---
cve: "CVE-2026-46331"
severity: "HIGH"
cvss: 7.8
epss: "52%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-06-16 08:16:23"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-08T16:04:41+02:00"
---

# CVE-2026-46331

> 7.8 HIGH

## Beschreibung

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.

## CVSS-Vektor

```
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- Kernel ≥ 5.10.260
- Kernel ≥ 5.15.211
- Kernel ≥ 6.1.177
- Kernel ≥ 6.6.144
- Kernel ≥ 6.12.94
- Kernel ≥ 6.18.36
- Kernel ≥ 7.0.13

## Referenzen

- <https://git.kernel.org/stable/c/544d857b42a1734b923040e13aa61a6fd4746cf2>
- <https://git.kernel.org/stable/c/d5d01d35a5a7d36f7cb679b67d9cbdd5205672dc>
- <https://git.kernel.org/stable/c/a071e057518decc5e3bec89855758f5f8786f2c5>
- <https://git.kernel.org/stable/c/b685d6ef6f07a3b5ce814565a25f39f2157538a5>
- <https://git.kernel.org/stable/c/2bec122b9fb91507a758ab5e3e5c4fbe7cb3f61b>
- <https://git.kernel.org/stable/c/b198ed4e52580a7238c7c7082f03906f8b310313>
- <https://git.kernel.org/stable/c/3dee9d0c198faeb95d052c1b94c2958751a28512>
- <https://git.kernel.org/stable/c/899ee91156e57784090c5565e4f31bd7dbffbc5a>
- <https://access.redhat.com/errata/RHSA-2026:27288>
- <https://access.redhat.com/errata/RHSA-2026:27353>
- <https://access.redhat.com/errata/RHSA-2026:27354>
- <https://access.redhat.com/errata/RHSA-2026:27355>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-46331) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_