What is CVE-2023-52874?

CVE-2023-52874 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 6.4 onward and patched in 6.5.12, 6.6.2 and 6.7. CVE-2023-52874 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-52874?

CVE-2023-52874 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:H/I:N/A:N.

Is there a patch available for CVE-2023-52874?

Yes, CVE-2023-52874 has been patched. Fixed versions include 6.5.12, 6.6.2 and 6.7. If you are running Linux kernel 6.4 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2023-52874 actively exploited?

CVE-2023-52874 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2023-52874

Medium

In the Linux kernel, the following vulnerability has been resolved: x86/tdx: Zero out the missing RSI in TDX_HYPERCALL macro In the TDX_HYPERCALL asm, after the TDCALL instruction returns from the untrusted VMM, the registers that the TDX guest shares to the VMM need to be cleared to avoid speculative execution of VMM-provided values. RSI is specified in the bitmap of those registers, but it is missing when zeroing out those registers in the current TDX_HYPERCALL. It was there when it was originally added in commit 752d13305c78 ("x86/tdx: Expand __tdx_hypercall() to handle more arguments"), but was later removed in commit 1e70c680375a ("x86/tdx: Do not corrupt frame-pointer in __tdx_hypercall()"), which was correct because %rsi is later restored in the "pop %rsi". However a later commit 7a3a401874be ("x86/tdx: Drop flags from __tdx_hypercall()") removed that "pop %rsi" but forgot to add the "xor %rsi, %rsi" back. Fix by adding it back.

Package Linux Kernel

Published 2024-05-21

Last modified 2025-09-26

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

High

Integrity

None

Availability

None

Vector string

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

Affected versions

Linux kernel versions 6.4 and later are affected. Fixed in 6.5.12, 6.6.2, 6.7 and their respective stable series.

Affected from

≥ 6.4

Fixed in

✓ 6.5.12 6.5.x ✓ 6.6.2 6.6.x ✓ 6.7

References

3 total

Kernel Git
https://git.kernel.org/stable/c/2191950d35d8f81620ea8d4e04d983f664fe3a8a

Patch
Kernel Git
https://git.kernel.org/stable/c/5d092b66119d774853cc9308522620299048a662

Patch
Kernel Git
https://git.kernel.org/stable/c/de4c5bacca4f50233f1f791bec9eeb4dee1b14cd

Patch

Details

CVE ID CVE-2023-52874

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-05-21

Modified 2025-09-26

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2023-52874?

CVE-2023-52874 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 6.4 onward and has been patched in 6.5.12, 6.6.2 and 6.7. CVE-2023-52874 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-52874?

CVE-2023-52874 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:H/I:N/A:N.
Is there a patch available for CVE-2023-52874?

Yes. CVE-2023-52874 has been patched. Fixed versions include 6.5.12, 6.6.2 and 6.7. If you are running Linux kernel 6.4 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2023-52874 actively exploited?

No. CVE-2023-52874 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.