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9.8 Critique

CVE-2026-53228 In the Linux kernel, the following vulnerability has been resolved: ipv6: sit: reload inner IPv6 header after GSO…

Description

In the Linux kernel, the following vulnerability has been resolved: ipv6: sit: reload inner IPv6 header after GSO offloads ipip6_tunnel_xmit() caches the inner IPv6 header pointer at function entry and continues using it after iptunnel_handle_offloads(). For GSO skbs, iptunnel_handle_offloads() calls skb_header_unclone(). When the skb header is cloned, skb_header_unclone() can call pskb_expand_head(), which may move the skb head. The pskb_expand_head() contract requires pointers into the skb header to be reloaded after the call. If the later skb_realloc_headroom() branch is not taken, SIT uses the stale iph6 pointer to read the inner hop limit and DS field. That can read from a freed skb head after the old head's remaining clone is released. Reload iph6 after the offload helper succeeds and before subsequent reads from the inner IPv6 header. Keep the existing reload after skb_realloc_headroom(), since that branch can also replace the skb.

Produits et versions touchés

Produit Versions touchées Corrigé en
Linux 7.1 premières → < 7.1 7.1
Linux 7.0 premières → < 7.0.13 7.0.13
Linux 6.18 premières → < 6.18.36 6.18.36
Linux 6.12 premières → < 6.12.94 6.12.94
Linux 6.6 premières → < 6.6.143 6.6.143
Linux 6.1 premières → < 6.1.176 6.1.176
Linux 5.15 premières → < 5.15.210 5.15.210
Linux 5.10 premières → < 5.10.259 5.10.259
Linux 3.18 Pas de correctif indiqué
Afficher l’autre branche
Produit Versions touchées Corrigé en
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Versions non publiées

Références

Chronologie

  1. Publiée
  2. Dernière modification

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