cbcvebase.
CVE-2023-53525
published 2025-10-01

CVE-2023-53525: In the Linux kernel, the following vulnerability has been resolved: RDMA/cma: Allow UD qp_type to join multicast only As for multicast: - The SIDR is the only…

PriorityP420medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.14%
3.4th percentile
In the Linux kernel, the following vulnerability has been resolved: RDMA/cma: Allow UD qp_type to join multicast only As for multicast: - The SIDR is the only mode that makes sense; - Besides PS_UDP, other port spaces like PS_IB is also allowed, as it is UD compatible. In this case qkey also needs to be set [1]. This patch allows only UD qp_type to join multicast, and set qkey to default if it's not set, to fix an uninit-value error: the ib->rec.qkey field is accessed without being initialized. BUG: KMSAN: uninit-value in cma_set_qkey drivers/infiniband/core/cma.c:510 [inline] BUG: KMSAN: uninit-value in cma_make_mc_event+0xb73/0xe00 drivers/infiniband/core/cma.c:4570 cma_set_qkey drivers/infiniband/core/cma.c:510 [inline] cma_make_mc_event+0xb73/0xe00 drivers/infiniband/core/cma.c:4570 cma_iboe_join_multicast drivers/infiniband/core/cma.c:4782 [inline] rdma_join_multicast+0x2b83/0x30a0 drivers/infiniband/core/cma.c:4814 ucma_process_join+0xa76/0xf60 drivers/infiniband/core/ucma.c:1479 ucma_join_multicast+0x1e3/0x250 drivers/infiniband/core/ucma.c:1546 ucma_write+0x639/0x6d0 drivers/infiniband/core/ucma.c:1732 vfs_write+0x8ce/0x2030 fs/read_write.c:588 ksys_write+0x28c/0x520 fs/read_write.c:643 __do_sys_write fs/read_write.c:655 [inline] __se_sys_write fs/read_write.c:652 [inline] __ia32_sys_write+0xdb/0x120 fs/read_write.c:652 do_syscall_32_irqs_on arch/x86/entry/common.c:114 [inline] __do_fast_syscall_32+0x96/0xf0 arch/x86/entry/common.c:180 do_fast_syscall_32+0x34/0x70 arch/x86/entry/common.c:205 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:248 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c Local variable ib.i created at: cma_iboe_join_multicast drivers/infiniband/core/cma.c:4737 [inline] rdma_join_multicast+0x586/0x30a0 drivers/infiniband/core/cma.c:4814 ucma_process_join+0xa76/0xf60 drivers/infiniband/core/ucma.c:1479 CPU: 0 PID: 29874 Comm: syz-executor.3 Not tainted 5.16.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute En

Affected

21 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.25-1 (bookworm)linux 6.1.25-1 (bookworm)
linuxlinux——
linuxlinux——
linuxlinux——
linuxlinux>= 5.8.17 < 5.95.9
linuxlinux>= 5.9.2 < 5.105.10
linuxlinux>= b5de0c60cc30c2a3513c7188c73f3f29acc29234 < ae11498851423d6de27aebfe12a5ee85060ab1d5ae11498851423d6de27aebfe12a5ee85060ab1d5
linuxlinux>= b5de0c60cc30c2a3513c7188c73f3f29acc29234 < 48e8e7851dc0b1584d83817a78fc7108c8904b5448e8e7851dc0b1584d83817a78fc7108c8904b54
linuxlinux>= b5de0c60cc30c2a3513c7188c73f3f29acc29234 < 02eabb635bc64bd1e3a7cf887d6d182bffb64b9902eabb635bc64bd1e3a7cf887d6d182bffb64b99
linuxlinux>= b5de0c60cc30c2a3513c7188c73f3f29acc29234 < bb18b9dbac2bbdf7695e0bfaac4bf944ff7b207dbb18b9dbac2bbdf7695e0bfaac4bf944ff7b207d
linuxlinux>= b5de0c60cc30c2a3513c7188c73f3f29acc29234 < 58e84f6b3e84e46524b7e5a916b53c1ad798bc8f58e84f6b3e84e46524b7e5a916b53c1ad798bc8f
linuxlinux_kernel——
linuxlinux_kernel>= 0 < 5.10.178-15.10.178-1
linuxlinux_kernel>= 0 < 6.1.25-16.1.25-1
linuxlinux_kernel>= 0 < 6.1.25-16.1.25-1
linuxlinux_kernel>= 0 < 6.1.25-16.1.25-1
linuxlinux_kernel>= 5.11 < 5.15.1085.15.108
linuxlinux_kernel>= 5.16 < 6.1.256.1.25
linuxlinux_kernel>= 5.8.17 < 5.95.9
linuxlinux_kernel>= 5.9.2 < 5.10.1785.10.178
linuxlinux_kernel>= 6.2 < 6.2.126.2.12

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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