{"id":"CVE-2025-68295","state":"PUBLISHED","title":"smb: client: fix memory leak in cifs_construct_tcon()","description":"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 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","publishedAt":"2025-12-16T15:06:14.977Z","updatedAt":"2026-06-16T16:54:20.236Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f2aee329a68f5a907bcff11a109dfe17c0b41aeb","status":"affected","lessThan":"ff8f9bd1c46ee02d5558293915d42e82646d5ee9","versionType":"git"},{"version":"f2aee329a68f5a907bcff11a109dfe17c0b41aeb","status":"affected","lessThan":"d146e96fef876492979658dce644305de35878d4","versionType":"git"},{"version":"f2aee329a68f5a907bcff11a109dfe17c0b41aeb","status":"affected","lessThan":"3dd546e867e94c2f954bca45a961b6104ba708b6","versionType":"git"},{"version":"f2aee329a68f5a907bcff11a109dfe17c0b41aeb","status":"affected","lessThan":"f62ffdfb431bdfa4b6d24233b7fd830eca0b801e","versionType":"git"},{"version":"f2aee329a68f5a907bcff11a109dfe17c0b41aeb","status":"affected","lessThan":"f15288c137d960836277d0e3ecc62de68e52f00f","versionType":"git"},{"version":"f2aee329a68f5a907bcff11a109dfe17c0b41aeb","status":"affected","lessThan":"a67e91d5f446e455dd9201cdd6e865f7078d251d","versionType":"git"},{"version":"f2aee329a68f5a907bcff11a109dfe17c0b41aeb","status":"affected","lessThan":"3184b6a5a24ec9ee74087b2a550476f386df7dc2","versionType":"git"},{"version":"1456d3cea31114137fabf1110d20a2e2c6d6060f","status":"affected","versionType":"git"},{"version":"16764d7486d02b1699ae16e91d7a577602398b17","status":"affected","versionType":"git"},{"version":"904847402bd74a28164bd4d8da082d1eace7c190","status":"affected","versionType":"git"},{"version":"325fa2a6729b74b2806b31725940cb54658515e5","status":"affected","versionType":"git"},{"version":"8db988a982908b7bff76e095000adabf9c29698b","status":"affected","versionType":"git"},{"version":"4.4.194","status":"affected","lessThan":"4.5","versionType":"semver"},{"version":"4.9.194","status":"affected","lessThan":"4.10","versionType":"semver"},{"version":"4.14.146","status":"affected","lessThan":"4.15","versionType":"semver"},{"version":"4.19.75","status":"affected","lessThan":"4.20","versionType":"semver"},{"version":"5.2.17","status":"affected","lessThan":"5.3","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/smb/client/connect.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.3","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.3","versionType":"semver"},{"version":"5.10.247","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.197","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.159","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.119","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.61","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.17.11","status":"unaffected","lessThanOrEqual":"6.17.*","versionType":"semver"},{"version":"6.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/smb/client/connect.c"]}],"references":["https://git.kernel.org/stable/c/ff8f9bd1c46ee02d5558293915d42e82646d5ee9","https://git.kernel.org/stable/c/d146e96fef876492979658dce644305de35878d4","https://git.kernel.org/stable/c/3dd546e867e94c2f954bca45a961b6104ba708b6","https://git.kernel.org/stable/c/f62ffdfb431bdfa4b6d24233b7fd830eca0b801e","https://git.kernel.org/stable/c/f15288c137d960836277d0e3ecc62de68e52f00f","https://git.kernel.org/stable/c/a67e91d5f446e455dd9201cdd6e865f7078d251d","https://git.kernel.org/stable/c/3184b6a5a24ec9ee74087b2a550476f386df7dc2"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:56.034Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/68xxx/CVE-2025-68295.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-68295","state":"PUBLISHED","datePublished":"2025-12-16T15:06:14.977Z","dateUpdated":"2026-06-16T16:54:20.236Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-12-16T14:48:05.293Z"},"containers":{"cna":{"title":"smb: client: fix memory leak in cifs_construct_tcon()","descriptions":[{"lang":"en","value":"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 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"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f2aee329a68f5a907bcff11a109dfe17c0b41aeb","status":"affected","lessThan":"ff8f9bd1c46ee02d5558293915d42e82646d5ee9","versionType":"git"},{"version":"f2aee329a68f5a907bcff11a109dfe17c0b41aeb","status":"affected","lessThan":"d146e96fef876492979658dce644305de35878d4","versionType":"git"},{"version":"f2aee329a68f5a907bcff11a109dfe17c0b41aeb","status":"affected","lessThan":"3dd546e867e94c2f954bca45a961b6104ba708b6","versionType":"git"},{"version":"f2aee329a68f5a907bcff11a109dfe17c0b41aeb","status":"affected","lessThan":"f62ffdfb431bdfa4b6d24233b7fd830eca0b801e","versionType":"git"},{"version":"f2aee329a68f5a907bcff11a109dfe17c0b41aeb","status":"affected","lessThan":"f15288c137d960836277d0e3ecc62de68e52f00f","versionType":"git"},{"version":"f2aee329a68f5a907bcff11a109dfe17c0b41aeb","status":"affected","lessThan":"a67e91d5f446e455dd9201cdd6e865f7078d251d","versionType":"git"},{"version":"f2aee329a68f5a907bcff11a109dfe17c0b41aeb","status":"affected","lessThan":"3184b6a5a24ec9ee74087b2a550476f386df7dc2","versionType":"git"},{"version":"1456d3cea31114137fabf1110d20a2e2c6d6060f","status":"affected","versionType":"git"},{"version":"16764d7486d02b1699ae16e91d7a577602398b17","status":"affected","versionType":"git"},{"version":"904847402bd74a28164bd4d8da082d1eace7c190","status":"affected","versionType":"git"},{"version":"325fa2a6729b74b2806b31725940cb54658515e5","status":"affected","versionType":"git"},{"version":"8db988a982908b7bff76e095000adabf9c29698b","status":"affected","versionType":"git"},{"version":"4.4.194","status":"affected","lessThan":"4.5","versionType":"semver"},{"version":"4.9.194","status":"affected","lessThan":"4.10","versionType":"semver"},{"version":"4.14.146","status":"affected","lessThan":"4.15","versionType":"semver"},{"version":"4.19.75","status":"affected","lessThan":"4.20","versionType":"semver"},{"version":"5.2.17","status":"affected","lessThan":"5.3","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/smb/client/connect.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.3","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.3","versionType":"semver"},{"version":"5.10.247","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.197","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.159","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.119","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.61","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.17.11","status":"unaffected","lessThanOrEqual":"6.17.*","versionType":"semver"},{"version":"6.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/smb/client/connect.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/ff8f9bd1c46ee02d5558293915d42e82646d5ee9"},{"url":"https://git.kernel.org/stable/c/d146e96fef876492979658dce644305de35878d4"},{"url":"https://git.kernel.org/stable/c/3dd546e867e94c2f954bca45a961b6104ba708b6"},{"url":"https://git.kernel.org/stable/c/f62ffdfb431bdfa4b6d24233b7fd830eca0b801e"},{"url":"https://git.kernel.org/stable/c/f15288c137d960836277d0e3ecc62de68e52f00f"},{"url":"https://git.kernel.org/stable/c/a67e91d5f446e455dd9201cdd6e865f7078d251d"},{"url":"https://git.kernel.org/stable/c/3184b6a5a24ec9ee74087b2a550476f386df7dc2"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-23T16:02:33.913Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.3","versionEndExcluding":"5.10.247"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.3","versionEndExcluding":"5.15.197"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.3","versionEndExcluding":"6.1.159"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.3","versionEndExcluding":"6.6.119"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.3","versionEndExcluding":"6.12.61"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.3","versionEndExcluding":"6.17.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.3","versionEndExcluding":"6.18"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4.194"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.9.194"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14.146"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19.75"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.2.17"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-16T16:54:11.171368Z","id":"CVE-2025-68295","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-16T16:54:20.236Z"}}]}}}