CVE-2026-80792
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)
ipv6: fix use-after-free in ip6_finish_output2()
In the Linux kernel, the following vulnerability has been resolved: ipv6: fix use-after-free in ip6_finish_output2() ip6_finish_output2() caches a pointer to the IPv6 destination address (daddr) before invoking lwtunnel_xmit(). The LWT-BPF transmit path or other encapsulation operations within lwtunnel_xmit() can reallocate the skb head, freeing the memory that daddr points to. When lwtunnel_xmit() returns LWTUNNEL_XMIT_CONTINUE, the function continues to use the stale daddr pointer to compute the nexthop and to look up or create the neighbour entry. This results in a use-after-free read, which can leak sensitive kernel data, pollute the neighbour table with arbitrary values, misdirect traffic, or crash the system. Fix this by re-fetching the IPv6 header and the destination address pointer after lwtunnel_xmit() returns LWTUNNEL_XMIT_CONTINUE, ensuring that the subsequent nexthop computation and neighbour lookup operate on valid memory.
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) |
|---|---|---|---|---|---|
| 4132c4ad00ddbf3a175ea0d2c775b662a32f4c85 | affected | git | 75e0a544ebe9af663ef53ca21e9e9185c51fb54a | Unavailable | None listed |
| e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2 | affected | git | c95f01b78266828a57060d754fcbfc92123a98ed | Unavailable | None listed |
| e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2 | affected | git | d960881b9312e781a3429aabceb223ce6b7c882f | Unavailable | None listed |
| e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2 | affected | git | 087ee0d914aaae929f1660c9ca878e367655ba1a | Unavailable | None listed |
| e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2 | affected | git | 3c770ac4e6f07af7c7b40c474a3efc61ffed7862 | Unavailable | None listed |
| e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2 | affected | git | 3dc98e5fe82d069dd29b124ffbdb679331dfea43 | Unavailable | None listed |
| e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2 | affected | git | 99219c82804f266189388e8bf1cf5135d10d5515 | Unavailable | None listed |
| e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2 | affected | git | 73a187384a8c8b983c7fea046d716b6752a1e7a3 | Unavailable | None listed |
| e415ed3a4b8b246ee5e9d109ff5153efcf96b9f2 | affected | git | d0d48d999b0eee6bb176ef4e39d9be868fa80f7e | Unavailable | None listed |
| 1598154fd28ffa4a55beae1970475fd6776554b6 | affected | git | Unavailable | Unavailable | None listed |
| 5.10.233 | affected | semver | 5.10.267 | Unavailable | None listed |
| 5.4.289 | affected | semver | 5.5 | 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) |
|---|---|---|---|---|---|
| 5.15 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.15 | Unavailable | None listed |
| 5.10.267 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.218 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.185 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.154 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.106 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.47 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.1.11 | unaffected | semver | Unavailable | 7.1.* | None listed |
| 7.2.1 | unaffected | semver | Unavailable | 7.2.* | None listed |
| 7.3 | unaffected | original_commit_for_fix | Unavailable | * | None listed |