What is CVE-2024-26800?

CVE-2024-26800 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 5.15.160 onward and patched in 5.16, 6.6.21 and 6.7.9. CVE-2024-26800 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2024-26800?

CVE-2024-26800 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-2024-26800?

Yes, CVE-2024-26800 has been patched. Fixed versions include 5.16, 6.6.21 and 6.7.9. If you are running Linux kernel 5.15.160 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2024-26800 actively exploited?

CVE-2024-26800 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-2024-26800

High

In the Linux kernel, the following vulnerability has been resolved: tls: fix use-after-free on failed backlog decryption When the decrypt request goes to the backlog and crypto_aead_decrypt returns -EBUSY, tls_do_decryption will wait until all async decryptions have completed. If one of them fails, tls_do_decryption will return -EBADMSG and tls_decrypt_sg jumps to the error path, releasing all the pages. But the pages have been passed to the async callback, and have already been released by tls_decrypt_done. The only true async case is when crypto_aead_decrypt returns -EINPROGRESS. With -EBUSY, we already waited so we can tell tls_sw_recvmsg that the data is available for immediate copy, but we need to notify tls_decrypt_sg (via the new ->async_done flag) that the memory has already been released.

Package Linux Kernel

Published 2024-04-04

Last modified 2025-12-11

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-2024-26800 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 5.15.160, 6.6.18, 6.7.6 and later are affected. Fixed in 5.16, 6.6.21, 6.7.9 and their respective stable series.

Affected from

≥ 5.15.160 ≥ 6.6.18 ≥ 6.7.6

Fixed in

✓ 5.16 5.16.x ✓ 6.6.21 6.6.x ✓ 6.7.9 6.7.x

References

4 total

Kernel Git
https://git.kernel.org/stable/c/13114dc5543069f7b97991e3b79937b6da05f5b0

Patch
Kernel Git
https://git.kernel.org/stable/c/1ac9fb84bc7ecd4bc6428118301d9d864d2a58d1

Patch
Kernel Git
https://git.kernel.org/stable/c/81be85353b0f5a7b660635634b655329b429eefe

Patch
Kernel Git
https://git.kernel.org/stable/c/f2b85a4cc763841843de693bbd7308fe9a2c4c89

Patch

Details

CVE ID CVE-2024-26800

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2024-04-04

Modified 2025-12-11

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2024-26800?

CVE-2024-26800 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 5.15.160 onward and has been patched in 5.16, 6.6.21 and 6.7.9. CVE-2024-26800 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2024-26800?

CVE-2024-26800 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-2024-26800?

Yes. CVE-2024-26800 has been patched. Fixed versions include 5.16, 6.6.21 and 6.7.9. If you are running Linux kernel 5.15.160 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2024-26800 actively exploited?

No. CVE-2024-26800 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.