CVE-2022-50885

RDMA/rxe: Fix NULL-ptr-deref in rxe_qp_do_cleanup() when socket create failed

State: Published
Severity: 7.5 High
Published: Dec 30, 2025
Updated: Oct 15, 2026
Reserved: Dec 30, 2025

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	8700e3e7c4857d28ebaa824509934556da0b3e76 to before ee24de095569935eba600f7735e8e8ddea5b418eAffected 8700e3e7c4857d28ebaa824509934556da0b3e76 to before 7340ca9f782be6fbe3f64a134dc112772764f766Affected 8700e3e7c4857d28ebaa824509934556da0b3e76 to before bd7106a6004f1077a365ca7f5a99c7a708e20714Affected 8700e3e7c4857d28ebaa824509934556da0b3e76 to before 6bb5a62bfd624039b05157745c234068508393a9Affected 8700e3e7c4857d28ebaa824509934556da0b3e76 to before f64f08b9e6fb305a25dd75329e06ae342b9ce336Affected 8700e3e7c4857d28ebaa824509934556da0b3e76 to before 5b924632d84a60bc0c7fe6e9bbbce99d03908957Affected 8700e3e7c4857d28ebaa824509934556da0b3e76 to before 821f9a18210f6b9fd6792471714c799607b25db4Affected 8700e3e7c4857d28ebaa824509934556da0b3e76 to before f67376d801499f4fa0838c18c1efcad8840e550dAffected
LinuxLinux	4.8Affected before 4.8Not affected 4.14.303 through 4.14.Not affected 4.19.270 through 4.19.Not affected 5.4.229 through 5.4.Not affected 5.10.163 through 5.10.Not affected 5.15.86 through 5.15.Not affected 6.0.16 through 6.0.Not affected 6.1.2 through 6.1.*Not affected 6.2 and laterNot affected

Product

Versions

LinuxLinux

8700e3e7c4857d28ebaa824509934556da0b3e76 to before ee24de095569935eba600f7735e8e8ddea5b418eAffected
8700e3e7c4857d28ebaa824509934556da0b3e76 to before 7340ca9f782be6fbe3f64a134dc112772764f766Affected
8700e3e7c4857d28ebaa824509934556da0b3e76 to before bd7106a6004f1077a365ca7f5a99c7a708e20714Affected
8700e3e7c4857d28ebaa824509934556da0b3e76 to before 6bb5a62bfd624039b05157745c234068508393a9Affected
8700e3e7c4857d28ebaa824509934556da0b3e76 to before f64f08b9e6fb305a25dd75329e06ae342b9ce336Affected
8700e3e7c4857d28ebaa824509934556da0b3e76 to before 5b924632d84a60bc0c7fe6e9bbbce99d03908957Affected
8700e3e7c4857d28ebaa824509934556da0b3e76 to before 821f9a18210f6b9fd6792471714c799607b25db4Affected
8700e3e7c4857d28ebaa824509934556da0b3e76 to before f67376d801499f4fa0838c18c1efcad8840e550dAffected

LinuxLinux

4.8Affected
before 4.8Not affected
4.14.303 through 4.14.*Not affected
4.19.270 through 4.19.*Not affected
5.4.229 through 5.4.*Not affected
5.10.163 through 5.10.*Not affected
5.15.86 through 5.15.*Not affected
6.0.16 through 6.0.*Not affected
6.1.2 through 6.1.*Not affected
6.2 and laterNot affected

References

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