cbcvebase.
CVE-2022-49450
published 2025-02-26

CVE-2022-49450: In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix listen() setting the bar too high for the prealloc rings AF_RXRPC's listen()…

PriorityP419medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.29%
21.3th percentile
In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix listen() setting the bar too high for the prealloc rings AF_RXRPC's listen() handler lets you set the backlog up to 32 (if you bump up the sysctl), but whilst the preallocation circular buffers have 32 slots in them, one of them has to be a dead slot because we're using CIRC_CNT(). This means that listen(rxrpc_sock, 32) will cause an oops when the socket is closed because rxrpc_service_prealloc_one() allocated one too many calls and rxrpc_discard_prealloc() won't then be able to get rid of them because it'll think the ring is empty. rxrpc_release_calls_on_socket() then tries to abort them, but oopses because call->peer isn't yet set. Fix this by setting the maximum backlog to RXRPC_BACKLOG_MAX - 1 to match the ring capacity. BUG: kernel NULL pointer dereference, address: 0000000000000086 ... RIP: 0010:rxrpc_send_abort_packet+0x73/0x240 [rxrpc] Call Trace: ? __wake_up_common_lock+0x7a/0x90 ? rxrpc_notify_socket+0x8e/0x140 [rxrpc] ? rxrpc_abort_call+0x4c/0x60 [rxrpc] rxrpc_release_calls_on_socket+0x107/0x1a0 [rxrpc] rxrpc_release+0xc9/0x1c0 [rxrpc] __sock_release+0x37/0xa0 sock_close+0x11/0x20 __fput+0x89/0x240 task_work_run+0x59/0x90 do_exit+0x319/0xaa0

Affected

23 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 5.18.5-1 (bookworm)linux 5.18.5-1 (bookworm)
linuxlinux——
linuxlinux>= 00e907127e6f86d0f9b122d9b4347a8aa09a8b61 < 61fb38cfbb1d54d3dafd0c25752f684b3cd00b3261fb38cfbb1d54d3dafd0c25752f684b3cd00b32
linuxlinux>= 00e907127e6f86d0f9b122d9b4347a8aa09a8b61 < 616f76498d5ddf26b997caf64a95cda3c8a55533616f76498d5ddf26b997caf64a95cda3c8a55533
linuxlinux>= 00e907127e6f86d0f9b122d9b4347a8aa09a8b61 < 4a3a78b7918bdd723d8c7c9786522ca969bffcc44a3a78b7918bdd723d8c7c9786522ca969bffcc4
linuxlinux>= 00e907127e6f86d0f9b122d9b4347a8aa09a8b61 < 91b34bf0409f43bb60453bab23c5beadd726d02291b34bf0409f43bb60453bab23c5beadd726d022
linuxlinux>= 00e907127e6f86d0f9b122d9b4347a8aa09a8b61 < 5b4826657d36c218e9f08e8d3223b0edce3de88f5b4826657d36c218e9f08e8d3223b0edce3de88f
linuxlinux>= 00e907127e6f86d0f9b122d9b4347a8aa09a8b61 < b3a9b227d5e7467b8518160ff034ea22bb9de573b3a9b227d5e7467b8518160ff034ea22bb9de573
linuxlinux>= 00e907127e6f86d0f9b122d9b4347a8aa09a8b61 < 369de57492c4f1a42563c5a3bd365822ca3bfc79369de57492c4f1a42563c5a3bd365822ca3bfc79
linuxlinux>= 00e907127e6f86d0f9b122d9b4347a8aa09a8b61 < e198f1930050e3115c80b67d9249f80f98a27c67e198f1930050e3115c80b67d9249f80f98a27c67
linuxlinux>= 00e907127e6f86d0f9b122d9b4347a8aa09a8b61 < 88e22159750b0d55793302eeed8ee603f5c1a95c88e22159750b0d55793302eeed8ee603f5c1a95c
linuxlinux_kernel>= 0 < 5.10.127-15.10.127-1
linuxlinux_kernel>= 0 < 5.18.5-15.18.5-1
linuxlinux_kernel>= 0 < 5.18.5-15.18.5-1
linuxlinux_kernel>= 0 < 5.18.5-15.18.5-1
linuxlinux_kernel>= 4.10 < 4.14.2834.14.283
linuxlinux_kernel>= 4.15 < 4.19.2474.19.247
linuxlinux_kernel>= 4.20 < 5.4.1985.4.198
linuxlinux_kernel>= 4.9 < 4.9.3184.9.318
linuxlinux_kernel>= 5.11 < 5.15.465.15.46
linuxlinux_kernel>= 5.16 < 5.17.145.17.14
linuxlinux_kernel>= 5.18 < 5.18.35.18.3
linuxlinux_kernel>= 5.5 < 5.10.1215.10.121

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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