CVE-2022-49862

Summary

In the Linux kernel, the following vulnerability has been resolved:

tipc: fix the msg->req tlv len check in tipc_nl_compat_name_table_dump_header

This is a follow-up for commit 974cb0e3e7c9 ("tipc: fix uninit-value in tipc_nl_compat_name_table_dump") where it should have type casted sizeof(..) to int to work when TLV_GET_DATA_LEN() returns a negative value.

syzbot reported a call trace because of it:

BUG: KMSAN: uninit-value in … tipc_nl_compat_name_table_dump+0x841/0xea0 net/tipc/netlink_compat.c:934 __tipc_nl_compat_dumpit+0xab2/0x1320 net/tipc/netlink_compat.c:238 tipc_nl_compat_dumpit+0x991/0xb50 net/tipc/netlink_compat.c:321 tipc_nl_compat_recv+0xb6e/0x1640 net/tipc/netlink_compat.c:1324 genl_family_rcv_msg_doit net/netlink/genetlink.c:731 [inline] genl_family_rcv_msg net/netlink/genetlink.c:775 [inline] genl_rcv_msg+0x103f/0x1260 net/netlink/genetlink.c:792 netlink_rcv_skb+0x3a5/0x6c0 net/netlink/af_netlink.c:2501 genl_rcv+0x3c/0x50 net/netlink/genetlink.c:803 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0xf3b/0x1270 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x1288/0x1440 net/netlink/af_netlink.c:1921 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline]

Affected Software

VendorProductVersion RangeStatus
LinuxLinux4c559fb7e111077b56f62ccf833a52d8169cde19 < 082707d3df191bf5bb8801d43e4ce3dea39ca173affected
LinuxLinux2aae1723dea1235ffef183daf0694805297424f6 < a0ead1d648df9c456baec832b494513ef405949aaffected
LinuxLinux2d5fc1d492d194aa2986c5a9d8a48a60e9143a72 < 55a253a6753a603e80b95932ca971ba514aa6ce7affected
LinuxLinux974cb0e3e7c963ced06c4e32c5b2884173fa5e01 < 36769b9477491a7af6635863bd950309c1e1b96caffected
LinuxLinux974cb0e3e7c963ced06c4e32c5b2884173fa5e01 < f31dd158580940938f77514b87337a777520185aaffected
LinuxLinux974cb0e3e7c963ced06c4e32c5b2884173fa5e01 < 301caa06091af4d5cf056ac8249cbda4e6029c6aaffected
LinuxLinux974cb0e3e7c963ced06c4e32c5b2884173fa5e01 < 6cee2c60bd168279852ac7dbe54c2b70d1028644affected
LinuxLinux974cb0e3e7c963ced06c4e32c5b2884173fa5e01 < 1c075b192fe41030457cd4a5f7dea730412bca40affected
LinuxLinuxc25352f9ad5dffb4de95069e67891e2aa2e99e50affected
LinuxLinux5486e8d46560ca2b4d86cbd7d3a66d9913b2ac65affected
LinuxLinux4.9.152 < 4.9.334affected
LinuxLinux4.14.95 < 4.14.300affected
LinuxLinux4.19.17 < 4.19.267affected
LinuxLinux4.4.172 < 4.5affected
LinuxLinux4.20.4 < 4.21affected
LinuxLinux5.0affected
LinuxLinux0 < 5.0unaffected
LinuxLinux4.9.334 <= 4.9.*unaffected
LinuxLinux4.14.300 <= 4.14.*unaffected
LinuxLinux4.19.267 <= 4.19.*unaffected
LinuxLinux5.4.225 <= 5.4.*unaffected
LinuxLinux5.10.155 <= 5.10.*unaffected
LinuxLinux5.15.79 <= 5.15.*unaffected
LinuxLinux6.0.9 <= 6.0.*unaffected
LinuxLinux6.1 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References