---
cve: "CVE-2026-64411"
severity: "HIGH"
cvss: 7.1
epss: "13%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-07-25 10:17:24"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-06T14:39:10+02:00"
---

# CVE-2026-64411

> 7.1 HIGH

## Beschreibung

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

netfilter: ebtables: terminate table name before find_table_lock()

update_counters() and compat_update_counters() forward a user-supplied
32-byte table name to find_table_lock() without NUL-terminating it. On a
lookup miss, find_inlist_lock() calls try_then_request_module(..., "%s%s",
"ebtable_", name), and vsnprintf() reads past the name field and the
stack object until it hits a zero byte.

  BUG: KASAN: stack-out-of-bounds in string (lib/vsprintf.c:648 lib/vsprintf.c:730)
  Read of size 1 at addr ffff8880119dfb20 by task exploit/147
  Call Trace:
  ...
   string (lib/vsprintf.c:648 lib/vsprintf.c:730)
   vsnprintf (lib/vsprintf.c:2945)
   __request_module (kernel/module/kmod.c:150)
   do_update_counters.isra.0 (net/bridge/netfilter/ebtables.c:371 net/bridge/netfilter/ebtables.c:380)
   update_counters (net/bridge/netfilter/ebtables.c:1440)
   do_ebt_set_ctl (net/bridge/netfilter/ebtables.c:2573)
   nf_setsockopt (net/netfilter/nf_sockopt.c:101)
   ip_setsockopt (net/ipv4/ip_sockglue.c:1424)
   raw_setsockopt (net/ipv4/raw.c:847)
   __sys_setsockopt (net/socket.c:2393)
  ...

compat_do_replace() shares the same unterminated name via
compat_copy_ebt_replace_from_user(); terminate it there too so all
find_table_lock() callers behave alike. The other callers already
terminate the name after the copy.

## CVSS-Vektor

```
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/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 | Keine | good |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- Kernel ≥ 5.10.261
- Kernel ≥ 5.15.212
- Kernel ≥ 6.1.178
- Kernel ≥ 6.6.145
- Kernel ≥ 6.12.96
- Kernel ≥ 6.18.39
- Kernel ≥ 7.1.4

## Referenzen

- <https://git.kernel.org/stable/c/4c046ca4e35a83ea32f6e748f54139f5fe2a1d01>
- <https://git.kernel.org/stable/c/ab63ccefb9c71627f957a0724c2b9ebc869c6f20>
- <https://git.kernel.org/stable/c/c6f539311e58e76aa96feef0f1572b13a564f8a2>
- <https://git.kernel.org/stable/c/2664f537ca5bcb2ef3fac2683dcca602e51fad24>
- <https://git.kernel.org/stable/c/7436da6c1bc44654b7f11a17e746f6999fd37250>
- <https://git.kernel.org/stable/c/6fe8d3cecd20bfaaaf440db3a06ba674d2f2e322>
- <https://git.kernel.org/stable/c/b6183b1b88a722b6d8ea0cecc99eba168a15e0be>
- <https://git.kernel.org/stable/c/a622d2e9608c9dff47fc2e5759ac7aa3a836b45d>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-64411) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_