CVE-2022-49865
ipv6: addrlabel: fix infoleak when sending struct ifaddrlblmsg to network
In the Linux kernel, the following vulnerability has been resolved: ipv6: addrlabel: fix infoleak when sending struct ifaddrlblmsg to network When copying a `struct ifaddrlblmsg` to the network, __ifal_reserved remained uninitialized, resulting in a 1-byte infoleak: BUG: KMSAN: kernel-network-infoleak in __netdev_start_xmit ./include/linux/netdevice.h:4841 __netdev_start_xmit ./include/linux/netdevice.h:4841 netdev_start_xmit ./include/linux/netdevice.h:4857 xmit_one net/core/dev.c:3590 dev_hard_start_xmit+0x1dc/0x800 net/core/dev.c:3606 __dev_queue_xmit+0x17e8/0x4350 net/core/dev.c:4256 dev_queue_xmit ./include/linux/netdevice.h:3009 __netlink_deliver_tap_skb net/netlink/af_netlink.c:307 __netlink_deliver_tap+0x728/0xad0 net/netlink/af_netlink.c:325 netlink_deliver_tap net/netlink/af_netlink.c:338 __netlink_sendskb net/netlink/af_netlink.c:1263 netlink_sendskb+0x1d9/0x200 net/netlink/af_netlink.c:1272 netlink_unicast+0x56d/0xf50 net/netlink/af_netlink.c:1360 nlmsg_unicast ./include/net/netlink.h:1061 rtnl_unicast+0x5a/0x80 net/core/rtnetlink.c:758 ip6addrlbl_get+0xfad/0x10f0 net/ipv6/addrlabel.c:628 rtnetlink_rcv_msg+0xb33/0x1570 net/core/rtnetlink.c:6082 ... Uninit was created at: slab_post_alloc_hook+0x118/0xb00 mm/slab.h:742 slab_alloc_node mm/slub.c:3398 __kmem_cache_alloc_node+0x4f2/0x930 mm/slub.c:3437 __do_kmalloc_node mm/slab_common.c:954 __kmalloc_node_track_caller+0x117/0x3d0 mm/slab_common.c:975 kmalloc_reserve net/core/skbuff.c:437 __alloc_skb+0x27a/0xab0 net/core/skbuff.c:509 alloc_skb ./include/linux/skbuff.h:1267 nlmsg_new ./include/net/netlink.h:964 ip6addrlbl_get+0x490/0x10f0 net/ipv6/addrlabel.c:608 rtnetlink_rcv_msg+0xb33/0x1570 net/core/rtnetlink.c:6082 netlink_rcv_skb+0x299/0x550 net/netlink/af_netlink.c:2540 rtnetlink_rcv+0x26/0x30 net/core/rtnetlink.c:6109 netlink_unicast_kernel net/netlink/af_netlink.c:1319 netlink_unicast+0x9ab/0xf50 net/netlink/af_netlink.c:1345 netlink_sendmsg+0xebc/0x10f0 net/netlink/af_netlink.c:1921 ... This patch ensures that the reserved field is always initialized.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Linux Linux |
≥ 2a8cc6c89039e0530a3335954253b76ed0f9339a; < 568a47ff756f913e8b374c2af9d22cd2c772c744 (affected, git) ≥ 2a8cc6c89039e0530a3335954253b76ed0f9339a; < 0f85b7ae7c4b5d7b4bbf7ac653a733c181a8a2bf (affected, git) ≥ 2a8cc6c89039e0530a3335954253b76ed0f9339a; < 6d26d0587abccb9835382a0b53faa7b9b1cd83e3 (affected, git) ≥ 2a8cc6c89039e0530a3335954253b76ed0f9339a; < 58cd7fdc8c1e6c7873acc08f190069fed88d1c12 (affected, git) ≥ 2a8cc6c89039e0530a3335954253b76ed0f9339a; < a033b86c7f7621fde31f0364af8986f43b44914f (affected, git) ≥ 2a8cc6c89039e0530a3335954253b76ed0f9339a; < 2acb2779b147decd300c117683d5a32ce61c75d6 (affected, git) ≥ 2a8cc6c89039e0530a3335954253b76ed0f9339a; < 49e92ba5ecd7d72ba369dde2ccff738edd028a47 (affected, git) ≥ 2a8cc6c89039e0530a3335954253b76ed0f9339a; < c23fb2c82267638f9d206cb96bb93e1f93ad7828 (affected, git) Other versions: unaffected |
CNA: Linux |
| Linux Linux |
2.6.25 (affected) ≥ 0; < 2.6.25 (unaffected, semver) ≥ 4.9.334; ≤ 4.9.* (unaffected, semver) ≥ 4.14.300; ≤ 4.14.* (unaffected, semver) ≥ 4.19.267; ≤ 4.19.* (unaffected, semver) ≥ 5.4.225; ≤ 5.4.* (unaffected, semver) ≥ 5.10.155; ≤ 5.10.* (unaffected, semver) ≥ 5.15.79; ≤ 5.15.* (unaffected, semver) ≥ 6.0.9; ≤ 6.0.* (unaffected, semver) ≥ 6.1; ≤ * (unaffected, original_commit_for_fix) Other versions: affected |
CNA: Linux |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
No CVSS assessment reported. An unscored record is not a low-severity determination.
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://git.kernel.org/stable/c/568a47ff756f913e8b374c2af9d22cd2c772c744CNA: Linux
- https://git.kernel.org/stable/c/0f85b7ae7c4b5d7b4bbf7ac653a733c181a8a2bfCNA: Linux
- https://git.kernel.org/stable/c/6d26d0587abccb9835382a0b53faa7b9b1cd83e3CNA: Linux
- https://git.kernel.org/stable/c/58cd7fdc8c1e6c7873acc08f190069fed88d1c12CNA: Linux
- https://git.kernel.org/stable/c/a033b86c7f7621fde31f0364af8986f43b44914fCNA: Linux
- https://git.kernel.org/stable/c/2acb2779b147decd300c117683d5a32ce61c75d6CNA: Linux
- https://git.kernel.org/stable/c/49e92ba5ecd7d72ba369dde2ccff738edd028a47CNA: Linux
- https://git.kernel.org/stable/c/c23fb2c82267638f9d206cb96bb93e1f93ad7828CNA: Linux
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