{"id":"CVE-2026-90358","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, x86: Fix trampoline stack size for 128-bit arguments\n\nbtf_distill_func_proto() accepts a function argument up to 16 bytes, so a\n128-bit scalar such as __int128 rea…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, x86: Fix trampoline stack size for 128-bit arguments\n\nbtf_distill_func_proto() accepts a function argument up to 16 bytes, so a\n128-bit scalar such as __int128 rea…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= a9c5ad31fbdc4dec6d266fe22e51de1ad6d1bcf2 < 4aed2346fa9b88d458eeb8c01123f3c07585a675","Linux >= a9c5ad31fbdc4dec6d266fe22e51de1ad6d1bcf2 < 40f3bfbbb222b92278f3797614b70f68d46824ac","Linux >= a9c5ad31fbdc4dec6d266fe22e51de1ad6d1bcf2 < a6d7d7a253c550e74b0651897fe313c2f9b2301f","Linux >= a9c5ad31fbdc4dec6d266fe22e51de1ad6d1bcf2 < 814cba835ef648e0c5eb79505c96c0493b29eea6","Linux 6.1"],"published":"2026-09-17","updated":"2026-09-18","sourceUpdated":"2026-09-18T18:17:55.317","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90358","references":[{"url":"https://git.kernel.org/stable/c/40f3bfbbb222b92278f3797614b70f68d46824ac","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4aed2346fa9b88d458eeb8c01123f3c07585a675","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/814cba835ef648e0c5eb79505c96c0493b29eea6","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a6d7d7a253c550e74b0651897fe313c2f9b2301f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"epss":0.00163,"epssPercentile":0.05973,"ingestedAt":"2026-09-17T16:21:47.813Z","slug":"CVE-2026-90358","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nbpf, x86: Fix trampoline stack size for 128-bit arguments\n\nbtf_distill_func_proto() accepts a function argument up to 16 bytes, so a\n128-bit scalar such as __int128 reaches the x86 trampoline with\narg_size == 16. But the current implementation assumes an __int128\nargument only needs one register, so the register save area is\nunder-allocated and save_args() overwrites adjacent stack slots.\n\nCompute the register count from arg_size for all arguments to fix it.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":207275,"id":"CVE-2026-90358","ts":1789757340230,"field":"cvss","old":null,"new":"7.8"},{"seq":207274,"id":"CVE-2026-90358","ts":1789757340230,"field":"severity","old":"none","new":"high"}]}