CVE-2026-63922— ipv6: exthdrs: refresh nh after handling HAO option
Possible ATT&CK Techniques 1AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 16
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | a831f5bbc89a9978795504be9e1ff412043f8f77< f8aabed3ff3e986920cf02a2a2785e08e586b234 | affected |
a831f5bbc89a9978795504be9e1ff412043f8f77< 1a11eb7431e3d2882f5bd5939c5a9bbc65ccf4d1 | affected | ||
a831f5bbc89a9978795504be9e1ff412043f8f77< 12d957979e4a800167842f1b42be6a606d227ebe | affected | ||
a831f5bbc89a9978795504be9e1ff412043f8f77< ff375ed1cba81392346c5bfbf0bb7a13b2946f99 | affected | ||
a831f5bbc89a9978795504be9e1ff412043f8f77< 751db1b802a067b7fff25880f4e9f9152a171538 | affected | ||
a831f5bbc89a9978795504be9e1ff412043f8f77< 9b6dcc0a39fd71752937f0b6b3973e1416085dcf | affected | ||
a831f5bbc89a9978795504be9e1ff412043f8f77< f7b52afe3592eae66e160586b45a3f2242972c63 | affected | ||
2.6.19 | affected | ||
| … +8 more rows | |||
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-63922
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
ipv6: exthdrs: refresh nh after handling HAO option
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel 2.6.19版本存在安全漏洞，该漏洞源于在IPv6扩展头处理中，ip6_parse_tlv()函数缓存网络头部指针，但ipv6_dest_hao()可能调用pskb_expand_head()移动skb头部并导致缓存指针失效，从而可能引发越界读取或其他异常。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-63922
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-63922
请登录查看更多情报信息。
Patches & Fixes for CVE-2026-63922 (6)
Same Patch Batch · Linux · 2026-07-19 · 431 CVEs total
| CVE-2026-63795 | 10.0 CRITICAL | 9p: avoid putting oldfid in p9_client_walk() error path |
| CVE-2026-63984 | 9.8 CRITICAL | ipv6: rpl: fix hdrlen overflow in ipv6_rpl_srh_decompress() |
| CVE-2026-64000 | 9.8 CRITICAL | net: hsr: fix potential OOB access in supervision frame handling |
| CVE-2026-64150 | 9.8 CRITICAL | netfilter: nft_inner: release local_lock before re-enabling softirqs |
| CVE-2026-63924 | 9.8 CRITICAL | ipv6: exthdrs: refresh nh pointer after ipv6_hop_jumbo() |
| CVE-2026-64046 | 9.8 CRITICAL | net: tls: prevent chain-after-chain in plain text SG |
| CVE-2026-64047 | 9.8 CRITICAL | net: tls: fix off-by-one in sg_chain entry count for wrapped sk_msg ring |
| CVE-2026-63994 | 9.8 CRITICAL | tunnels: load network headers after skb_cow() in iptunnel_pmtud_build_icmp[v6]() |
| CVE-2026-63993 | 9.8 CRITICAL | vxlan: do not reuse cached ip_hdr() value after skb_tunnel_check_pmtu() |
| CVE-2026-64142 | 9.8 CRITICAL | ksmbd: close durable scavenger races against m_fp_list lookups |
| CVE-2026-64055 | 9.8 CRITICAL | net: ethernet: cortina: Carry over frag counter |
| CVE-2026-64136 | 9.8 CRITICAL | smb: client: protect tc_count increment in smb2_find_smb_sess_tcon_unlocked() |
| CVE-2026-64132 | 9.8 CRITICAL | ipv6: ioam: refresh hdr pointer before ioam6_event() |
| CVE-2026-53399 | 9.8 CRITICAL | nfsd: release layout stid on setlease failure |
| CVE-2026-64056 | 9.8 CRITICAL | net: ethernet: cortina: Make RX SKB per-port |
| CVE-2026-64125 | 9.8 CRITICAL | net: bcmgenet: keep RBUF EEE/PM disabled |
| CVE-2026-64122 | 9.8 CRITICAL | net/mlx5e: Fix use-after-free in mlx5e_tx_reporter_timeout_recover |
| CVE-2026-63800 | 9.8 CRITICAL | pNFS: Fix use-after-free in pnfs_update_layout() |
| CVE-2026-63857 | 9.8 CRITICAL | net: airoha: Do not read uninitialized fragment address in airoha_dev_xmit() |
| CVE-2026-63978 | 9.8 CRITICAL | net/handshake: Drain pending requests at net namespace exit |
Showing top 20 of 431 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-64600
xfs: resample the data fork mapping after cycling ILOCK - CVE-2026-64206
Bluetooth: L2CAP: cancel pending_rx_work before taking conn- - CVE-2026-64207
net/sched: dualpi2: fix GSO backlog accounting - CVE-2026-64205
i2c: i801: fix hardware state machine corruption in error pa - CVE-2026-64192
bpf: Reject BPF_MAP_TYPE_INODE_STORAGE creation if BPF LSM i
Same vendor: Linux
- CVE-2026-64600
xfs: resample the data fork mapping after cycling ILOCK - CVE-2026-64206
Bluetooth: L2CAP: cancel pending_rx_work before taking conn- - CVE-2026-64207
net/sched: dualpi2: fix GSO backlog accounting - CVE-2026-64205
i2c: i801: fix hardware state machine corruption in error pa - CVE-2026-64192
bpf: Reject BPF_MAP_TYPE_INODE_STORAGE creation if BPF LSM i
V. Comments for CVE-2026-63922
No comments yet