CVE-2026-68151

Summary

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

binfmt_elf_fdpic: only honour the first PT_INTERP

The program header scan handles PT_INTERP from a switch nested in the scan loop, so its break leaves the switch and not the loop. A binary carrying more than one PT_INTERP runs the case again and overwrites both interpreter_name and interpreter. The previous name allocation leaks and so does the previous interpreter reference, along with the write denial open_exec() took on it. The denial is never released, so the file stays unwritable for as long as the system runs.

An unprivileged caller reaches this with a crafted binary and repeats it at will. binfmt_elf stops at the first PT_INTERP. Do the same here.

The flaw dates back to the driver's introduction in the pre-git history tree introduced in v2.6.11 by 91808d6ebe39 ("[PATCH] FRV: Add FDPIC ELF binary format driver").

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < e4563e07ef5c938d5332c5c44721db976f214bc6affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 21eaf5594a33d16343a011c752624099c30e918faffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 89b9121c3b0162655fc2f190b714ae64f1aa8caeaffected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 69ecc199880bf7e8d06224c82dc411d18f9285f8affected
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 3349ef6a366a61d631f6a263d12cea240957719daffected
LinuxLinux2.6.12affected
LinuxLinux0 < 2.6.12unaffected
LinuxLinux6.6.148 <= 6.6.*unaffected
LinuxLinux6.12.101 <= 6.12.*unaffected
LinuxLinux6.18.42 <= 6.18.*unaffected
LinuxLinux7.1.6 <= 7.1.*unaffected
LinuxLinux7.2-rc5 <= *unaffected

Weaknesses

References