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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-53228 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/0bfa7bba1f41aaf5f0604dc712bb4701493e3aa0 kernel.org
https://git.kernel.org/stable/c/1132e5edc2866c3530be17622153a597095f0e43 kernel.org
https://git.kernel.org/stable/c/2fa49b2715e1bad12ce3b0fa64e234d9582c8193 kernel.org
https://git.kernel.org/stable/c/59f80c919713250fe5d25a4d9aea4e49580fa1d4 kernel.org
https://git.kernel.org/stable/c/9c67b44edb3598d234efae6e44649eb993c03da5 kernel.org
https://git.kernel.org/stable/c/cb658c2f5f7977c2a1c77c9f239f4bc8196edb5c kernel.org
https://git.kernel.org/stable/c/f0e42f0c4337b1f220de1ddd63f47197c7dee4de kernel.org
https://git.kernel.org/stable/c/fddd41445a0537b093e6b3f6232c9933cad1e48b kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-53228
NVD Published Date:
06/25/2026
NVD Last Modified:
06/25/2026
Source:
kernel.org