Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 61220ab349485d911083d0b7990ccd3db6c63297 before 0cdce7618464f7fb06f461e8f4ad575cb1d570f4; affected 61220ab349485d911083d0b7990ccd3db6c63297 before f5c68875e25f331e497ddfbe81e2d8163a87f136; affected 61220ab349485d911083d0b7990ccd3db6c63297 before d9c5eecdb3c740e65038651db7c686b10d76d1bc; affected 61220ab349485d911083d0b7990ccd3db6c63297 before f1e89a943ee574d0f2f16246eb3f2d7330fdeb03; affected 61220ab349485d911083d0b7990ccd3db6c63297 before 225b467e3b631f38be22e4b38062a1fed02fdd21; affected 61220ab349485d911083d0b7990ccd3db6c63297 before fc32be9ac2788524c6b24efd681cce7a6e731a92; affected 61220ab349485d911083d0b7990ccd3db6c63297 before ee1778ba0f5cb53be771f97017d01eb356c797bf; affected 61220ab349485d911083d0b7990ccd3db6c63297 before 11b326fb0a374f4654f9be22d0f0f7abd9f7d3fe |
| Linux / Linux | affected 3.15; unaffected 0 before 3.15; unaffected 5.10.259 through 5.10.*; unaffected 5.15.210 through 5.15.*; unaffected 6.1.176 through 6.1.*; unaffected 6.6.143 through 6.6.*; unaffected 6.12.93 through 6.12.*; unaffected 6.18.35 through 6.18.*; unaffected 7.0.12 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/0cdce7618464f7fb06f461e8f4ad575cb1d570f4
- https://git.kernel.org/stable/c/f5c68875e25f331e497ddfbe81e2d8163a87f136
- https://git.kernel.org/stable/c/d9c5eecdb3c740e65038651db7c686b10d76d1bc
- https://git.kernel.org/stable/c/f1e89a943ee574d0f2f16246eb3f2d7330fdeb03
- https://git.kernel.org/stable/c/225b467e3b631f38be22e4b38062a1fed02fdd21
- https://git.kernel.org/stable/c/fc32be9ac2788524c6b24efd681cce7a6e731a92
- https://git.kernel.org/stable/c/ee1778ba0f5cb53be771f97017d01eb356c797bf
- https://git.kernel.org/stable/c/11b326fb0a374f4654f9be22d0f0f7abd9f7d3fe
ADP enrichment
No English description supplied.
No references supplied.