Answer in brief
CVE-2026-63917 records a Unknown severity vulnerability in ip6: vti: Use ip6_tnl.net in vti6_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-2026-63917 records a Unknown severity vulnerability in ip6: vti: Use ip6_tnl.net in vti6_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.
A CVSS score is not reported in the current record. 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 | >=61220ab349485d911083d0b7990ccd3db6c63297 <0cdce7618464f7fb06f461e8f4ad575cb1d570f4 || >=61220ab349485d911083d0b7990ccd3db6c63297 <f5c68875e25f331e497ddfbe81e2d8163a87f136 || >=61220ab349485d911083d0b7990ccd3db6c63297 <d9c5eecdb3c740e65038651db7c686b10d76d1bc || >=61220ab349485d911083d0b7990ccd3db6c63297 <f1e89a943ee574d0f2f16246eb3f2d7330fdeb03 || >=61220ab349485d911083d0b7990ccd3db6c63297 <225b467e3b631f38be22e4b38062a1fed02fdd21 || >=61220ab349485d911083d0b7990ccd3db6c63297 <fc32be9ac2788524c6b24efd681cce7a6e731a92 || >=61220ab349485d911083d0b7990ccd3db6c63297 <ee1778ba0f5cb53be771f97017d01eb356c797bf || >=61220ab349485d911083d0b7990ccd3db6c63297 <11b326fb0a374f4654f9be22d0f0f7abd9f7d3fe | 0cdce7618464f7fb06f461e8f4ad575cb1d570f4, f5c68875e25f331e497ddfbe81e2d8163a87f136, d9c5eecdb3c740e65038651db7c686b10d76d1bc, f1e89a943ee574d0f2f16246eb3f2d7330fdeb03, 225b467e3b631f38be22e4b38062a1fed02fdd21, fc32be9ac2788524c6b24efd681cce7a6e731a92, ee1778ba0f5cb53be771f97017d01eb356c797bf, 11b326fb0a374f4654f9be22d0f0f7abd9f7d3fe |
| Linux/Linuxgeneric | 3.15 | Not reported |
Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: ip6: vti: Use ip6_tnl.net in vti6_changelink(). ip netns add ns1 ip netns add ns2 ip -n ns1 link add vti6_test type vti6 remote ::1 local ::2 key 7 ip -n ns1 link set vti6_test netns ns2 ip -n ns2 link set vti6_test type vti6 remote ::3 local ::4 key 9 ip netns del ns2 ip netns del ns1 [ 132.495484] ------------[ cut here ]------------ [ 132.497609] kernel BUG at net/core/dev.c:12376! Commit 61220ab34948 ("vti6: Enable namespace changing") dropped NETIF_F_NETNS_LOCAL from vti6 devices. A vti6 tunnel can then move through IFLA_NET_NS_FD. After the move dev_net(dev) points at the new netns while t->net stays at the creation netns. vti6_changelink() and vti6_update() still use dev_net(dev) and dev_net(t->dev). They unlink from one per netns hash and relink into another. The creation netns is left with a stale entry. cleanup_net() of that netns later walks freed memory. Reachable from an unprivileged user namespace (unshare --user --map-root-user --net). Cross tenant scope on container hosts.
Quoted source text, attributed separately from HOL analysis.
A CVSS score is not reported in the current record. 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 | >=61220ab349485d911083d0b7990ccd3db6c63297 <0cdce7618464f7fb06f461e8f4ad575cb1d570f4 || >=61220ab349485d911083d0b7990ccd3db6c63297 <f5c68875e25f331e497ddfbe81e2d8163a87f136 || >=61220ab349485d911083d0b7990ccd3db6c63297 <d9c5eecdb3c740e65038651db7c686b10d76d1bc || >=61220ab349485d911083d0b7990ccd3db6c63297 <f1e89a943ee574d0f2f16246eb3f2d7330fdeb03 || >=61220ab349485d911083d0b7990ccd3db6c63297 <225b467e3b631f38be22e4b38062a1fed02fdd21 || >=61220ab349485d911083d0b7990ccd3db6c63297 <fc32be9ac2788524c6b24efd681cce7a6e731a92 || >=61220ab349485d911083d0b7990ccd3db6c63297 <ee1778ba0f5cb53be771f97017d01eb356c797bf || >=61220ab349485d911083d0b7990ccd3db6c63297 <11b326fb0a374f4654f9be22d0f0f7abd9f7d3fe | 0cdce7618464f7fb06f461e8f4ad575cb1d570f4, f5c68875e25f331e497ddfbe81e2d8163a87f136, d9c5eecdb3c740e65038651db7c686b10d76d1bc, f1e89a943ee574d0f2f16246eb3f2d7330fdeb03, 225b467e3b631f38be22e4b38062a1fed02fdd21, fc32be9ac2788524c6b24efd681cce7a6e731a92, ee1778ba0f5cb53be771f97017d01eb356c797bf, 11b326fb0a374f4654f9be22d0f0f7abd9f7d3fe |
| Linux/Linuxgeneric | 3.15 | Not reported |
Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: ip6: vti: Use ip6_tnl.net in vti6_changelink(). ip netns add ns1 ip netns add ns2 ip -n ns1 link add vti6_test type vti6 remote ::1 local ::2 key 7 ip -n ns1 link set vti6_test netns ns2 ip -n ns2 link set vti6_test type vti6 remote ::3 local ::4 key 9 ip netns del ns2 ip netns del ns1 [ 132.495484] ------------[ cut here ]------------ [ 132.497609] kernel BUG at net/core/dev.c:12376! Commit 61220ab34948 ("vti6: Enable namespace changing") dropped NETIF_F_NETNS_LOCAL from vti6 devices. A vti6 tunnel can then move through IFLA_NET_NS_FD. After the move dev_net(dev) points at the new netns while t->net stays at the creation netns. vti6_changelink() and vti6_update() still use dev_net(dev) and dev_net(t->dev). They unlink from one per netns hash and relink into another. The creation netns is left with a stale entry. cleanup_net() of that netns later walks freed memory. Reachable from an unprivileged user namespace (unshare --user --map-root-user --net). Cross tenant scope on container hosts.
Quoted source text, attributed separately from HOL analysis.