CVE-2026-90175

smb: server: fix leak of ksmbd_ipc_login_request_ext() returned buffer

State: Published
Severity: Not scored
Published: Sep 17, 2026
Updated: Oct 19, 2026
Reserved: Sep 11, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

smb: server: fix leak of ksmbd_ipc_login_request_ext() returned buffer

Free it unconditionally after ksmbd_alloc_user() calls.

kmemleak splat: unreferenced object 0xffff888103b83540 (size 192): comm "pool-0", pid 16970, jiffies 4377290937 hex dump (first 32 bytes): 00 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace (crc 408ccc66): __kvmalloc_node_noprof+0x730/0x920 handle_generic_event+0xec/0x1a0 [ksmbd] genl_family_rcv_msg_doit+0xe0/0x130 genl_rcv_msg+0x181/0x290 netlink_rcv_skb+0x4f/0x100 genl_rcv+0x28/0x40 netlink_unicast+0x1e6/0x2c0 netlink_sendmsg+0x20a/0x450 ____sys_sendmsg+0x2e8/0x310 ___sys_sendmsg+0x78/0xc0 __sys_sendmsg+0x63/0xc0 do_syscall_64+0xa1/0x670 entry_SYSCALL_64_after_hwframe+0x76/0x7e

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	8a3cd890fd2a7d016a821a1c9dfd8a84d45ad320 to before 4d6fe49fa3e7fbd779c761518e6572e340233c9bAffected a77e0e02af1c2db5fc040511aa78a58a52e116ab to before c9f2872e91b9fe99c1d0ba768906f7aeb48c8517Affected a77e0e02af1c2db5fc040511aa78a58a52e116ab to before 7a98c3b903b10c4d6176948254012b5ca24b071bAffected a77e0e02af1c2db5fc040511aa78a58a52e116ab to before abb5146b2d8197d695ea9eaa0847c73e34f00985Affected a77e0e02af1c2db5fc040511aa78a58a52e116ab to before 1c3ebf832d010c08afe1359215d4121cb1ed2de5Affected 6.6.141 to before 6.6.157Affected
LinuxLinux	6.12Affected before 6.12Not affected 6.6.157 through 6.6.Not affected 6.12.110 through 6.12.Not affected 6.18.52 through 6.18.Not affected 7.2.6 through 7.2.Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

8a3cd890fd2a7d016a821a1c9dfd8a84d45ad320 to before 4d6fe49fa3e7fbd779c761518e6572e340233c9bAffected
a77e0e02af1c2db5fc040511aa78a58a52e116ab to before c9f2872e91b9fe99c1d0ba768906f7aeb48c8517Affected
a77e0e02af1c2db5fc040511aa78a58a52e116ab to before 7a98c3b903b10c4d6176948254012b5ca24b071bAffected
a77e0e02af1c2db5fc040511aa78a58a52e116ab to before abb5146b2d8197d695ea9eaa0847c73e34f00985Affected
a77e0e02af1c2db5fc040511aa78a58a52e116ab to before 1c3ebf832d010c08afe1359215d4121cb1ed2de5Affected
6.6.141 to before 6.6.157Affected

LinuxLinux

6.12Affected
before 6.12Not affected
6.6.157 through 6.6.*Not affected
6.12.110 through 6.12.*Not affected
6.18.52 through 6.18.*Not affected
7.2.6 through 7.2.*Not affected
7.3 and laterNot affected

References

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