{"id":"CVE-2026-46331","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-46331","summary":"net/sched: fix pedit partial COW leading to page cache corruption","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: fix pedit partial COW leading to page cache corruption\n\ntcf_pedit_act() computes the COW range for skb_ensure_writable()\nonce before the key loop using tcfp_off_max_hint, but the hint does\nnot account for the runtime header offset added by typed keys. This\ncan leave part of the write region un-COW'd.\n\nFix by moving skb_ensure_writable() inside the per-key loop where\nthe actual write offset is known, and add overflow checking on the\noffset arithmetic. For negative offsets (e.g. Ethernet header edits\nat ingress), use skb_cow() to COW the headroom instead. Guard\noffset_valid() against INT_MIN, where negation is undefined.","published":"2026-06-16T06:26:21.066Z","modified":"2026-08-26T18:27:42.739343842Z","cvss":{"score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":{"score":0.00525,"percentile":0.42118,"asOf":"2026-08-24"},"cisaKev":null,"exploitsKnown":5,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"5.10.260"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2bec122b9fb91507a758ab5e3e5c4fbe7cb3f61b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3dee9d0c198faeb95d052c1b94c2958751a28512"},{"type":"WEB","url":"https://git.kernel.org/stable/c/544d857b42a1734b923040e13aa61a6fd4746cf2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/899ee91156e57784090c5565e4f31bd7dbffbc5a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a071e057518decc5e3bec89855758f5f8786f2c5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b198ed4e52580a7238c7c7082f03906f8b310313"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b685d6ef6f07a3b5ce814565a25f39f2157538a5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d5d01d35a5a7d36f7cb679b67d9cbdd5205672dc"},{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46331.json"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:27288"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:27353"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:27354"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:27355"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:27704"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:27705"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:27706"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:27707"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:27708"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:27709"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:27713"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:27731"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:27789"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:28887"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:28962"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:29080"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:29794"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:29799"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:29833"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:29856"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:29863"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:33219"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:33220"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:33221"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:33222"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:33223"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:33224"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:33225"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:33666"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:34048"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:34098"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:40021"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-46331"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46331.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46331"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2479492"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"EVIDENCE","url":"https://github.com/sgkdev/packet_edit_meme/tree/main"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-26T18:27:42.739343842Z"}}