{"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":"2026-10-15","sourceUpdated":"2026-10-15T11:17:58.977","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/d4ba9d888ac0a8f12c78071fff73e1205a0b9293","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/eb287c6e81dedef92da01eb947f380d0aae513c3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90177.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-90177"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536728"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90177"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90177"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-90177.mbox"},{"url":"https://kernelcve.org/list/?q=CVE-2026-90177"},{"url":"https://git.kernel.org/stable/c/b14dabe9656c1029abf3aa01e69c0d62f37f2f88"}],"tags":["nvd","cve.org","csaf","vex","red-hat","score-dispute"],"epss":0.00164,"epssPercentile":0.05567,"ingestedAt":"2026-09-17T16:21:47.867Z","cwe":["CWE-20"],"scores":{"nvd":7.8,"vendor":5.5,"cna":7.8},"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.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90177.json)","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"}]}