CVE-2026-74597
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
ip6_tunnel: clear skb2->cb[] in ip6ip6_err()
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.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| e490d1d85cf5e191791979e5f260d32eb4f703a8 | affected | git | 44fe898df302e91c5ee5acbc71ffa74e78e6c183 | Unavailable | None listed |
| e490d1d85cf5e191791979e5f260d32eb4f703a8 | affected | git | 0dadb0620ab65949a8bc2439dd28ea3c942fe87d | Unavailable | None listed |
| e490d1d85cf5e191791979e5f260d32eb4f703a8 | affected | git | b6816536a2990c0db44a26130a03e40b441e829b | Unavailable | None listed |
| e490d1d85cf5e191791979e5f260d32eb4f703a8 | affected | git | 64e41736a26f37ab6215bc2e6df125df05aceb08 | Unavailable | None listed |
| e490d1d85cf5e191791979e5f260d32eb4f703a8 | affected | git | 484134e1eb07d700a73b1e4bbf3fb503e299be60 | Unavailable | None listed |
| e490d1d85cf5e191791979e5f260d32eb4f703a8 | affected | git | 4eb15c465337b18f44716c499cd6ad63eee0ad54 | Unavailable | None listed |
| e490d1d85cf5e191791979e5f260d32eb4f703a8 | affected | git | fbf40faa0414b753212494ad197542002e66ed9e | Unavailable | None listed |
| e490d1d85cf5e191791979e5f260d32eb4f703a8 | affected | git | f803c086399da277b5d0ff36a107d0f162751800 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 2.6.22 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 2.6.22 | Unavailable | None listed |
| 5.10.265 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.216 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.183 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.152 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.104 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.45 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.1.9 | unaffected | semver | Unavailable | 7.1.* | None listed |
| 7.2 | unaffected | original_commit_for_fix | Unavailable | * | None listed |