CVE-2024-37078

CVE Details

Release Date:	2024-06-25
Impact:	Low	What is this?

Description

In the Linux kernel, the following vulnerability has been resolved:\nnilfs2: fix potential kernel bug due to lack of writeback flag waiting\nDestructive writes to a block device on which nilfs2 is mounted can cause\na kernel bug in the folio/page writeback start routine or writeback end\nroutine (__folio_start_writeback in the log below):\nkernel BUG at mm/page-writeback.c:3070!\nOops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI\n...\nRIP: 0010:__folio_start_writeback+0xbaa/0x10e0\nCode: 25 ff 0f 00 00 0f 84 18 01 00 00 e8 40 ca c6 ff e9 17 f6 ff ff\ne8 36 ca c6 ff 4c 89 f7 48 c7 c6 80 c0 12 84 e8 e7 b3 0f 00 90 <0f>\n0b e8 1f ca c6 ff 4c 89 f7 48 c7 c6 a0 c6 12 84 e8 d0 b3 0f 00\n...\nCall Trace:\n\nnilfs_segctor_do_construct+0x4654/0x69d0 [nilfs2]\nnilfs_segctor_construct+0x181/0x6b0 [nilfs2]\nnilfs_segctor_thread+0x548/0x11c0 [nilfs2]\nkthread+0x2f0/0x390\nret_from_fork+0x4b/0x80\nret_from_fork_asm+0x1a/0x30\n\nThis is because when the log writer starts a writeback for segment summary\nblocks or a super root block that use the backing device's page cache, it\ndoes not wait for the ongoing folio/page writeback, resulting in an\ninconsistent writeback state.\nFix this issue by waiting for ongoing writebacks when putting\nfolios/pages on the backing device into writeback state.

See more information about CVE-2024-37078 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 metrics

Base Score:	5.5
Vector String:	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Version:	3.1
Attack Vector:	Local
Attack Complexity:	Low
Privileges Required:	Low
User Interaction:	None
Scope:	Unchanged
Confidentiality Impact:	None
Integrity Impact:	None
Availability Impact:	High

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