cve-2026-46331
HIGH vulncheck_kevIn the Linux kernel, the following vulnerability has been resolved: net/sched: fix pedit partial COW leading to page cache corruption tcf_pedit_act() computes the COW range for skb_ensure_writable() once before the key loop using tcfp_off_max_hint, but the hint does not account for the runtime header offset added by typed keys. This can leave part of the write region un-COW'd. Fix by moving skb_ensure_writable() inside the per-key loop where the actual write offset is known, and add overflow checking on the offset arithmetic. For negative offsets (e.g. Ethernet header edits at ingress), use skb_cow() to COW the headroom instead. Guard offset_valid() against INT_MIN, where negation is undefined.
- Published
- 2026-08-26 00:00 UTC
- Last Modified
- 2026-08-26
CVSS details not available.
No product information available.
No references available.
{
"cvss": 0.0,
"datePublished": "2026-08-26T00:00:00Z",
"dateUpdated": "2026-08-26T00:00:00Z",
"description": "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.",
"dueDate": "",
"id": "CVE-2026-46331",
"kev_catalogs": [
"vulncheck"
],
"knownRansomwareCampaignUse": "Unknown",
"product": "Kernel",
"requiredAction": "Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.",
"severity": "HIGH",
"source": "vulncheck_kev",
"title": "Linux Kernel Integer Overflow or Wraparound",
"vendor": "Linux"
}