{"id":"CVE-2024-53177","title":"smb: prevent use-after-free due to open_cached_dir error paths","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: prevent use-after-free due to open_cached_dir error paths\n\nIf open_cached_dir() encounters an error parsing the lease from the\nserver, the error handling may race …","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= 93877b9afc2994c89362007aac480a7b150f386f < 791f833053578b9fd24252ebb7162a61bc3f805b","Linux >= 5c86919455c1edec99ebd3338ad213b59271a71b < 97e2afcac0bebfef6a5360f4267ce4c44507b845","Linux >= 5c86919455c1edec99ebd3338ad213b59271a71b < 47655a12c6b1bca8fa230085eab2e85a076932b7","Linux >= 5c86919455c1edec99ebd3338ad213b59271a71b < a9685b409a03b73d2980bbfa53eb47555802d0a9","Linux 06c106e1e8568e840c946cc0222579e3d29dab8e","Linux 6db94d08359c43f2c8fe372811cdee04564a41b9","Linux >= 6.6.3 < 6.6.64","Linux >= 6.1.191 < 6.2","Linux >= 6.5.13 < 6.6","Linux 6.7"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2025-02-11T15:43:30.968681Z"},"published":"2024-12-27","updated":"2026-10-30","sourceUpdated":"2026-10-30T12:20:07.565Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2024-53177","references":[{"url":"https://git.kernel.org/stable/c/791f833053578b9fd24252ebb7162a61bc3f805b"},{"url":"https://git.kernel.org/stable/c/97e2afcac0bebfef6a5360f4267ce4c44507b845"},{"url":"https://git.kernel.org/stable/c/47655a12c6b1bca8fa230085eab2e85a076932b7"},{"url":"https://git.kernel.org/stable/c/a9685b409a03b73d2980bbfa53eb47555802d0a9"}],"tags":["cve.org"],"epss":0.00554,"epssPercentile":0.46501,"ingestedAt":"2026-11-03T14:47:02.519Z","slug":"CVE-2024-53177","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nsmb: prevent use-after-free due to open_cached_dir error paths\n\nIf open_cached_dir() encounters an error parsing the lease from the\nserver, the error handling may race with receiving a lease break,\nresulting in open_cached_dir() freeing the cfid while the queued work is\npending.\n\nUpdate open_cached_dir() to drop refs rather than directly freeing the\ncfid.\n\nHave cached_dir_lease_break(), cfids_laundromat_worker(), and\ninvalidate_all_cached_dirs() clear has_lease immediately while still\nholding cfids->cfid_list_lock, and then use this to also simplify the\nreference counting in cfids_laundromat_worker() and\ninvalidate_all_cached_dirs().\n\nFixes this KASAN splat (which manually injects an error and lease break\nin open_cached_dir()):\n\n==================================================================\nBUG: KASAN: slab-use-after-free in smb2_cached_lease_break+0x27/0xb0\nRead of size 8 at addr ffff88811cc24c10 by task kworker/3:1/65\n\nCPU: 3 UID: 0 PID: 65 Comm: kworker/3:1 Not tainted 6.12.0-rc6-g255cf264e6e5-dirty #87\nHardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 11/12/2020\nWorkqueue: cifsiod smb2_cached_lease_break\nCall Trace:\n <TASK>\n dump_stack_lvl+0x77/0xb0\n print_report+0xce/0x660\n kasan_report+0xd3/0x110\n smb2_cached_lease_break+0x27/0xb0\n process_one_work+0x50a/0xc50\n worker_thread+0x2ba/0x530\n kthread+0x17c/0x1c0\n ret_from_fork+0x34/0x60\n ret_from_fork_asm+0x1a/0x30\n </TASK>\n\nAllocated by task 2464:\n kasan_save_stack+0x33/0x60\n kasan_save_track+0x14/0x30\n __kasan_kmalloc+0xaa/0xb0\n open_cached_dir+0xa7d/0x1fb0\n smb2_query_path_info+0x43c/0x6e0\n cifs_get_fattr+0x346/0xf10\n cifs_get_inode_info+0x157/0x210\n cifs_revalidate_dentry_attr+0x2d1/0x460\n cifs_getattr+0x173/0x470\n vfs_statx_path+0x10f/0x160\n vfs_statx+0xe9/0x150\n vfs_fstatat+0x5e/0xc0\n __do_sys_newfstatat+0x91/0xf0\n do_syscall_64+0x95/0x1a0\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nFreed by task 2464:\n kasan_save_stack+0x33/0x60\n kasan_save_track+0x14/0x30\n kasan_save_free_info+0x3b/0x60\n __kasan_slab_free+0x51/0x70\n kfree+0x174/0x520\n open_cached_dir+0x97f/0x1fb0\n smb2_query_path_info+0x43c/0x6e0\n cifs_get_fattr+0x346/0xf10\n cifs_get_inode_info+0x157/0x210\n cifs_revalidate_dentry_attr+0x2d1/0x460\n cifs_getattr+0x173/0x470\n vfs_statx_path+0x10f/0x160\n vfs_statx+0xe9/0x150\n vfs_fstatat+0x5e/0xc0\n __do_sys_newfstatat+0x91/0xf0\n do_syscall_64+0x95/0x1a0\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nLast potentially related work creation:\n kasan_save_stack+0x33/0x60\n __kasan_record_aux_stack+0xad/0xc0\n insert_work+0x32/0x100\n __queue_work+0x5c9/0x870\n queue_work_on+0x82/0x90\n open_cached_dir+0x1369/0x1fb0\n smb2_query_path_info+0x43c/0x6e0\n cifs_get_fattr+0x346/0xf10\n cifs_get_inode_info+0x157/0x210\n cifs_revalidate_dentry_attr+0x2d1/0x460\n cifs_getattr+0x173/0x470\n vfs_statx_path+0x10f/0x160\n vfs_statx+0xe9/0x150\n vfs_fstatat+0x5e/0xc0\n __do_sys_newfstatat+0x91/0xf0\n do_syscall_64+0x95/0x1a0\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nThe buggy address belongs to the object at ffff88811cc24c00\n which belongs to the cache kmalloc-1k of size 1024\nThe buggy address is located 16 bytes inside of\n freed 1024-byte region [ffff88811cc24c00, ffff88811cc25000)\n\n## Affected\n\n- `Linux >= 93877b9afc2994c89362007aac480a7b150f386f < 791f833053578b9fd24252ebb7162a61bc3f805b`\n- `Linux >= 5c86919455c1edec99ebd3338ad213b59271a71b < 97e2afcac0bebfef6a5360f4267ce4c44507b845`\n- `Linux >= 5c86919455c1edec99ebd3338ad213b59271a71b < 47655a12c6b1bca8fa230085eab2e85a076932b7`\n- `Linux >= 5c86919455c1edec99ebd3338ad213b59271a71b < a9685b409a03b73d2980bbfa53eb47555802d0a9`\n- `Linux 06c106e1e8568e840c946cc0222579e3d29dab8e`\n- `Linux 6db94d08359c43f2c8fe372811cdee04564a41b9`\n- `Linux >= 6.6.3 < 6.6.64`\n- `Linux >= 6.1.191 < 6.2`\n- `Linux >= 6.5.13 < 6.6`\n- `Linux 6.7`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}