---
cve: "CVE-2022-48757"
severity: "LOW"
cvss: 3.1
epss: "22%"
vendor: "Linux"
kev: false
exploited: false
published: "2024-06-20 12:15:13"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-13T04:17:07+02:00"
---

# CVE-2022-48757

> 3.1 LOW

## Beschreibung

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

net: fix information leakage in /proc/net/ptype

In one net namespace, after creating a packet socket without binding
it to a device, users in other net namespaces can observe the new
`packet_type` added by this packet socket by reading `/proc/net/ptype`
file. This is minor information leakage as packet socket is
namespace aware.

Add a net pointer in `packet_type` to keep the net namespace of
of corresponding packet socket. In `ptype_seq_show`, this net pointer
must be checked when it is not NULL.

## Patch verfügbar (OSV)

- Kernel ≥ 4.4.302
- Kernel ≥ 4.9.300
- Kernel ≥ 4.14.265
- Kernel ≥ 4.19.228
- Kernel ≥ 5.4.176
- Kernel ≥ 5.10.96
- Kernel ≥ 5.15.19
- Kernel ≥ 5.16.5

## Referenzen

- <https://git.kernel.org/stable/c/8f88c78d24f6f346919007cd459fd7e51a8c7779>
- <https://git.kernel.org/stable/c/be1ca30331c7923c6f376610c1bd6059be9b1908>
- <https://git.kernel.org/stable/c/c38023032a598ec6263e008d62c7f02def72d5c7>
- <https://git.kernel.org/stable/c/b67ad6170c0ea87391bb253f35d1f78857736e54>
- <https://git.kernel.org/stable/c/e372ecd455b6ebc7720f52bf4b5f5d44d02f2092>
- <https://git.kernel.org/stable/c/db044d97460ea792110eb8b971e82569ded536c6>
- <https://git.kernel.org/stable/c/e43669c77cb3a742b7d84ecdc7c68c4167a7709b>
- <https://git.kernel.org/stable/c/839ec7039513a4f84bfbaff953a9393471176bee>
- <https://git.kernel.org/stable/c/47934e06b65637c88a762d9c98329ae6e3238888>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2022-48757) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_