CVE Watch19 oct 2026

CVE-2026-46323

In the Linux kernel, the following vulnerability has been resolved: net: gro: don't merge zcopy skbs skb_gro_receive() can currently copy

CVSS

7.8

Alto

EPSS

0.1%

KEV

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Exploit Today

0-100

Publicado: 9 jun 2026 · Última mod.: 19 oct 2026 · CWE-416 · CWE-123

EPSS · 30d

0.1%EPSS · 30 días0.2%

2026-09-282026-10-26

Descripción técnica

In the Linux kernel, the following vulnerability has been resolved: net: gro: don't merge zcopy skbs skb_gro_receive() can currently copy frags between the source and GRO skb, without checking the zerocopy status, and in particular the SKBFL_MANAGED_FRAG_REFS flag. When SKBFL_MANAGED_FRAG_REFS is set, the skb doesn't hold a reference on the pages in shinfo->frags. Appending those frags to another skb's frags without fixing up the page refcount can lead to UAF. When either the last skb in the GRO chain (the one we would append frags to) or the source skb is zerocopy, don't merge the skbs.

Referencias oficiales

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