---
cve: "CVE-2026-64414"
severity: "HIGH"
cvss: 7.5
epss: "44%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-07-25 10:17:25"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-06T15:14:12+02:00"
---

# CVE-2026-64414

> 7.5 HIGH

## Beschreibung

In the Linux kernel, the following vulnerability has been resolved:

netfilter: handle unreadable frags

sashiko reports:
 When an skb with unreadable fragments (such as from devmem TCP, where
 skb_frags_readable(skb) returns false) is processed by the u32 module,
 skb_copy_bits() will safely return a negative error code [..]

xt_u32: bail out with hotdrop in this case.
gather_frags: return -1, just as if we had no fragment header.
nfnetlink_queue: restrict to the linear part.
nfnetlink_log: restrict to the linear part.

v2:
 - skb_zerocopy helpers don't copy readable flag, i.e. nfnetlink_queue
 is broken too
 xt_u32 shouldn't return true if hotdrop was set.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- Kernel ≥ 6.12.96
- Kernel ≥ 6.18.39
- Kernel ≥ 7.1.4

## Referenzen

- <https://git.kernel.org/stable/c/3b13e7635795394705920cca1e1db7e4ca2e334b>
- <https://git.kernel.org/stable/c/fc5bfe63bacf8a3ae307b62b34206406ca733354>
- <https://git.kernel.org/stable/c/57056be3ec12e7d9ecd20a60d4060f510e4f284c>
- <https://git.kernel.org/stable/c/da5b58478a9c1b85608c9e40a3b8432d071b409e>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-64414) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_