Executive Summary



This vulnerability is currently undergoing analysis and not all information is available. Please check back soon to view the completed vulnerability summary
Informations
Name CVE-2022-49865 First vendor Publication 2025-05-01
Vendor Cve Last vendor Modification 2025-05-01

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score N/A Attack Range N/A
Cvss Impact Score N/A Attack Complexity N/A
Cvss Expoit Score N/A Authentication N/A
Calculate full CVSS 2.0 Vectors scores

Detail

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.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-49865

Sources (Detail)

https://git.kernel.org/stable/c/0f85b7ae7c4b5d7b4bbf7ac653a733c181a8a2bf
https://git.kernel.org/stable/c/2acb2779b147decd300c117683d5a32ce61c75d6
https://git.kernel.org/stable/c/49e92ba5ecd7d72ba369dde2ccff738edd028a47
https://git.kernel.org/stable/c/568a47ff756f913e8b374c2af9d22cd2c772c744
https://git.kernel.org/stable/c/58cd7fdc8c1e6c7873acc08f190069fed88d1c12
https://git.kernel.org/stable/c/6d26d0587abccb9835382a0b53faa7b9b1cd83e3
https://git.kernel.org/stable/c/a033b86c7f7621fde31f0364af8986f43b44914f
https://git.kernel.org/stable/c/c23fb2c82267638f9d206cb96bb93e1f93ad7828
Source Url

Alert History

If you want to see full details history, please login or register.
0
Date Informations
2025-05-27 02:12:29
  • First insertion