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CVE-2022-49804

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: s390: avoid using global register for current_stack_pointer Commit 30de14b1884b ("s390: current_stack_pointer shouldn't be a fu…

Published May 1, 2025CWE-787EPSS 0.19%

Overview

CVE-2022-49804 is a high-severity vulnerability. It was published on May 1, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

s390: avoid using global register for current_stack_pointer

Commit 30de14b1884b ("s390: current_stack_pointer shouldn't be a

function") made current_stack_pointer a global register variable like

on many other architectures. Unfortunately on s390 it uncovers old

gcc bug which is fixed only since gcc-9.1 [gcc commit 3ad7fed1cc87

("S/390: Fix PR89775. Stackpointer save/restore instructions removed")]

and backported to gcc-8.4 and later. Due to this bug gcc versions prior

to 8.4 generate broken code which leads to stack corruptions.

Current minimal gcc version required to build the kernel is declared

as 5.1. It is not possible to fix all old gcc versions, so work

around this problem by avoiding using global register variable for

current_stack_pointer.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/a478952a8ac44e32316dc046a063a7dc34825aa6Refgit.kernel.org/stable/c/e3c11025bcd2142a61abe5806b2f86a0e78118df

How CyberStrike helps

Frequently asked questions

What is CVE-2022-49804?

CVE-2022-49804 is a high-severity vulnerability. It was published on May 1, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2022-49804?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2022-49804?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2022-49804?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-49804 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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