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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-74597 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: ip6_tunnel: clear skb2->cb[] in ip6ip6_err() ip6ip6_err() clones an outer IPv6 ICMP error skb, pulls it to the quoted inner IPv6 packet, and then passes the clone to icmpv6_send(). The clone still carries the outer packet's inet6_skb_parm in skb->cb. If the outer packet had a Home Address Option, IP6CB(skb2)->dsthao remains non-zero after skb_pull(). icmpv6_send() later calls mip6_addr_swap(), which uses that stale dsthao offset against the quoted inner packet. A malformed inner destination-options header can then make the HAO lookup and address swap run past the end of the quoted packet and corrupt skb_shared_info. Clear skb2->cb[] before pulling the quoted inner IPv6 packet so the reply path does not reuse metadata left by the outer IPv6 stack.


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.

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/0dadb0620ab65949a8bc2439dd28ea3c942fe87d kernel.org
https://git.kernel.org/stable/c/44fe898df302e91c5ee5acbc71ffa74e78e6c183 kernel.org
https://git.kernel.org/stable/c/484134e1eb07d700a73b1e4bbf3fb503e299be60 kernel.org
https://git.kernel.org/stable/c/4eb15c465337b18f44716c499cd6ad63eee0ad54 kernel.org
https://git.kernel.org/stable/c/64e41736a26f37ab6215bc2e6df125df05aceb08 kernel.org
https://git.kernel.org/stable/c/b6816536a2990c0db44a26130a03e40b441e829b kernel.org
https://git.kernel.org/stable/c/f803c086399da277b5d0ff36a107d0f162751800 kernel.org
https://git.kernel.org/stable/c/fbf40faa0414b753212494ad197542002e66ed9e kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-74597
NVD Published Date:
08/22/2026
NVD Last Modified:
08/22/2026
Source:
kernel.org