NVD Vulnerability Detail

CVE-2024-47719

Summary	In the Linux kernel, the following vulnerability has been resolved: iommufd: Protect against overflow of ALIGN() during iova allocation Userspace can supply an iova and uptr such that the target iova alignment becomes really big and ALIGN() overflows which corrupts the selected area range during allocation. CONFIG_IOMMUFD_TEST can detect this: WARNING: CPU: 1 PID: 5092 at drivers/iommu/iommufd/io_pagetable.c:268 iopt_alloc_area_pages drivers/iommu/iommufd/io_pagetable.c:268 [inline] WARNING: CPU: 1 PID: 5092 at drivers/iommu/iommufd/io_pagetable.c:268 iopt_map_pages+0xf95/0x1050 drivers/iommu/iommufd/io_pagetable.c:352 Modules linked in: CPU: 1 PID: 5092 Comm: syz-executor294 Not tainted 6.10.0-rc5-syzkaller-00294-g3ffea9a7a6f7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 RIP: 0010:iopt_alloc_area_pages drivers/iommu/iommufd/io_pagetable.c:268 [inline] RIP: 0010:iopt_map_pages+0xf95/0x1050 drivers/iommu/iommufd/io_pagetable.c:352 Code: fc e9 a4 f3 ff ff e8 1a 8b 4c fc 41 be e4 ff ff ff e9 8a f3 ff ff e8 0a 8b 4c fc 90 0f 0b 90 e9 37 f5 ff ff e8 fc 8a 4c fc 90 <0f> 0b 90 e9 68 f3 ff ff 48 c7 c1 ec 82 ad 8f 80 e1 07 80 c1 03 38 RSP: 0018:ffffc90003ebf9e0 EFLAGS: 00010293 RAX: ffffffff85499fa4 RBX: 00000000ffffffef RCX: ffff888079b49e00 RDX: 0000000000000000 RSI: 00000000ffffffef RDI: 0000000000000000 RBP: ffffc90003ebfc50 R08: ffffffff85499b30 R09: ffffffff85499942 R10: 0000000000000002 R11: ffff888079b49e00 R12: ffff8880228e0010 R13: 0000000000000000 R14: 1ffff920007d7f68 R15: ffffc90003ebfd00 FS: 000055557d760380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000005fdeb8 CR3: 000000007404a000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> iommufd_ioas_copy+0x610/0x7b0 drivers/iommu/iommufd/ioas.c:274 iommufd_fops_ioctl+0x4d9/0x5a0 drivers/iommu/iommufd/main.c:421 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Cap the automatic alignment to the huge page size, which is probably a better idea overall. Huge automatic alignments can fragment and chew up the available IOVA space without any reason.
Publication Date	Oct. 21, 2024, 9:15 p.m.
Registration Date	Oct. 22, 2024, 5 a.m.
Last Update	Oct. 25, 2024, 1:21 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::::::::	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

Related information, measures and tools

No	URL	タグ
1	https://git.kernel.org/stable/c/cd6dd564ae7d99967ef50078216929418160b30e	Patch
2	https://git.kernel.org/stable/c/a6e9f9fd14772c0b23c6d1d7002d98f9d27cb1f6	Patch
3	https://git.kernel.org/stable/c/72b78287ce92802e8ba678181a34b84ae844a112	Patch
4	https://git.kernel.org/stable/c/8f6887349b2f829a4121c518aeb064fc922714e4	Patch

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-787	境界外書き込み	https://cwe.mitre.org/data/definitions/787.html

JVN Vulnerability Information

Linux の Linux Kernel における境界外書き込みに関する脆弱性

Title	Linux の Linux Kernel における境界外書き込みに関する脆弱性
Summary	Linux の Linux Kernel には、境界外書き込み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	Sept. 5, 2024, midnight
Registration Date	Oct. 25, 2024, 4:08 p.m.
Last Update	Oct. 25, 2024, 4:08 p.m.

Affected System

Linux

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-2024-47719	https://www.cve.org/CVERecord?id=CVE-2024-47719
National Vulnerability Database (NVD)
2	CVE-2024-47719	https://nvd.nist.gov/vuln/detail/CVE-2024-47719

CWE (共通脆弱性タイプ一覧)

No	Name	URL
JVNDB
1	CWE-787	https://cwe.mitre.org/data/definitions/787.html

ベンダー情報

No	Name	URL
Kernel.org git repositories
1	iommufd: Protect against overflow of ALIGN() during iova allocation (72b7828)	https://git.kernel.org/stable/c/72b78287ce92802e8ba678181a34b84ae844a112
2	iommufd: Protect against overflow of ALIGN() during iova allocation (8f68873)	https://git.kernel.org/stable/c/8f6887349b2f829a4121c518aeb064fc922714e4
3	iommufd: Protect against overflow of ALIGN() during iova allocation (a6e9f9f)	https://git.kernel.org/stable/c/a6e9f9fd14772c0b23c6d1d7002d98f9d27cb1f6
4	iommufd: Protect against overflow of ALIGN() during iova allocation (cd6dd56)	https://git.kernel.org/stable/c/cd6dd564ae7d99967ef50078216929418160b30e
Linux Kernel
5	Linux Kernel Archives	https://www.kernel.org

Change Log

No	Changed Details	Date of change
1	[2024年10月25日] 掲載	Oct. 25, 2024, 10:36 a.m.