{"id":"CVE-2025-68295","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix memory leak in cifs_construct_tcon()\n\nWhen having a multiuser mount with domain= specified and using\ncifscreds, cifs_set_cifscreds() will end up settin…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix memory leak in cifs_construct_tcon()\n\nWhen having a multiuser mount with domain= specified and using\ncifscreds, cifs_set_cifscreds() will end up settin…","severity":"none","published":"2025-12-16","updated":"2026-10-14","sourceUpdated":"2026-10-14T16:10:00.250","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-68295","references":[{"url":"https://git.kernel.org/stable/c/3184b6a5a24ec9ee74087b2a550476f386df7dc2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/3dd546e867e94c2f954bca45a961b6104ba708b6","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a67e91d5f446e455dd9201cdd6e865f7078d251d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d146e96fef876492979658dce644305de35878d4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f15288c137d960836277d0e3ecc62de68e52f00f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f62ffdfb431bdfa4b6d24233b7fd830eca0b801e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ff8f9bd1c46ee02d5558293915d42e82646d5ee9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd"],"epss":0.00207,"epssPercentile":0.10009,"ingestedAt":"2026-10-14T16:40:32.051Z","slug":"CVE-2025-68295","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix memory leak in cifs_construct_tcon()\n\nWhen having a multiuser mount with domain= specified and using\ncifscreds, cifs_set_cifscreds() will end up setting @ctx->domainname,\nso it needs to be freed before leaving cifs_construct_tcon().\n\nThis fixes the following memory leak reported by kmemleak:\n\n  mount.cifs //srv/share /mnt -o domain=ZELDA,multiuser,...\n  su - testuser\n  cifscreds add -d ZELDA -u testuser\n  ...\n  ls /mnt/1\n  ...\n  umount /mnt\n  echo scan > /sys/kernel/debug/kmemleak\n  cat /sys/kernel/debug/kmemleak\n  unreferenced object 0xffff8881203c3f08 (size 8):\n    comm \"ls\", pid 5060, jiffies 4307222943\n    hex dump (first 8 bytes):\n      5a 45 4c 44 41 00 cc cc                          ZELDA...\n    backtrace (crc d109a8cf):\n      __kmalloc_node_track_caller_noprof+0x572/0x710\n      kstrdup+0x3a/0x70\n      cifs_sb_tlink+0x1209/0x1770 [cifs]\n      cifs_get_fattr+0xe1/0xf50 [cifs]\n      cifs_get_inode_info+0xb5/0x240 [cifs]\n      cifs_revalidate_dentry_attr+0x2d1/0x470 [cifs]\n      cifs_getattr+0x28e/0x450 [cifs]\n      vfs_getattr_nosec+0x126/0x180\n      vfs_statx+0xf6/0x220\n      do_statx+0xab/0x110\n      __x64_sys_statx+0xd5/0x130\n      do_syscall_64+0xbb/0x380\n      entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}