CVE-2022-50885High· 7.5▾ TwilightIn the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Fix NULL-ptr-deref in rxe_qp_do_cleanup() when socket create failed There is a null-ptr-deref when mount.cifs over rdma: BUG: KASAN: null-ptr-deref in rxe…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.6%
In the Linux kernel, the following vulnerability has been resolved:
RDMA/rxe: Fix NULL-ptr-deref in rxe_qp_do_cleanup() when socket create failed
There is a null-ptr-deref when mount.cifs over rdma:
BUG: KASAN: null-ptr-deref in rxe_qp_do_cleanup+0x2f3/0x360 [rdma_rxe] Read of size 8 at addr 0000000000000018 by task mount.cifs/3046
CPU: 2 PID: 3046 Comm: mount.cifs Not tainted 6.1.0-rc5+ #62 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-1.fc3 Call Trace: <TASK> dump_stack_lvl+0x34/0x44 kasan_report+0xad/0x130 rxe_qp_do_cleanup+0x2f3/0x360 [rdma_rxe] execute_in_process_context+0x25/0x90 __rxe_cleanup+0x101/0x1d0 [rdma_rxe] rxe_create_qp+0x16a/0x180 [rdma_rxe] create_qp.part.0+0x27d/0x340 ib_create_qp_kernel+0x73/0x160 rdma_create_qp+0x100/0x230 _smbd_get_connection+0x752/0x20f0 smbd_get_connection+0x21/0x40 cifs_get_tcp_session+0x8ef/0xda0 mount_get_conns+0x60/0x750 cifs_mount+0x103/0xd00 cifs_smb3_do_mount+0x1dd/0xcb0 smb3_get_tree+0x1d5/0x300 vfs_get_tree+0x41/0xf0 path_mount+0x9b3/0xdd0 __x64_sys_mount+0x190/0x1d0 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x46/0xb0
The root cause of the issue is the socket create failed in rxe_qp_init_req().
So move the reset rxe_qp_do_cleanup() after the NULL ptr check.
Linux >= 8700e3e7c4857d28ebaa824509934556da0b3e76 < ee24de095569935eba600f7735e8e8ddea5b418eLinux >= 8700e3e7c4857d28ebaa824509934556da0b3e76 < 7340ca9f782be6fbe3f64a134dc112772764f766Linux >= 8700e3e7c4857d28ebaa824509934556da0b3e76 < bd7106a6004f1077a365ca7f5a99c7a708e20714Linux >= 8700e3e7c4857d28ebaa824509934556da0b3e76 < 6bb5a62bfd624039b05157745c234068508393a9Linux >= 8700e3e7c4857d28ebaa824509934556da0b3e76 < f64f08b9e6fb305a25dd75329e06ae342b9ce336Linux >= 8700e3e7c4857d28ebaa824509934556da0b3e76 < 5b924632d84a60bc0c7fe6e9bbbce99d03908957Linux >= 8700e3e7c4857d28ebaa824509934556da0b3e76 < 821f9a18210f6b9fd6792471714c799607b25db4Linux >= 8700e3e7c4857d28ebaa824509934556da0b3e76 < f67376d801499f4fa0838c18c1efcad8840e550dLinux 4.8Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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