CVE-2022-48855: In the Linux kernel, the following vulnerability has been resolved: sctp: fix kernel-infoleak for SCTP sockets syzbot reported a kernel infoleak [1] of 4…

PriorityP430high7.1CVSS 3.1

AVLACLPRLUINSUCHINAH

EPSS

0.23%

14.1th percentile

In the Linux kernel, the following vulnerability has been resolved: sctp: fix kernel-infoleak for SCTP sockets syzbot reported a kernel infoleak [1] of 4 bytes. After analysis, it turned out r->idiag_expires is not initialized if inet_sctp_diag_fill() calls inet_diag_msg_common_fill() Make sure to clear idiag_timer/idiag_retrans/idiag_expires and let inet_diag_msg_sctpasoc_fill() fill them again if needed. [1] BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:121 [inline] BUG: KMSAN: kernel-infoleak in copyout lib/iov_iter.c:154 [inline] BUG: KMSAN: kernel-infoleak in _copy_to_iter+0x6ef/0x25a0 lib/iov_iter.c:668 instrument_copy_to_user include/linux/instrumented.h:121 [inline] copyout lib/iov_iter.c:154 [inline] _copy_to_iter+0x6ef/0x25a0 lib/iov_iter.c:668 copy_to_iter include/linux/uio.h:162 [inline] simple_copy_to_iter+0xf3/0x140 net/core/datagram.c:519 __skb_datagram_iter+0x2d5/0x11b0 net/core/datagram.c:425 skb_copy_datagram_iter+0xdc/0x270 net/core/datagram.c:533 skb_copy_datagram_msg include/linux/skbuff.h:3696 [inline] netlink_recvmsg+0x669/0x1c80 net/netlink/af_netlink.c:1977 sock_recvmsg_nosec net/socket.c:948 [inline] sock_recvmsg net/socket.c:966 [inline] __sys_recvfrom+0x795/0xa10 net/socket.c:2097 __do_sys_recvfrom net/socket.c:2115 [inline] __se_sys_recvfrom net/socket.c:2111 [inline] __x64_sys_recvfrom+0x19d/0x210 net/socket.c:2111 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x44/0xae Uninit was created at: slab_post_alloc_hook mm/slab.h:737 [inline] slab_alloc_node mm/slub.c:3247 [inline] __kmalloc_node_track_caller+0xe0c/0x1510 mm/slub.c:4975 kmalloc_reserve net/core/skbuff.c:354 [inline] __alloc_skb+0x545/0xf90 net/core/skbuff.c:426 alloc_skb include/linux/skbuff.h:1158 [inline] netlink_dump+0x3e5/0x16c0 net/netlink/af_netlink.c:2248 __netlink_dump_start+0xcf8/0xe90 net/netlink/af_netlink.c:2373 netlink_dump_start incl

Affected

21 ranges

Vendor	Product	Version range	Fixed in
debian	linux	< linux 5.16.18-1 (bookworm)	linux 5.16.18-1 (bookworm)
linux	linux	—	—
linux	linux	>= 8f840e47f190cbe61a96945c13e9551048d42cef < 3fc0fd724d199e061432b66a8d85b7d48fe485f7	3fc0fd724d199e061432b66a8d85b7d48fe485f7
linux	linux	>= 8f840e47f190cbe61a96945c13e9551048d42cef < 41a2864cf719c17294f417726edd411643462ab8	41a2864cf719c17294f417726edd411643462ab8
linux	linux	>= 8f840e47f190cbe61a96945c13e9551048d42cef < 2d8fa3fdf4542a2174a72d92018f488d65d848c5	2d8fa3fdf4542a2174a72d92018f488d65d848c5
linux	linux	>= 8f840e47f190cbe61a96945c13e9551048d42cef < bbf59d7ae558940cfa2b36a287fd1e88d83f89f8	bbf59d7ae558940cfa2b36a287fd1e88d83f89f8
linux	linux	>= 8f840e47f190cbe61a96945c13e9551048d42cef < b7e4d9ba2ddb78801488b4c623875b81fb46b545	b7e4d9ba2ddb78801488b4c623875b81fb46b545
linux	linux	>= 8f840e47f190cbe61a96945c13e9551048d42cef < 1502f15b9f29c41883a6139f2923523873282a83	1502f15b9f29c41883a6139f2923523873282a83
linux	linux	>= 8f840e47f190cbe61a96945c13e9551048d42cef < d828b0fe6631f3ae8709ac9a10c77c5836c76a08	d828b0fe6631f3ae8709ac9a10c77c5836c76a08
linux	linux	>= 8f840e47f190cbe61a96945c13e9551048d42cef < 633593a808980f82d251d0ca89730d8bb8b0220c	633593a808980f82d251d0ca89730d8bb8b0220c
linux	linux_kernel	>= 0 < 5.10.106-1	5.10.106-1
linux	linux_kernel	>= 0 < 5.16.18-1	5.16.18-1
linux	linux_kernel	>= 0 < 5.16.18-1	5.16.18-1
linux	linux_kernel	>= 0 < 5.16.18-1	5.16.18-1
linux	linux_kernel	>= 4.10 < 4.14.272	4.14.272
linux	linux_kernel	>= 4.15 < 4.19.235	4.19.235
linux	linux_kernel	>= 4.20 < 5.4.185	5.4.185
linux	linux_kernel	>= 4.7 < 4.9.307	4.9.307
linux	linux_kernel	>= 5.11 < 5.15.29	5.15.29
linux	linux_kernel	>= 5.16 < 5.16.15	5.16.15
linux	linux_kernel	>= 5.5 < 5.10.106	5.10.106

CVSS provenance

nvdv3.17.1HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

osv7.1HIGH

vendor_debian7.1HIGH

vendor_redhat7.1HIGH

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