cbcvebase.
CVE-2024-26615
published 2024-03-11

CVE-2024-26615: In the Linux kernel, the following vulnerability has been resolved: net/smc: fix illegal rmb_desc access in SMC-D connection dump A crash was found when…

PriorityP420medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.26%
17.3th percentile
In the Linux kernel, the following vulnerability has been resolved: net/smc: fix illegal rmb_desc access in SMC-D connection dump A crash was found when dumping SMC-D connections. It can be reproduced by following steps: - run nginx/wrk test: smc_run nginx smc_run wrk -t 16 -c 1000 -d -H 'Connection: Close' - continuously dump SMC-D connections in parallel: watch -n 1 'smcss -D' BUG: kernel NULL pointer dereference, address: 0000000000000030 CPU: 2 PID: 7204 Comm: smcss Kdump: loaded Tainted: G E 6.7.0+ #55 RIP: 0010:__smc_diag_dump.constprop.0+0x5e5/0x620 [smc_diag] Call Trace: ? __die+0x24/0x70 ? page_fault_oops+0x66/0x150 ? exc_page_fault+0x69/0x140 ? asm_exc_page_fault+0x26/0x30 ? __smc_diag_dump.constprop.0+0x5e5/0x620 [smc_diag] ? __kmalloc_node_track_caller+0x35d/0x430 ? __alloc_skb+0x77/0x170 smc_diag_dump_proto+0xd0/0xf0 [smc_diag] smc_diag_dump+0x26/0x60 [smc_diag] netlink_dump+0x19f/0x320 __netlink_dump_start+0x1dc/0x300 smc_diag_handler_dump+0x6a/0x80 [smc_diag] ? __pfx_smc_diag_dump+0x10/0x10 [smc_diag] sock_diag_rcv_msg+0x121/0x140 ? __pfx_sock_diag_rcv_msg+0x10/0x10 netlink_rcv_skb+0x5a/0x110 sock_diag_rcv+0x28/0x40 netlink_unicast+0x22a/0x330 netlink_sendmsg+0x1f8/0x420 __sock_sendmsg+0xb0/0xc0 ____sys_sendmsg+0x24e/0x300 ? copy_msghdr_from_user+0x62/0x80 ___sys_sendmsg+0x7c/0xd0 ? __do_fault+0x34/0x160 ? do_read_fault+0x5f/0x100 ? do_fault+0xb0/0x110 ? __handle_mm_fault+0x2b0/0x6c0 __sys_sendmsg+0x4d/0x80 do_syscall_64+0x69/0x180 entry_SYSCALL_64_after_hwframe+0x6e/0x76 It is possible that the connection is in process of being established when we dump it. Assumed that the connection has been registered in a link group by smc_conn_create() but the rmb_desc has not yet been initialized by smc_buf_create(), thus causing the illegal access to conn->rmb_desc. So fix it by checking before dump.

Affected

24 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.76-1 (bookworm)linux 6.1.76-1 (bookworm)
linuxlinux
linuxlinux>= 4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d < 27aea64838914c6122db5b8bd4bed865c9736f2227aea64838914c6122db5b8bd4bed865c9736f22
linuxlinux>= 4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d < 1fea9969b81c67d0cb1611d1b8b7d19049d937be1fea9969b81c67d0cb1611d1b8b7d19049d937be
linuxlinux>= 4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d < 5fed92ca32eafbfae8b6bee8ca34cca71c6a8b6d5fed92ca32eafbfae8b6bee8ca34cca71c6a8b6d
linuxlinux>= 4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d < 68b888d51ac82f2b96bf5e077a31d76afcdef25a68b888d51ac82f2b96bf5e077a31d76afcdef25a
linuxlinux>= 4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d < 6994dba06321e3c48fdad0ba796a063d9d82183a6994dba06321e3c48fdad0ba796a063d9d82183a
linuxlinux>= 4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d < a164c2922675d7051805cdaf2b07daffe44f20d9a164c2922675d7051805cdaf2b07daffe44f20d9
linuxlinux>= 4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d < 8f3f9186e5bb96a9c9654c41653210e3ea7e48a68f3f9186e5bb96a9c9654c41653210e3ea7e48a6
linuxlinux>= 4b1b7d3b30a6d32ac1a1dcede284e76ef8a8542d < dbc153fd3c142909e564bb256da087e13fbf239cdbc153fd3c142909e564bb256da087e13fbf239c
linuxlinux_kernel
linuxlinux_kernel>= 0 < 5.10.216-15.10.216-1
linuxlinux_kernel>= 0 < 6.1.76-16.1.76-1
linuxlinux_kernel>= 0 < 6.6.15-16.6.15-1
linuxlinux_kernel>= 0 < 6.6.15-16.6.15-1
linuxlinux_kernel>= 0 < 5.4.0-181.2015.4.0-181.201
linuxlinux_kernel>= 0 < 5.15.0-106.1165.15.0-106.116
linuxlinux_kernel>= 4.19 < 4.19.3074.19.307
linuxlinux_kernel>= 4.20 < 5.4.2695.4.269
linuxlinux_kernel>= 5.11 < 5.15.1495.15.149
linuxlinux_kernel>= 5.16 < 6.1.766.1.76
linuxlinux_kernel>= 5.5 < 5.10.2105.10.210
linuxlinux_kernel>= 6.2 < 6.6.156.6.15
linuxlinux_kernel>= 6.7 < 6.7.36.7.3

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv7.5HIGH
vendor_ubuntu6.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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