CVE-2023-54056
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 ...
How to fix
- Linux Linux719459877d58c8aced5845c1e5b98d8d87d09197, fcd2da2e6bf2640a31a2a5b118b50dc3635c707b, 4a07d2d511e2703efd4387891d49e0326f1157f3, b9f6845a492de20679b84bda6b08be347c5819da, d6d1af6b8611801b585c53c0cc63626c8d339e96, 82d2e01b95c439fe55fab5e04fc83387c42d3a48, b69edab47f1da8edd8e7bfdf8c70f51a2a5d89fb or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 43d8ce9d65a54846d378545770991e65838981e0 ≤ v < 719459877d58c8aced5845c1e5b98d8d87d09197, 43d8ce9d65a54846d378545770991e65838981e0 ≤ v < fcd2da2e6bf2640a31a2a5b118b50dc3635c707b, 43d8ce9d65a54846d378545770991e65838981e0 ≤ v < 4a07d2d511e2703efd4387891d49e0326f1157f3, 43d8ce9d65a54846d378545770991e65838981e0 ≤ v < b9f6845a492de20679b84bda6b08be347c5819da, 43d8ce9d65a54846d378545770991e65838981e0 ≤ v < d6d1af6b8611801b585c53c0cc63626c8d339e96, 43d8ce9d65a54846d378545770991e65838981e0 ≤ v < 82d2e01b95c439fe55fab5e04fc83387c42d3a48, 43d8ce9d65a54846d378545770991e65838981e0 ≤ v < b69edab47f1da8edd8e7bfdf8c70f51a2a5d89fb, 5.2 | 719459877d58c8aced5845c1e5b98d8d87d09197, fcd2da2e6bf2640a31a2a5b118b50dc3635c707b, 4a07d2d511e2703efd4387891d49e0326f1157f3, b9f6845a492de20679b84bda6b08be347c5819da, d6d1af6b8611801b585c53c0cc63626c8d339e96, 82d2e01b95c439fe55fab5e04fc83387c42d3a48, b69edab47f1da8edd8e7bfdf8c70f51a2a5d89fb |
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