CVE-2023-52669 crypto: s390/aes - Fix buffer overread in CTR mode

What is CVE-2023-52669?

CVE-2023-52669 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 17 May 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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

crypto: s390/aes - Fix buffer overread in CTR mode

When processing the last block, the s390 ctr code will always read a whole block, even if there isn't a whole block of data left. Fix this by using the actual length left and copy it into a buffer first for processing.

Weakness: CWE-787

Which versions are affected by CVE-2023-52669?

It affects 2 products.

Products include Debian Debian Linux, Linux kernel.

How do I fix CVE-2023-52669?

Apply the vendor's patch.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2023-52669 being exploited?

There is no known exploitation of CVE-2023-52669 in the wild and no public exploit code.

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All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2023-52669, DEBIAN-CVE-2023-52669, GHSA-mjwr-f33f-hp8q, UBUNTU-CVE-2023-52669.