Answer in brief
CVE-2026-46120 records a High severity (CVSS 7.8) vulnerability in ip6_gre: Use cached t->net in ip6erspan_changelink().. 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-2026-46120 records a High severity (CVSS 7.8) vulnerability in ip6_gre: Use cached t->net in ip6erspan_changelink().. 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.
CVSS is 7.8. 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 | >=2d665034f239412927b1e71329f20f001c92da09 <7bd0f2b162b426b343a114e1b329f0d8d14fdc6e || >=2d665034f239412927b1e71329f20f001c92da09 <01b71ff2857d3598337de11e7840a8e3ff21553c || >=2d665034f239412927b1e71329f20f001c92da09 <0fcf6731706f73494245a9c0d64f93bebf95bb51 || >=2d665034f239412927b1e71329f20f001c92da09 <eca62bb0569de4d43a4dac06a2092a9d4ca1d702 || >=2d665034f239412927b1e71329f20f001c92da09 <311fdd26eb4443d43b909cc67a10f3a5fd1b21b2 || >=2d665034f239412927b1e71329f20f001c92da09 <e70cfb40c3a99b232cd42c6a6a10f0d8e039dc82 || >=2d665034f239412927b1e71329f20f001c92da09 <cf7fc624329e76c6394653d12353e1d033adea91 || >=2d665034f239412927b1e71329f20f001c92da09 <1d324c2f43f70c965f25c58cc3611c779adbe47e || c6d72628352c949629af619b77b042e0fb5245e7 || >=4.16.12 <4.17 | 7bd0f2b162b426b343a114e1b329f0d8d14fdc6e, 01b71ff2857d3598337de11e7840a8e3ff21553c, 0fcf6731706f73494245a9c0d64f93bebf95bb51, eca62bb0569de4d43a4dac06a2092a9d4ca1d702, 311fdd26eb4443d43b909cc67a10f3a5fd1b21b2, e70cfb40c3a99b232cd42c6a6a10f0d8e039dc82, cf7fc624329e76c6394653d12353e1d033adea91, 1d324c2f43f70c965f25c58cc3611c779adbe47e, 4.17 |
| Linux/Linuxgeneric | 4.17 | Not reported |
Published upstream
May 28, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jun 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 24, 2026
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.
Quoted source text, attributed separately from HOL analysis.
CVSS is 7.8. 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 | >=2d665034f239412927b1e71329f20f001c92da09 <7bd0f2b162b426b343a114e1b329f0d8d14fdc6e || >=2d665034f239412927b1e71329f20f001c92da09 <01b71ff2857d3598337de11e7840a8e3ff21553c || >=2d665034f239412927b1e71329f20f001c92da09 <0fcf6731706f73494245a9c0d64f93bebf95bb51 || >=2d665034f239412927b1e71329f20f001c92da09 <eca62bb0569de4d43a4dac06a2092a9d4ca1d702 || >=2d665034f239412927b1e71329f20f001c92da09 <311fdd26eb4443d43b909cc67a10f3a5fd1b21b2 || >=2d665034f239412927b1e71329f20f001c92da09 <e70cfb40c3a99b232cd42c6a6a10f0d8e039dc82 || >=2d665034f239412927b1e71329f20f001c92da09 <cf7fc624329e76c6394653d12353e1d033adea91 || >=2d665034f239412927b1e71329f20f001c92da09 <1d324c2f43f70c965f25c58cc3611c779adbe47e || c6d72628352c949629af619b77b042e0fb5245e7 || >=4.16.12 <4.17 | 7bd0f2b162b426b343a114e1b329f0d8d14fdc6e, 01b71ff2857d3598337de11e7840a8e3ff21553c, 0fcf6731706f73494245a9c0d64f93bebf95bb51, eca62bb0569de4d43a4dac06a2092a9d4ca1d702, 311fdd26eb4443d43b909cc67a10f3a5fd1b21b2, e70cfb40c3a99b232cd42c6a6a10f0d8e039dc82, cf7fc624329e76c6394653d12353e1d033adea91, 1d324c2f43f70c965f25c58cc3611c779adbe47e, 4.17 |
| Linux/Linuxgeneric | 4.17 | Not reported |
Published upstream
May 28, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jun 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 24, 2026
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.
Quoted source text, attributed separately from HOL analysis.