Description
In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix memory leak in cifs_construct_tcon()
When having a multiuser mount with domain= specified and using cifscreds, cifs_set_cifscreds() will end up setting @ctx->domainname, so it needs to be freed before leaving cifs_construct_tcon().
This fixes the following memory leak reported by kmemleak:
mount.cifs //srv/share /mnt -o domain=ZELDA,multiuser,... su - testuser cifscreds add -d ZELDA -u testuser ... ls /mnt/1 ... umount /mnt echo scan > /sys/kernel/debug/kmemleak cat /sys/kernel/debug/kmemleak unreferenced object 0xffff8881203c3f08 (size 8): comm "ls", pid 5060, jiffies 4307222943 hex dump (first 8 bytes): 5a 45 4c 44 41 00 cc cc ZELDA... backtrace (crc d109a8cf): __kmalloc_node_track_caller_noprof+0x572/0x710 kstrdup+0x3a/0x70 cifs_sb_tlink+0x1209/0x1770 [cifs] cifs_get_fattr+0xe1/0xf50 [cifs] cifs_get_inode_info+0xb5/0x240 [cifs] cifs_revalidate_dentry_attr+0x2d1/0x470 [cifs] cifs_getattr+0x28e/0x450 [cifs] vfs_getattr_nosec+0x126/0x180 vfs_statx+0xf6/0x220 do_statx+0xab/0x110 __x64_sys_statx+0xd5/0x130 do_syscall_64+0xbb/0x380 entry_SYSCALL_64_after_hwframe+0x77/0x7f
Metrics
No CVSS score has been published yet.
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= f2aee329a68f5a907bcff11a109dfe17c0b41aeb, < ff8f9bd1c46ee02d5558293915d42e82646d5ee9; >= f2aee329a68f5a907bcff11a109dfe17c0b41aeb, < d146e96fef876492979658dce644305de35878d4; >= f2aee329a68f5a907bcff11a109dfe17c0b41aeb, < 3dd546e867e94c2f954bca45a961b6104ba708b6; >= f2aee329a68f5a907bcff11a109dfe17c0b41aeb, < f62ffdfb431bdfa4b6d24233b7fd830eca0b801e; >= f2aee329a68f5a907bcff11a109dfe17c0b41aeb, < f15288c137d960836277d0e3ecc62de68e52f00f; >= f2aee329a68f5a907bcff11a109dfe17c0b41aeb, < a67e91d5f446e455dd9201cdd6e865f7078d251d; >= f2aee329a68f5a907bcff11a109dfe17c0b41aeb, < 3184b6a5a24ec9ee74087b2a550476f386df7dc2; 1456d3cea31114137fabf1110d20a2e2c6d6060f; 16764d7486d02b1699ae16e91d7a577602398b17; 904847402bd74a28164bd4d8da082d1eace7c190; 325fa2a6729b74b2806b31725940cb54658515e5; 8db988a982908b7bff76e095000adabf9c29698b; >= 4.4.194, < 4.5; >= 4.9.194, < 4.10; >= 4.14.146, < 4.15; >= 4.19.75, < 4.20; >= 5.2.17, < 5.3 |
| Linux | Linux | 5.3 |
References
- https://git.kernel.org/stable/c/3184b6a5a24ec9ee74087b2a550476f386df7dc2
- https://git.kernel.org/stable/c/3dd546e867e94c2f954bca45a961b6104ba708b6
- https://git.kernel.org/stable/c/a67e91d5f446e455dd9201cdd6e865f7078d251d
- https://git.kernel.org/stable/c/d146e96fef876492979658dce644305de35878d4
- https://git.kernel.org/stable/c/f15288c137d960836277d0e3ecc62de68e52f00f
- https://git.kernel.org/stable/c/f62ffdfb431bdfa4b6d24233b7fd830eca0b801e
- https://git.kernel.org/stable/c/ff8f9bd1c46ee02d5558293915d42e82646d5ee9
Timeline
- Published
- Dec 16, 2025
- Last modified
- Oct 14, 2026
- NVD status
- Deferred