{"id":"CVE-2026-93144","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Reject writes through untrusted BTF pointers\n\ncheck_ptr_to_btf_access() lets program-type btf_struct_access callbacks\nvalidate writes before the default BTF access…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Reject writes through untrusted BTF pointers\n\ncheck_ptr_to_btf_access() lets program-type btf_struct_access callbacks\nvalidate writes before the default BTF access…","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","cwe":["CWE-1220"],"vendor":"Linux","product":"Linux","affected":["Linux >= 282de143ead96a5d53331e946f31c977b4610a74 < 19d5566b84ca1af0256d0d0003e1a081580c3ba3","Linux >= 282de143ead96a5d53331e946f31c977b4610a74 < ac65c710cc643cbc52b899627577357867249530","Linux 6.2"],"published":"2026-09-17","updated":"2026-10-15","sourceUpdated":"2026-10-15T11:18:05.997","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-93144","references":[{"url":"https://git.kernel.org/stable/c/19d5566b84ca1af0256d0d0003e1a081580c3ba3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/644cf4e77c2770d4246f6d12f99bc80d253b0ec6","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ac65c710cc643cbc52b899627577357867249530","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93144.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-93144"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536785"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93144"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93144"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-93144.mbox"},{"url":"https://git.kernel.org/stable/c/56f92fecd80419567288b7972caa90107033836e"},{"url":"https://git.kernel.org/stable/c/c4dc883447ae38c4e22a29cc016046fa65d88994"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00184,"epssPercentile":0.07894,"scores":{"nvd":7.8,"vendor":6.4,"cna":7.8},"ingestedAt":"2026-09-17T16:21:47.743Z","slug":"CVE-2026-93144","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Reject writes through untrusted BTF pointers\n\ncheck_ptr_to_btf_access() lets program-type btf_struct_access callbacks\nvalidate writes before the default BTF access path rejects non-read\naccesses. That bypasses the read-only policy for untrusted BTF pointers\ncreated by helpers such as bpf_rdonly_cast().\n\nReject non-read accesses through PTR_UNTRUSTED BTF pointers at the\ncommon entry point, before the callback branch to handle all cases.\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** · Important · 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 2026-09-30 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93144.json)","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":207393,"id":"CVE-2026-93144","ts":1789757343389,"field":"cvss","old":null,"new":"7.8"},{"seq":207392,"id":"CVE-2026-93144","ts":1789757343389,"field":"severity","old":"none","new":"high"}]}