CVE-2022-48925: In the Linux kernel, the following vulnerability has been resolved: RDMA/cma: Do not change route.addr.src_addr outside state checks If the state is not idle…

PriorityP339high7.8CVSS 3.1

AVLACLPRLUINSUCHIHAH

EPSS

0.22%

12.8th percentile

In the Linux kernel, the following vulnerability has been resolved: RDMA/cma: Do not change route.addr.src_addr outside state checks If the state is not idle then resolve_prepare_src() should immediately fail and no change to global state should happen. However, it unconditionally overwrites the src_addr trying to build a temporary any address. For instance if the state is already RDMA_CM_LISTEN then this will corrupt the src_addr and would cause the test in cma_cancel_operation(): if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev) Which would manifest as this trace from syzkaller: BUG: KASAN: use-after-free in __list_add_valid+0x93/0xa0 lib/list_debug.c:26 Read of size 8 at addr ffff8881546491e0 by task syz-executor.1/32204 CPU: 1 PID: 32204 Comm: syz-executor.1 Not tainted 5.12.0-rc8-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x141/0x1d7 lib/dump_stack.c:120 print_address_description.constprop.0.cold+0x5b/0x2f8 mm/kasan/report.c:232 __kasan_report mm/kasan/report.c:399 [inline] kasan_report.cold+0x7c/0xd8 mm/kasan/report.c:416 __list_add_valid+0x93/0xa0 lib/list_debug.c:26 __list_add include/linux/list.h:67 [inline] list_add_tail include/linux/list.h:100 [inline] cma_listen_on_all drivers/infiniband/core/cma.c:2557 [inline] rdma_listen+0x787/0xe00 drivers/infiniband/core/cma.c:3751 ucma_listen+0x16a/0x210 drivers/infiniband/core/ucma.c:1102 ucma_write+0x259/0x350 drivers/infiniband/core/ucma.c:1732 vfs_write+0x28e/0xa30 fs/read_write.c:603 ksys_write+0x1ee/0x250 fs/read_write.c:658 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae This is indicating that an rdma_id_private was destroyed without doing cma_cancel_listens(). Instead of trying to re-use the src_addr memory to indirectly create an any address derived from the dst build one explicitly on the stack and bind to that as an

Affected

13 ranges

Vendor	Product	Version range	Fixed in
debian	linux	< linux 5.16.12-1 (bookworm)	linux 5.16.12-1 (bookworm)
linux	linux	—	—
linux	linux	>= 732d41c545bb359cbb8c94698bdc1f8bcf82279c < 5b1cef5798b4fd6e4fd5522e7b8a26248beeacaa	5b1cef5798b4fd6e4fd5522e7b8a26248beeacaa
linux	linux	>= 732d41c545bb359cbb8c94698bdc1f8bcf82279c < 00265efbd3e5705038c9492a434fda8cf960c8a2	00265efbd3e5705038c9492a434fda8cf960c8a2
linux	linux	>= 732d41c545bb359cbb8c94698bdc1f8bcf82279c < d350724795c7a48b05bf921d94699fbfecf7da0b	d350724795c7a48b05bf921d94699fbfecf7da0b
linux	linux	>= 732d41c545bb359cbb8c94698bdc1f8bcf82279c < 22e9f71072fa605cbf033158db58e0790101928d	22e9f71072fa605cbf033158db58e0790101928d
linux	linux_kernel	>= 0 < 5.10.103-1	5.10.103-1
linux	linux_kernel	>= 0 < 5.16.12-1	5.16.12-1
linux	linux_kernel	>= 0 < 5.16.12-1	5.16.12-1
linux	linux_kernel	>= 0 < 5.16.12-1	5.16.12-1
linux	linux_kernel	>= 5.10 < 5.10.103	5.10.103
linux	linux_kernel	>= 5.11 < 5.15.26	5.15.26
linux	linux_kernel	>= 5.16 < 5.16.12	5.16.12

CVSS provenance

nvdv3.17.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

osv7.8HIGH

vendor_debian7.8HIGH

vendor_redhat7.8HIGH

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