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CVE-2025-22036

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: exfat: fix random stack corruption after get_block When get_block is called with a buffer_head allocated on the stack, such as…

Published Apr 16, 2025CWE-362EPSS 0.20%

Overview

CVE-2025-22036 is a high-severity vulnerability. It was published on April 16, 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:

exfat: fix random stack corruption after get_block

When get_block is called with a buffer_head allocated on the stack, such

as do_mpage_readpage, stack corruption due to buffer_head UAF may occur in

the following race condition situation.

<CPU 0> <CPU 1>

mpage_read_folio

<<bh on stack>>

do_mpage_readpage

exfat_get_block

bh_read

__bh_read

get_bh(bh)

submit_bh

wait_on_buffer

...

end_buffer_read_sync

__end_buffer_read_notouch

unlock_buffer

<<keep going>>

...

...

...

...

<<bh is not valid out of mpage_read_folio>>

.

.

another_function

<<variable A on stack>>

put_bh(bh)

atomic_dec(bh->b_count)

* stack corruption here

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/1bb7ff4204b6d4927e982cd256286c09ed4fd8caRefgit.kernel.org/stable/c/49b0a6ab8e528a0c1c50e37cef9b9c7c121365f2Refgit.kernel.org/stable/c/f7447286363dc1e410bf30b87d75168f3519f9ccRefgit.kernel.org/stable/c/f807a6bf2005740fa26b4f59c4a003dc966b9afd

How CyberStrike helps

Frequently asked questions

What is CVE-2025-22036?

CVE-2025-22036 is a high-severity vulnerability. It was published on April 16, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2025-22036?

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-2025-22036?

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-2025-22036?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-22036 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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