Answer in brief
CVE-2026-63922 records a Unknown severity vulnerability in ipv6: exthdrs: refresh nh after handling HAO option. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2026-63922 records a Unknown severity vulnerability in ipv6: exthdrs: refresh nh after handling HAO option. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=a831f5bbc89a9978795504be9e1ff412043f8f77 <b3ac54e5c905f86d22b502eacb5686a282c5659f || >=a831f5bbc89a9978795504be9e1ff412043f8f77 <f8aabed3ff3e986920cf02a2a2785e08e586b234 || >=a831f5bbc89a9978795504be9e1ff412043f8f77 <1a11eb7431e3d2882f5bd5939c5a9bbc65ccf4d1 || >=a831f5bbc89a9978795504be9e1ff412043f8f77 <12d957979e4a800167842f1b42be6a606d227ebe || >=a831f5bbc89a9978795504be9e1ff412043f8f77 <ff375ed1cba81392346c5bfbf0bb7a13b2946f99 || >=a831f5bbc89a9978795504be9e1ff412043f8f77 <751db1b802a067b7fff25880f4e9f9152a171538 || >=a831f5bbc89a9978795504be9e1ff412043f8f77 <9b6dcc0a39fd71752937f0b6b3973e1416085dcf || >=a831f5bbc89a9978795504be9e1ff412043f8f77 <f7b52afe3592eae66e160586b45a3f2242972c63 | b3ac54e5c905f86d22b502eacb5686a282c5659f, f8aabed3ff3e986920cf02a2a2785e08e586b234, 1a11eb7431e3d2882f5bd5939c5a9bbc65ccf4d1, 12d957979e4a800167842f1b42be6a606d227ebe, ff375ed1cba81392346c5bfbf0bb7a13b2946f99, 751db1b802a067b7fff25880f4e9f9152a171538, 9b6dcc0a39fd71752937f0b6b3973e1416085dcf, f7b52afe3592eae66e160586b45a3f2242972c63 |
| Linux/Linuxgeneric | 2.6.19 | Not reported |
Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=a831f5bbc89a9978795504be9e1ff412043f8f77 <b3ac54e5c905f86d22b502eacb5686a282c5659f || >=a831f5bbc89a9978795504be9e1ff412043f8f77 <f8aabed3ff3e986920cf02a2a2785e08e586b234 || >=a831f5bbc89a9978795504be9e1ff412043f8f77 <1a11eb7431e3d2882f5bd5939c5a9bbc65ccf4d1 || >=a831f5bbc89a9978795504be9e1ff412043f8f77 <12d957979e4a800167842f1b42be6a606d227ebe || >=a831f5bbc89a9978795504be9e1ff412043f8f77 <ff375ed1cba81392346c5bfbf0bb7a13b2946f99 || >=a831f5bbc89a9978795504be9e1ff412043f8f77 <751db1b802a067b7fff25880f4e9f9152a171538 || >=a831f5bbc89a9978795504be9e1ff412043f8f77 <9b6dcc0a39fd71752937f0b6b3973e1416085dcf || >=a831f5bbc89a9978795504be9e1ff412043f8f77 <f7b52afe3592eae66e160586b45a3f2242972c63 | b3ac54e5c905f86d22b502eacb5686a282c5659f, f8aabed3ff3e986920cf02a2a2785e08e586b234, 1a11eb7431e3d2882f5bd5939c5a9bbc65ccf4d1, 12d957979e4a800167842f1b42be6a606d227ebe, ff375ed1cba81392346c5bfbf0bb7a13b2946f99, 751db1b802a067b7fff25880f4e9f9152a171538, 9b6dcc0a39fd71752937f0b6b3973e1416085dcf, f7b52afe3592eae66e160586b45a3f2242972c63 |
| Linux/Linuxgeneric | 2.6.19 | Not reported |
Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.