{"id":"CVE-2026-90177","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Check pointer type for all atomic RMW paths\n\nAtomic RMW verification records an instruction pointer type only when the\ncurrent destination is PTR_TO_ARENA","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Check pointer type for all atomic RMW paths\n\nAtomic RMW verification records an instruction pointer type only when the\ncurrent destination is PTR_TO_ARENA. A secon…","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 >= d503a04f8bc0c75dc9db9452d8cc79d748afb752 < eb287c6e81dedef92da01eb947f380d0aae513c3","Linux >= d503a04f8bc0c75dc9db9452d8cc79d748afb752 < 4bc49ae344d65cfcef738f281ac575cf73ca2fc5","Linux 6.10"],"published":"2026-09-17","updated":"2026-09-18","sourceUpdated":"2026-09-18T18:17:45.693","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90177","references":[{"url":"https://git.kernel.org/stable/c/4bc49ae344d65cfcef738f281ac575cf73ca2fc5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/eb287c6e81dedef92da01eb947f380d0aae513c3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"epss":0.00154,"epssPercentile":0.04911,"ingestedAt":"2026-09-17T16:21:47.867Z","slug":"CVE-2026-90177","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Check pointer type for all atomic RMW paths\n\nAtomic RMW verification records an instruction pointer type only when the\ncurrent destination is PTR_TO_ARENA. A second path can therefore reach the\nsame instruction with an ordinary pointer without comparing it against the\nsaved arena type.\n\nThe post-verification fixup uses the saved type to rewrite the instruction\nto BPF_PROBE_ATOMIC for every path. Record the actual destination type for\nall atomic RMW paths so the existing mismatch check rejects incompatible\nuses of one instruction.\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":207167,"id":"CVE-2026-90177","ts":1789757338038,"field":"cvss","old":null,"new":"7.8"},{"seq":207166,"id":"CVE-2026-90177","ts":1789757338038,"field":"severity","old":"none","new":"high"}]}