HighFix available
net/sched: fix pedit partial COW leading to page cache corruption
Type: advisorySources: OSV
In 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.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.10.260, 5.15.211, 6.1.177, 6.12.94, 6.18.36, 6.6.144, 7.0.13
- CVEs
- CVE-2026-46331
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 16:34 UTC · Revision 1
Source evidence
net/sched: fix pedit partial COW leading to page cache corruption
core-osv · Original sourcePublished 16 Jun 2026, 06:26 UTC
In 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.
osv:CVE-2026-46331
Kernel
Fixed versions: 5.10.260, 5.15.211, 6.1.177, 6.6.144, 6.12.94, 6.18.36, 7.0.13
Complete source record
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],
"modified": "2026-10-28T02:30:30.797614684Z",
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"https://access.redhat.com/errata/RHSA-2026:29794",
"https://access.redhat.com/errata/RHSA-2026:29799",
"https://access.redhat.com/errata/RHSA-2026:29833",
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"https://access.redhat.com/errata/RHSA-2026:33223",
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"https://access.redhat.com/errata/RHSA-2026:33225",
"https://access.redhat.com/errata/RHSA-2026:33666",
"https://access.redhat.com/errata/RHSA-2026:34048",
"https://access.redhat.com/errata/RHSA-2026:34098",
"https://access.redhat.com/errata/RHSA-2026:40021",
"https://access.redhat.com/security/cve/CVE-2026-46331",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46331.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-46331",
"https://bugzilla.redhat.com/show_bug.cgi?id=2479492",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"https://github.com/sgkdev/packet_edit_meme/tree/main"
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},
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"value": "CVE-2026-46331",
"evidence": "/id"
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"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 497433,
"published_at": "2026-06-16T06:26:21.066+00:00"
}