--- cve: "CVE-2022-48809" severity: "LOW" cvss: 3.1 epss: "28%" vendor: "Linux" kev: false exploited: false published: "2024-07-16 12:15:05" tags: [cve, security, low] source: tsecurity.de CVE-Dossier exported: "2026-09-15T00:37:44+02:00" --- # CVE-2022-48809 > 3.1 LOW ## Beschreibung In the Linux kernel, the following vulnerability has been resolved: net: fix a memleak when uncloning an skb dst and its metadata When uncloning an skb dst and its associated metadata, a new dst+metadata is allocated and later replaces the old one in the skb. This is helpful to have a non-shared dst+metadata attached to a specific skb. The issue is the uncloned dst+metadata is initialized with a refcount of 1, which is increased to 2 before attaching it to the skb. When tun_dst_unclone returns, the dst+metadata is only referenced from a single place (the skb) while its refcount is 2. Its refcount will never drop to 0 (when the skb is consumed), leading to a memory leak. Fix this by removing the call to dst_hold in tun_dst_unclone, as the dst+metadata refcount is already 1. ## Patch verfügbar (OSV) - Kernel ≥ 4.9.302 - Kernel ≥ 4.14.267 - Kernel ≥ 4.19.230 - Kernel ≥ 5.4.180 - Kernel ≥ 5.10.101 - Kernel ≥ 5.15.24 - Kernel ≥ 5.16.10 ## Referenzen - - - - - - - - --- _Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2022-48809) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_