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Permalink CVE-2026-63922
9.8 CRITICAL
  • CVSS version (CVSS): 3.1
  • Attack Vector (AV): Network (N)
  • Attack Complexity (AC): Low (L)
  • Privileges Required (PR): None (N)
  • User Interaction (UI): None (N)
  • Scope (S): Unchanged (U)
  • Confidentiality (C): High (H)
  • Integrity (I): High (H)
  • Availability (A): High (H)
  • Modified Attack Vector (MAV): Network (N)
  • Modified Attack Complexity (MAC): Low (L)
  • Modified Privileges Required (MPR): None (N)
  • Modified User Interaction (MUI): None (N)
  • Modified Confidentiality (MC): High (H)
  • Modified Scope (MS): Unchanged (U)
  • Modified Integrity (MI): High (H)
  • Modified Availability (MA): High (H)
created 6 days, 9 hours ago Activity log
  • Created & dismissed (max. allowed matches exceeded) suggestion 6 days, 9 hours ago
ipv6: exthdrs: refresh nh after handling HAO option

In the Linux kernel, the following vulnerability has been resolved: ipv6: exthdrs: refresh nh after handling HAO option ip6_parse_tlv() caches skb_network_header(skb) in nh while walking IPv6 TLVs. ipv6_dest_hao() may call pskb_expand_head() for a cloned skb, which can move the skb head and invalidate the cached network header pointer. Refresh nh after ipv6_dest_hao() returns so any trailing padding or TLVs are parsed from the current skb head. This matches the existing pattern used in ip6_parse_tlv() after helpers that can modify skb header storage.

Affected products

Linux
  • <12d957979e4a800167842f1b42be6a606d227ebe
  • ==2.6.19
  • =<6.18.*
  • =<7.0.*
  • <ff375ed1cba81392346c5bfbf0bb7a13b2946f99
  • <f8aabed3ff3e986920cf02a2a2785e08e586b234
  • =<6.12.*
  • <f7b52afe3592eae66e160586b45a3f2242972c63
  • <2.6.19
  • =<6.1.*
  • =<*
  • =<6.6.*
  • <1a11eb7431e3d2882f5bd5939c5a9bbc65ccf4d1
  • =<5.15.*
  • <9b6dcc0a39fd71752937f0b6b3973e1416085dcf
  • <751db1b802a067b7fff25880f4e9f9152a171538