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CVE-2023-54056

UnknownEPSS 0.19%

Last modified

CVE-2023-54056 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: kheaders: Use array declaration instead of char Under CONFIG_FORTIFY_SOURCE, memcpy() will check the size of destination and source buffers. Defining kernel_headers_data as "char" would trip this check. EPSS estimates a 0.19% chance of exploitation in the next 30 days.

Description

In the Linux kernel, the following vulnerability has been resolved: kheaders: Use array declaration instead of char Under CONFIG_FORTIFY_SOURCE, memcpy() will check the size of destination and source buffers. Defining kernel_headers_data as "char" would trip this check. Since these addresses are treated as byte arrays, define them as arrays (as done everywhere else). This was seen with: $ cat /sys/kernel/kheaders.tar.xz >> /dev/null detected buffer overflow in memcpy kernel BUG at lib/string_helpers.c:1027! ... RIP: 0010:fortify_panic+0xf/0x20 [...] Call Trace: <TASK> ikheaders_read+0x45/0x50 [kheaders] kernfs_fop_read_iter+0x1a4/0x2f0 ...

Metrics

EPSS Probability
0.19%

8.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 43d8ce9d65a54846d378545770991e65838981e0, < 719459877d58c8aced5845c1e5b98d8d87d09197; >= 43d8ce9d65a54846d378545770991e65838981e0, < fcd2da2e6bf2640a31a2a5b118b50dc3635c707b; >= 43d8ce9d65a54846d378545770991e65838981e0, < 4a07d2d511e2703efd4387891d49e0326f1157f3; >= 43d8ce9d65a54846d378545770991e65838981e0, < b9f6845a492de20679b84bda6b08be347c5819da; >= 43d8ce9d65a54846d378545770991e65838981e0, < d6d1af6b8611801b585c53c0cc63626c8d339e96; >= 43d8ce9d65a54846d378545770991e65838981e0, < 82d2e01b95c439fe55fab5e04fc83387c42d3a48; >= 43d8ce9d65a54846d378545770991e65838981e0, < b69edab47f1da8edd8e7bfdf8c70f51a2a5d89fb
LinuxLinux5.2

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is CVE-2023-54056?
In the Linux kernel, the following vulnerability has been resolved: kheaders: Use array declaration instead of char Under CONFIG_FORTIFY_SOURCE, memcpy() will check the size of destination and source buffers. Defining kernel_headers_data as "char" would trip this check. Since these addresses are treated as byte arrays, define them as arrays (as done everywhere else). This was seen with: $ cat /sys/kernel/kheaders.tar.xz >> /dev/null detected buffer overflow in memcpy kernel BUG at lib/string_helpers.c:1027! ... RIP: 0010:fortify_panic+0xf/0x20 [...] Call Trace: <TASK> ikheaders_read+0x45/0x50 [kheaders] kernfs_fop_read_iter+0x1a4/0x2f0 ...
How severe is CVE-2023-54056?
Severity scoring for CVE-2023-54056 is pending analysis. The EPSS model estimates a 0.19% probability of exploitation in the next 30 days.
How do I fix CVE-2023-54056?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST