CVE-2026-68151
Description
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").
How to fix
- Linux Linux9854538349aaf6fb88ed33b56987954ac1716151, 3c31397b0a75310217f1f2f3c7bdfd8af67aec4c, 849a7bd9d266e43a457db5c6b322600f916a2127, e4563e07ef5c938d5332c5c44721db976f214bc6, 21eaf5594a33d16343a011c752624099c30e918f, 89b9121c3b0162655fc2f190b714ae64f1aa8cae, 69ecc199880bf7e8d06224c82dc411d18f9285f8, 3349ef6a366a61d631f6a263d12cea240957719d or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ≤ v < 9854538349aaf6fb88ed33b56987954ac1716151, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ≤ v < 3c31397b0a75310217f1f2f3c7bdfd8af67aec4c, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ≤ v < 849a7bd9d266e43a457db5c6b322600f916a2127, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ≤ v < e4563e07ef5c938d5332c5c44721db976f214bc6, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ≤ v < 21eaf5594a33d16343a011c752624099c30e918f, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ≤ v < 89b9121c3b0162655fc2f190b714ae64f1aa8cae, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ≤ v < 69ecc199880bf7e8d06224c82dc411d18f9285f8, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ≤ v < 3349ef6a366a61d631f6a263d12cea240957719d, 2.6.12 | 9854538349aaf6fb88ed33b56987954ac1716151, 3c31397b0a75310217f1f2f3c7bdfd8af67aec4c, 849a7bd9d266e43a457db5c6b322600f916a2127, e4563e07ef5c938d5332c5c44721db976f214bc6, 21eaf5594a33d16343a011c752624099c30e918f, 89b9121c3b0162655fc2f190b714ae64f1aa8cae, 69ecc199880bf7e8d06224c82dc411d18f9285f8, 3349ef6a366a61d631f6a263d12cea240957719d |
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