CVE-2025-38051
- Source
- https://cve.org/CVERecord?id=CVE-2025-38051
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-38051.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2025-38051
- Downstream
- Related
- Published
- 2025-06-18T09:33:32Z
- Modified
- 2026-08-12T03:51:49Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- smb: client: Fix use-after-free in cifs_fill_dirent
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
smb: client: Fix use-after-free in cifs_fill_dirent
There is a race condition in the readdir concurrency process, which may access the rsp buffer after it has been released, triggering the following KASAN warning.
================================================================== BUG: KASAN: slab-use-after-free in cifs_fill_dirent+0xb03/0xb60 [cifs] Read of size 4 at addr ffff8880099b819c by task a.out/342975
CPU: 2 UID: 0 PID: 342975 Comm: a.out Not tainted 6.15.0-rc6+ #240 PREEMPT(full) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.1-2.fc37 04/01/2014 Call Trace: dump_stack_lvl+0x53/0x70 print_report+0xce/0x640 kasan_report+0xb8/0xf0 cifs_fill_dirent+0xb03/0xb60 [cifs] cifs_readdir+0x12cb/0x3190 [cifs] iterate_dir+0x1a1/0x520 __x64_sys_getdents+0x134/0x220 do_syscall_64+0x4b/0x110 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7f996f64b9f9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0d f7 c3 0c 00 f7 d8 64 89 8 RSP: 002b:00007f996f53de78 EFLAGS: 00000207 ORIG_RAX: 000000000000004e RAX: ffffffffffffffda RBX: 00007f996f53ecdc RCX: 00007f996f64b9f9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007f996f53dea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000207 R12: ffffffffffffff88 R13: 0000000000000000 R14: 00007ffc8cd9a500 R15: 00007f996f51e000
Allocated by task 408: kasan_save_stack+0x20/0x40 kasan_save_track+0x14/0x30 __kasan_slab_alloc+0x6e/0x70 kmem_cache_alloc_noprof+0x117/0x3d0 mempool_alloc_noprof+0xf2/0x2c0 cifs_buf_get+0x36/0x80 [cifs] allocate_buffers+0x1d2/0x330 [cifs] cifs_demultiplex_thread+0x22b/0x2690 [cifs] kthread+0x394/0x720 ret_from_fork+0x34/0x70 ret_from_fork_asm+0x1a/0x30
Freed by task 342979: kasan_save_stack+0x20/0x40 kasan_save_track+0x14/0x30 kasan_save_free_info+0x3b/0x60 __kasan_slab_free+0x37/0x50 kmem_cache_free+0x2b8/0x500 cifs_buf_release+0x3c/0x70 [cifs] cifs_readdir+0x1c97/0x3190 [cifs] iterate_dir+0x1a1/0x520 __x64_sys_getdents64+0x134/0x220 do_syscall_64+0x4b/0x110 entry_SYSCALL_64_after_hwframe+0x76/0x7e
The buggy address belongs to the object at ffff8880099b8000 which belongs to the cache cifs_request of size 16588 The buggy address is located 412 bytes inside of freed 16588-byte region [ffff8880099b8000, ffff8880099bc0cc)
The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x99b8 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0x80000000000040(head|node=0|zone=1) page_type: f5(slab) raw: 0080000000000040 ffff888001e03400 0000000000000000 dead000000000001 raw: 0000000000000000 0000000000010001 00000000f5000000 0000000000000000 head: 0080000000000040 ffff888001e03400 0000000000000000 dead000000000001 head: 0000000000000000 0000000000010001 00000000f5000000 0000000000000000 head: 0080000000000003 ffffea0000266e01 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008 page dumped because: kasan: bad access detected
Memory state around the buggy address: ffff8880099b8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880099b8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880099b8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880099b8200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880099b8280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================
POC is available in the link [1].
The problem triggering process is as follows:
Process 1 Process 2
---truncated---
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38051.json" }- References
-
- https://git.kernel.org/stable/c/1b197931fbc821bc7e9e91bf619400db563e3338
- https://git.kernel.org/stable/c/73cadde98f67f76c5eba00ac0b72c453383cec8b
- https://git.kernel.org/stable/c/9bea368648ac46f8593a780760362e40291d22a9
- https://git.kernel.org/stable/c/9c9aafbacc183598f064902365e107b5e856531f
- https://git.kernel.org/stable/c/a24c2f05ac3c5b0aaa539d9d913826d2643dfd0e
- https://git.kernel.org/stable/c/a7a8fe56e932a36f43e031b398aef92341bf5ea0
- https://git.kernel.org/stable/c/aee067e88d61eb72e966f094e4749c6b14e7008f
- https://git.kernel.org/stable/c/c8623231e0edfcccb7cc6add0288fa0f0594282f
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38051.json
- https://nvd.nist.gov/vuln/detail/CVE-2025-38051
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduceda364bc0b37f14ffd66c1f982af42990a9d77fa43Fixedaee067e88d61eb72e966f094e4749c6b14e7008fFixeda24c2f05ac3c5b0aaa539d9d913826d2643dfd0eFixed1b197931fbc821bc7e9e91bf619400db563e3338Fixedc8623231e0edfcccb7cc6add0288fa0f0594282fFixed73cadde98f67f76c5eba00ac0b72c453383cec8bFixed9bea368648ac46f8593a780760362e40291d22a9Fixed9c9aafbacc183598f064902365e107b5e856531fFixeda7a8fe56e932a36f43e031b398aef92341bf5ea0
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedLast Affected0f3da51e7046e2eb28992ba65c22d058f571356c
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced2.6.27.4Fixed2.6.28
Affected versions
v2.*
Linux / Kernel
Package
- Name
- Kernel
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced2.6.28Fixed5.4.294
- Type
- ECOSYSTEM
- Events
-
Introduced5.5.0Fixed5.10.238
- Type
- ECOSYSTEM
- Events
-
Introduced5.11.0Fixed5.15.185
- Type
- ECOSYSTEM
- Events
-
Introduced5.16.0Fixed6.1.141
- Type
- ECOSYSTEM
- Events
-
Introduced6.2.0Fixed6.6.93
- Type
- ECOSYSTEM
- Events
-
Introduced6.7.0Fixed6.12.31
- Type
- ECOSYSTEM
- Events
-
Introduced6.13.0Fixed6.14.9