CVE-2023-54056

Summary

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 …

Affected Software

VendorProductVersion RangeStatus
LinuxLinux43d8ce9d65a54846d378545770991e65838981e0 < 719459877d58c8aced5845c1e5b98d8d87d09197affected
LinuxLinux43d8ce9d65a54846d378545770991e65838981e0 < fcd2da2e6bf2640a31a2a5b118b50dc3635c707baffected
LinuxLinux43d8ce9d65a54846d378545770991e65838981e0 < 4a07d2d511e2703efd4387891d49e0326f1157f3affected
LinuxLinux43d8ce9d65a54846d378545770991e65838981e0 < b9f6845a492de20679b84bda6b08be347c5819daaffected
LinuxLinux43d8ce9d65a54846d378545770991e65838981e0 < d6d1af6b8611801b585c53c0cc63626c8d339e96affected
LinuxLinux43d8ce9d65a54846d378545770991e65838981e0 < 82d2e01b95c439fe55fab5e04fc83387c42d3a48affected
LinuxLinux43d8ce9d65a54846d378545770991e65838981e0 < b69edab47f1da8edd8e7bfdf8c70f51a2a5d89fbaffected
LinuxLinux5.2affected
LinuxLinux0 < 5.2unaffected
LinuxLinux5.4.243 <= 5.4.*unaffected
LinuxLinux5.10.180 <= 5.10.*unaffected
LinuxLinux5.15.111 <= 5.15.*unaffected
LinuxLinux6.1.28 <= 6.1.*unaffected
LinuxLinux6.2.15 <= 6.2.*unaffected
LinuxLinux6.3.2 <= 6.3.*unaffected
LinuxLinux6.4 <= *unaffected

Weaknesses

References