CVE-2026-46120
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_gre: Use cached t->net in ip6erspan_changelink().
In the Linux kernel, the following vulnerability has been resolved: ip6_gre: Use cached t->net in ip6erspan_changelink(). After commit 5e72ce3e3980 ("net: ipv6: Use link netns in newlink() of rtnl_link_ops"), ip6erspan_newlink() correctly resolves the per-netns ip6gre hash via link_net. ip6erspan_changelink() was not converted in that series and still uses dev_net(dev), which diverges from the device's creation netns after IFLA_NET_NS_FD migration. This re-inserts the tunnel into the wrong per-netns hash. The original netns keeps a stale entry. When that netns is later destroyed, ip6gre_exit_rtnl_net() walks the stale entry, producing a slab-use-after-free reported by KASAN, followed by a kernel BUG at net/core/dev.c (LIST_POISON1) in unregister_netdevice_many_notify(). Reachable from an unprivileged user namespace (unshare --user --map-root-user --net). ip6gre_changelink() earlier in the same file already uses the cached t->net; only ip6erspan_changelink() has the wrong shape.
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) |
|---|---|---|---|---|---|
| 2d665034f239412927b1e71329f20f001c92da09 | affected | git | 7bd0f2b162b426b343a114e1b329f0d8d14fdc6e | Unavailable | None listed |
| 2d665034f239412927b1e71329f20f001c92da09 | affected | git | 01b71ff2857d3598337de11e7840a8e3ff21553c | Unavailable | None listed |
| 2d665034f239412927b1e71329f20f001c92da09 | affected | git | 0fcf6731706f73494245a9c0d64f93bebf95bb51 | Unavailable | None listed |
| 2d665034f239412927b1e71329f20f001c92da09 | affected | git | eca62bb0569de4d43a4dac06a2092a9d4ca1d702 | Unavailable | None listed |
| 2d665034f239412927b1e71329f20f001c92da09 | affected | git | 311fdd26eb4443d43b909cc67a10f3a5fd1b21b2 | Unavailable | None listed |
| 2d665034f239412927b1e71329f20f001c92da09 | affected | git | e70cfb40c3a99b232cd42c6a6a10f0d8e039dc82 | Unavailable | None listed |
| 2d665034f239412927b1e71329f20f001c92da09 | affected | git | cf7fc624329e76c6394653d12353e1d033adea91 | Unavailable | None listed |
| 2d665034f239412927b1e71329f20f001c92da09 | affected | git | 1d324c2f43f70c965f25c58cc3611c779adbe47e | Unavailable | None listed |
| c6d72628352c949629af619b77b042e0fb5245e7 | affected | git | Unavailable | Unavailable | None listed |
| 4.16.12 | affected | semver | 4.17 | 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) |
|---|---|---|---|---|---|
| 4.17 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 4.17 | Unavailable | None listed |
| 5.10.258 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.209 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.175 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.140 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.88 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.30 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.0.7 | unaffected | semver | Unavailable | 7.0.* | None listed |
| 7.1 | unaffected | original_commit_for_fix | Unavailable | * | None listed |