What is CVE-2026-23023?

CVE-2026-23023 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Memory Leak flaw (CWE-401), affecting Linux kernel versions from 6.7 onward and patched in 6.12.66, 6.18.6 and 6.19. CVE-2026-23023 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-23023?

CVE-2026-23023 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2026-23023?

Yes, CVE-2026-23023 has been patched. Fixed versions include 6.12.66, 6.18.6 and 6.19. If you are running Linux kernel 6.7 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-23023 actively exploited?

CVE-2026-23023 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-2026-23023

Medium

In the Linux kernel, the following vulnerability has been resolved: idpf: fix memory leak in idpf_vport_rel() Free vport->rx_ptype_lkup in idpf_vport_rel() to avoid leaking memory during a reset. Reported by kmemleak: unreferenced object 0xff450acac838a000 (size 4096): comm "kworker/u258:5", pid 7732, jiffies 4296830044 hex dump (first 32 bytes): 00 00 00 00 00 10 00 00 00 10 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 10 00 00 00 00 00 00 ................ backtrace (crc 3da81902): __kmalloc_cache_noprof+0x469/0x7a0 idpf_send_get_rx_ptype_msg+0x90/0x570 [idpf] idpf_init_task+0x1ec/0x8d0 [idpf] process_one_work+0x226/0x6d0 worker_thread+0x19e/0x340 kthread+0x10f/0x250 ret_from_fork+0x251/0x2b0 ret_from_fork_asm+0x1a/0x30

Package Linux Kernel

Published 2026-01-31

Last modified 2026-03-25

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-401

CVE-2026-23023 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 6.7 and later are affected. Fixed in 6.12.66, 6.18.6, 6.19 and their respective stable series.

Affected from

≥ 6.7

Fixed in

✓ 6.12.66 6.12.x ✓ 6.18.6 6.18.x ✓ 6.19

References

The following references provide additional information about CVE-2026-23023 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/a4212d6732e3f674c6cc7d0b642f276d827e8f94
Patch
Kernel patch commit
https://git.kernel.org/stable/c/ec602a2a4071eb956d656ba968c58fee09f0622d
Patch
Kernel patch commit
https://git.kernel.org/stable/c/f6242b354605faff263ca45882b148200915a3f6
Patch

Details

CVE ID CVE-2026-23023

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-01-31

Modified 2026-03-25

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-23023?

CVE-2026-23023 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a Memory Leak flaw (CWE-401) . It affects Linux kernel versions from 6.7 onward and has been patched in 6.12.66, 6.18.6 and 6.19. CVE-2026-23023 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-23023?

CVE-2026-23023 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2026-23023?

Yes — CVE-2026-23023 has been patched. Fixed versions include 6.12.66, 6.18.6 and 6.19. If you are running Linux kernel 6.7 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-23023 actively exploited?

No — CVE-2026-23023 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 →