NVD Vulnerability Detail

CVE-2022-48919

Summary	In the Linux kernel, the following vulnerability has been resolved: cifs: fix double free race when mount fails in cifs_get_root() When cifs_get_root() fails during cifs_smb3_do_mount() we call deactivate_locked_super() which eventually will call delayed_free() which will free the context. In this situation we should not proceed to enter the out: section in cifs_smb3_do_mount() and free the same resources a second time. [Thu Feb 10 12:59:06 2022] BUG: KASAN: use-after-free in rcu_cblist_dequeue+0x32/0x60 [Thu Feb 10 12:59:06 2022] Read of size 8 at addr ffff888364f4d110 by task swapper/1/0 [Thu Feb 10 12:59:06 2022] CPU: 1 PID: 0 Comm: swapper/1 Tainted: G OE 5.17.0-rc3+ #4 [Thu Feb 10 12:59:06 2022] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.0 12/17/2019 [Thu Feb 10 12:59:06 2022] Call Trace: [Thu Feb 10 12:59:06 2022] <IRQ> [Thu Feb 10 12:59:06 2022] dump_stack_lvl+0x5d/0x78 [Thu Feb 10 12:59:06 2022] print_address_description.constprop.0+0x24/0x150 [Thu Feb 10 12:59:06 2022] ? rcu_cblist_dequeue+0x32/0x60 [Thu Feb 10 12:59:06 2022] kasan_report.cold+0x7d/0x117 [Thu Feb 10 12:59:06 2022] ? rcu_cblist_dequeue+0x32/0x60 [Thu Feb 10 12:59:06 2022] __asan_load8+0x86/0xa0 [Thu Feb 10 12:59:06 2022] rcu_cblist_dequeue+0x32/0x60 [Thu Feb 10 12:59:06 2022] rcu_core+0x547/0xca0 [Thu Feb 10 12:59:06 2022] ? call_rcu+0x3c0/0x3c0 [Thu Feb 10 12:59:06 2022] ? __this_cpu_preempt_check+0x13/0x20 [Thu Feb 10 12:59:06 2022] ? lock_is_held_type+0xea/0x140 [Thu Feb 10 12:59:06 2022] rcu_core_si+0xe/0x10 [Thu Feb 10 12:59:06 2022] __do_softirq+0x1d4/0x67b [Thu Feb 10 12:59:06 2022] __irq_exit_rcu+0x100/0x150 [Thu Feb 10 12:59:06 2022] irq_exit_rcu+0xe/0x30 [Thu Feb 10 12:59:06 2022] sysvec_hyperv_stimer0+0x9d/0xc0 ... [Thu Feb 10 12:59:07 2022] Freed by task 58179: [Thu Feb 10 12:59:07 2022] kasan_save_stack+0x26/0x50 [Thu Feb 10 12:59:07 2022] kasan_set_track+0x25/0x30 [Thu Feb 10 12:59:07 2022] kasan_set_free_info+0x24/0x40 [Thu Feb 10 12:59:07 2022] ____kasan_slab_free+0x137/0x170 [Thu Feb 10 12:59:07 2022] __kasan_slab_free+0x12/0x20 [Thu Feb 10 12:59:07 2022] slab_free_freelist_hook+0xb3/0x1d0 [Thu Feb 10 12:59:07 2022] kfree+0xcd/0x520 [Thu Feb 10 12:59:07 2022] cifs_smb3_do_mount+0x149/0xbe0 [cifs] [Thu Feb 10 12:59:07 2022] smb3_get_tree+0x1a0/0x2e0 [cifs] [Thu Feb 10 12:59:07 2022] vfs_get_tree+0x52/0x140 [Thu Feb 10 12:59:07 2022] path_mount+0x635/0x10c0 [Thu Feb 10 12:59:07 2022] __x64_sys_mount+0x1bf/0x210 [Thu Feb 10 12:59:07 2022] do_syscall_64+0x5c/0xc0 [Thu Feb 10 12:59:07 2022] entry_SYSCALL_64_after_hwframe+0x44/0xae [Thu Feb 10 12:59:07 2022] Last potentially related work creation: [Thu Feb 10 12:59:07 2022] kasan_save_stack+0x26/0x50 [Thu Feb 10 12:59:07 2022] __kasan_record_aux_stack+0xb6/0xc0 [Thu Feb 10 12:59:07 2022] kasan_record_aux_stack_noalloc+0xb/0x10 [Thu Feb 10 12:59:07 2022] call_rcu+0x76/0x3c0 [Thu Feb 10 12:59:07 2022] cifs_umount+0xce/0xe0 [cifs] [Thu Feb 10 12:59:07 2022] cifs_kill_sb+0xc8/0xe0 [cifs] [Thu Feb 10 12:59:07 2022] deactivate_locked_super+0x5d/0xd0 [Thu Feb 10 12:59:07 2022] cifs_smb3_do_mount+0xab9/0xbe0 [cifs] [Thu Feb 10 12:59:07 2022] smb3_get_tree+0x1a0/0x2e0 [cifs] [Thu Feb 10 12:59:07 2022] vfs_get_tree+0x52/0x140 [Thu Feb 10 12:59:07 2022] path_mount+0x635/0x10c0 [Thu Feb 10 12:59:07 2022] __x64_sys_mount+0x1bf/0x210 [Thu Feb 10 12:59:07 2022] do_syscall_64+0x5c/0xc0 [Thu Feb 10 12:59:07 2022] entry_SYSCALL_64_after_hwframe+0x44/0xae
Publication Date	Aug. 22, 2024, 11:15 a.m.
Registration Date	Aug. 26, 2024, 4:57 p.m.
Last Update	Aug. 28, 2024, 1:07 a.m.

CVSS3.1 : HIGH
スコア	7.8
Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
攻撃元区分(AV)	ローカル
攻撃条件の複雑さ(AC)	低
攻撃に必要な特権レベル(PR)	低
利用者の関与(UI)	不要
影響の想定範囲(S)	変更なし
機密性への影響(C)	高
完全性への影響(I)	高
可用性への影響(A)	高

Affected software configurations

Configuration1	or higher	or less	more than	less than
cpe:2.3:o:linux:linux_kernel::::::::	5.16			5.16.13
cpe:2.3:o:linux:linux_kernel::::::::	5.11			5.15.27
cpe:2.3:o:linux:linux_kernel::::::::	5.5			5.10.104
cpe:2.3:o:linux:linux_kernel::::::::	4.20			5.4.183
cpe:2.3:o:linux:linux_kernel::::::::	4.15			4.19.233
cpe:2.3:o:linux:linux_kernel::::::::	4.10			4.14.270
cpe:2.3:o:linux:linux_kernel::::::::				4.9.305

Related information, measures and tools

No	URL	タグ
1	https://git.kernel.org/stable/c/da834d6c1147c7519a9e55b510a03b7055104749	Patch
2	https://git.kernel.org/stable/c/147a0e71ccf96df9fc8c2ac500829d8e423ef02c	Patch
3	https://git.kernel.org/stable/c/2fe0e281f7ad0a62259649764228227dd6b2561d	Patch
4	https://git.kernel.org/stable/c/e208668ef7ba23efcbf76a8200cab8deee501c4d	Patch
5	https://git.kernel.org/stable/c/df9db1a2af37f39ad1653c7b9b0d275d72d0bc67	Patch
6	https://git.kernel.org/stable/c/546d60859ecf13380fcabcbeace53a5971493a2b	Patch
7	https://git.kernel.org/stable/c/563431c1f3c8f2230e4a9c445fa23758742bc4f0	Patch
8	https://git.kernel.org/stable/c/3d6cc9898efdfb062efb74dc18cfc700e082f5d5	Patch

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-415	二重解放	https://cwe.mitre.org/data/definitions/415.html

JVN Vulnerability Information

Linux の Linux Kernel における二重解放に関する脆弱性

Title	Linux の Linux Kernel における二重解放に関する脆弱性
Summary	Linux の Linux Kernel には、二重解放に関する脆弱性が存在します。
Possible impacts	情報を取得される、情報を改ざんされる、およびサービス運用妨害 (DoS) 状態にされる可能性があります。
Solution	ベンダより正式な対策が公開されています。ベンダ情報を参照して適切な対策を実施してください。
Publication Date	Feb. 13, 2022, midnight
Registration Date	Aug. 29, 2024, 12:55 p.m.
Last Update	Dec. 15, 2025, 2:48 p.m.

Affected System

Linux

Linux Kernel 4.10 以上 4.14.270 未満

Linux Kernel 4.15 以上 4.19.233 未満

Linux Kernel 4.20 以上 5.4.183 未満

Linux Kernel 4.9.305 未満

Linux Kernel 5.11 以上 5.15.27 未満

Linux Kernel 5.16 以上 5.16.13 未満

Linux Kernel 5.5 以上 5.10.104 未満

CVE (情報セキュリティ共通脆弱性識別子)

No	Name	URL
Common Vulnerabilities and Exposures (CVE)
1	CVE-2022-48919	https://www.cve.org/CVERecord?id=CVE-2022-48919
National Vulnerability Database (NVD)
2	CVE-2022-48919	https://nvd.nist.gov/vuln/detail/CVE-2022-48919

CWE (共通脆弱性タイプ一覧)

No	Name	URL
JVNDB
1	CWE-415	https://cwe.mitre.org/data/definitions/415.html

ベンダー情報

No	Name	URL
Kernel.org git repositories
1	cifs: fix double free race when mount fails in cifs_get_root() (147a0e7)	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=147a0e71ccf96df9fc8c2ac500829d8e423ef02c
2	cifs: fix double free race when mount fails in cifs_get_root() (2fe0e28)	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=2fe0e281f7ad0a62259649764228227dd6b2561d
3	cifs: fix double free race when mount fails in cifs_get_root() (3d6cc98)	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=3d6cc9898efdfb062efb74dc18cfc700e082f5d5
4	cifs: fix double free race when mount fails in cifs_get_root() (546d608)	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=546d60859ecf13380fcabcbeace53a5971493a2b
5	cifs: fix double free race when mount fails in cifs_get_root() (563431c)	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=563431c1f3c8f2230e4a9c445fa23758742bc4f0
6	cifs: fix double free race when mount fails in cifs_get_root() (da834d6)	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=da834d6c1147c7519a9e55b510a03b7055104749
7	cifs: fix double free race when mount fails in cifs_get_root() (df9db1a)	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=df9db1a2af37f39ad1653c7b9b0d275d72d0bc67
8	cifs: fix double free race when mount fails in cifs_get_root() (e208668)	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=e208668ef7ba23efcbf76a8200cab8deee501c4d
Linux Kernel
9	Linux Kernel Archives	https://www.kernel.org

その他

No	Name	URL
JVN
1	JVNVU#99514792	https://jvn.jp/vu/JVNVU99514792/index.html

Change Log

No	Changed Details	Date of change
1	[2024年08月29日] 掲載	Aug. 29, 2024, 12:55 p.m.
2	[2025年12月15日] 参考情報：JVN (JVNVU#99514792) を追加	Dec. 15, 2025, 2:04 p.m.