NVD Vulnerability Detail

CVE-2024-47692

Summary	In the Linux kernel, the following vulnerability has been resolved: nfsd: return -EINVAL when namelen is 0 When we have a corrupted main.sqlite in /var/lib/nfs/nfsdcld/, it may result in namelen being 0, which will cause memdup_user() to return ZERO_SIZE_PTR. When we access the name.data that has been assigned the value of ZERO_SIZE_PTR in nfs4_client_to_reclaim(), null pointer dereference is triggered. [ T1205] ================================================================== [ T1205] BUG: KASAN: null-ptr-deref in nfs4_client_to_reclaim+0xe9/0x260 [ T1205] Read of size 1 at addr 0000000000000010 by task nfsdcld/1205 [ T1205] [ T1205] CPU: 11 PID: 1205 Comm: nfsdcld Not tainted 5.10.0-00003-g2c1423731b8d #406 [ T1205] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ?-20190727_073836-buildvm-ppc64le-16.ppc.fedoraproject.org-3.fc31 04/01/2014 [ T1205] Call Trace: [ T1205] dump_stack+0x9a/0xd0 [ T1205] ? nfs4_client_to_reclaim+0xe9/0x260 [ T1205] __kasan_report.cold+0x34/0x84 [ T1205] ? nfs4_client_to_reclaim+0xe9/0x260 [ T1205] kasan_report+0x3a/0x50 [ T1205] nfs4_client_to_reclaim+0xe9/0x260 [ T1205] ? nfsd4_release_lockowner+0x410/0x410 [ T1205] cld_pipe_downcall+0x5ca/0x760 [ T1205] ? nfsd4_cld_tracking_exit+0x1d0/0x1d0 [ T1205] ? down_write_killable_nested+0x170/0x170 [ T1205] ? avc_policy_seqno+0x28/0x40 [ T1205] ? selinux_file_permission+0x1b4/0x1e0 [ T1205] rpc_pipe_write+0x84/0xb0 [ T1205] vfs_write+0x143/0x520 [ T1205] ksys_write+0xc9/0x170 [ T1205] ? __ia32_sys_read+0x50/0x50 [ T1205] ? ktime_get_coarse_real_ts64+0xfe/0x110 [ T1205] ? ktime_get_coarse_real_ts64+0xa2/0x110 [ T1205] do_syscall_64+0x33/0x40 [ T1205] entry_SYSCALL_64_after_hwframe+0x67/0xd1 [ T1205] RIP: 0033:0x7fdbdb761bc7 [ T1205] Code: 0f 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 514 [ T1205] RSP: 002b:00007fff8c4b7248 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ T1205] RAX: ffffffffffffffda RBX: 000000000000042b RCX: 00007fdbdb761bc7 [ T1205] RDX: 000000000000042b RSI: 00007fff8c4b75f0 RDI: 0000000000000008 [ T1205] RBP: 00007fdbdb761bb0 R08: 0000000000000000 R09: 0000000000000001 [ T1205] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000042b [ T1205] R13: 0000000000000008 R14: 00007fff8c4b75f0 R15: 0000000000000000 [ T1205] ================================================================== Fix it by checking namelen.
Publication Date	Oct. 21, 2024, 9:15 p.m.
Registration Date	Oct. 22, 2024, 5 a.m.
Last Update	Nov. 9, 2024, 1:15 a.m.

CVSS3.1 : MEDIUM
スコア	6.5
Vector	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
攻撃元区分(AV)	ネットワーク
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)	なし
完全性への影響(I)	なし
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::::::::	6.11			6.11.2
cpe:2.3:o:linux:linux_kernel::::::::	6.7			6.10.13
cpe:2.3:o:linux:linux_kernel::::::::	6.2			6.6.54
cpe:2.3:o:linux:linux_kernel::::::::	5.16			6.1.113
cpe:2.3:o:linux:linux_kernel::::::::	5.11			5.15.168
cpe:2.3:o:linux:linux_kernel::::::::	5.2			5.10.227

Related information, measures and tools

No	URL	タグ
1	https://git.kernel.org/stable/c/0f1d007bbea38a61cf9c5392708dc70ae9d84a3d	Patch
2	https://git.kernel.org/stable/c/b7b7a8df41ef18862dd6b22289fb46c2c12398af	Patch
3	https://git.kernel.org/stable/c/84a563d136faf514fdad1ade28d7a142fd313cb8	Patch
4	https://git.kernel.org/stable/c/318f70857caab3da9a6ada9bc8c1f4f7591b695e	Patch
5	https://git.kernel.org/stable/c/766d5fbd78f7a52b3888449a0358760477b74602	Patch
6	https://git.kernel.org/stable/c/1ff8be8d008b9ddc8e7043fbddd37d5d451b271b	Patch
7	https://git.kernel.org/stable/c/22451a16b7ab7debefce660672566be887db1637	Patch
8	https://git.kernel.org/stable/c/6d07040ae5c2214e39c7444d898039c9e655a79a

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-476	NULL ポインタデリファレンス	https://cwe.mitre.org/data/definitions/476.html

JVN Vulnerability Information

Linux の Linux Kernel における NULL ポインタデリファレンスに関する脆弱性

Title	Linux の Linux Kernel における NULL ポインタデリファレンスに関する脆弱性
Summary	Linux の Linux Kernel には、NULL ポインタデリファレンスに関する脆弱性が存在します。
Possible impacts	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	Sept. 20, 2024, midnight
Registration Date	Oct. 28, 2024, 5:18 p.m.
Last Update	Sept. 9, 2025, 10:32 a.m.

Affected System

Linux

Linux Kernel 5.11 以上 5.15.168 未満

Linux Kernel 5.16 以上 6.1.113 未満

Linux Kernel 5.2 以上 5.10.227 未満

Linux Kernel 6.11 以上 6.11.2 未満

Linux Kernel 6.2 以上 6.6.54 未満

Linux Kernel 6.7 以上 6.10.13 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-2024-47692	https://www.cve.org/CVERecord?id=CVE-2024-47692
National Vulnerability Database (NVD)
2	CVE-2024-47692	https://nvd.nist.gov/vuln/detail/CVE-2024-47692

CWE (共通脆弱性タイプ一覧)

No	Name	URL
JVNDB
1	CWE-476	http://cwe.mitre.org/data/definitions/476.html

ベンダー情報

No	Name	URL
Kernel.org git repositories
1	nfsd: return -EINVAL when namelen is 0 (0f1d007)	https://git.kernel.org/stable/c/0f1d007bbea38a61cf9c5392708dc70ae9d84a3d
2	nfsd: return -EINVAL when namelen is 0 (1ff8be8)	https://git.kernel.org/stable/c/1ff8be8d008b9ddc8e7043fbddd37d5d451b271b
3	nfsd: return -EINVAL when namelen is 0 (22451a1)	https://git.kernel.org/stable/c/22451a16b7ab7debefce660672566be887db1637
4	nfsd: return -EINVAL when namelen is 0 (318f708)	https://git.kernel.org/stable/c/318f70857caab3da9a6ada9bc8c1f4f7591b695e
5	nfsd: return -EINVAL when namelen is 0 (766d5fb)	https://git.kernel.org/stable/c/766d5fbd78f7a52b3888449a0358760477b74602
6	nfsd: return -EINVAL when namelen is 0 (84a563d)	https://git.kernel.org/stable/c/84a563d136faf514fdad1ade28d7a142fd313cb8
7	nfsd: return -EINVAL when namelen is 0 (b7b7a8d)	https://git.kernel.org/stable/c/b7b7a8df41ef18862dd6b22289fb46c2c12398af
Linux Kernel
8	Linux Kernel Archives	https://www.kernel.org

その他

No	Name	URL
ICS-CERT ADVISORY
1	ICSA-25-226-07	https://www.cisa.gov/news-events/ics-advisories/icsa-25-226-07
JVN
2	JVNVU#92169998	https://jvn.jp/vu/JVNVU92169998/index.html

Change Log

No	Changed Details	Date of change
1	[2024年10月28日] 掲載	Oct. 28, 2024, 5:15 p.m.
2	[2025年08月19日] 参考情報：JVN (JVNVU#92169998) を追加参考情報：ICS-CERT ADVISORY (ICSA-25-226-07) を追加	Aug. 19, 2025, 12:08 p.m.