memory Leak (CWE-401)?

The product does not release memory after use, causing gradual resource exhaustion. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/401.html

CVE-2026-23453

High

In the Linux kernel, the following vulnerability has been resolved: net: ti: icssg-prueth: Fix memory leak in XDP_DROP for non-zero-copy mode Page recycling was removed from the XDP_DROP path in emac_run_xdp() to avoid conflicts with AF_XDP zero-copy mode, which uses xsk_buff_free() instead. However, this causes a memory leak when running XDP programs that drop packets in non-zero-copy mode (standard page pool mode). The pages are never returned to the page pool, leading to OOM conditions. Fix this by handling cleanup in the caller, emac_rx_packet(). When emac_run_xdp() returns ICSSG_XDP_CONSUMED for XDP_DROP, the caller now recycles the page back to the page pool. The zero-copy path, emac_rx_packet_zc() already handles cleanup correctly with xsk_buff_free().

Package Linux Kernel

Published 2026-04-03

Last modified 2026-05-26

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.5

out of 10

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-401

CVE-2026-23453 is a Memory Leak vulnerability

What is Memory Leak?

The product does not release memory after use, causing gradual resource exhaustion. Learn more on MITRE CWE

Affected versions

Linux kernel versions 6.19 and later are affected. Fixed in 6.19.10, 7.0 and their respective stable series.

Affected from

≥ 6.19

Fixed in

✓ 6.19.10 6.19.x ✓ 7.0

References

The following references provide additional information about CVE-2026-23453 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/719d3e71691db7c4f1658ba5a6d1472928121594
Patch
Kernel patch commit
https://git.kernel.org/stable/c/d16d57dedcb69c1a1257e0638f8698ce1f0ccbe5
Patch

Details

CVE ID CVE-2026-23453

Severity High

CVSS score 7.5 / 10

CVSS version 3.1

Published 2026-04-03

Modified 2026-05-26

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-23453?

CVE-2026-23453 is a High severity Linux kernel vulnerability with a CVSS score of 7.5 out of 10 , classified as a Memory Leak flaw (CWE-401) . It affects Linux kernel versions from 6.19 onward and has been patched in 6.19.10 and 7.0. CVE-2026-23453 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-23453?

CVE-2026-23453 has a CVSS score of 7.5 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2026-23453?

Yes — CVE-2026-23453 has been patched. Fixed versions include 6.19.10 and 7.0. If you are running Linux kernel 6.19 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-23453 actively exploited?

No — CVE-2026-23453 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Memory Leak (CWE-401)?

The product does not release memory after use, causing gradual resource exhaustion. View CWE-401 on MITRE CWE →