CVE-2024-49959

CVE Details

Release Date:

2024-10-21

Description

In the Linux kernel, the following vulnerability has been resolved:\njbd2: stop waiting for space when jbd2_cleanup_journal_tail() returns error\nIn __jbd2_log_wait_for_space(), we might call jbd2_cleanup_journal_tail()\nto recover some journal space. But if an error occurs while executing\njbd2_cleanup_journal_tail() (e.g., an EIO), we don't stop waiting for free\nspace right away, we try other branches, and if j_committing_transaction\nis NULL (i.e., the tid is 0), we will get the following complain:\n============================================\nJBD2: I/O error when updating journal superblock for sdd-8.\n__jbd2_log_wait_for_space: needed 256 blocks and only had 217 space available\n__jbd2_log_wait_for_space: no way to get more journal space in sdd-8\n------------[ cut here ]------------\nWARNING: CPU: 2 PID: 139804 at fs/jbd2/checkpoint.c:109 __jbd2_log_wait_for_space+0x251/0x2e0\nModules linked in:\nCPU: 2 PID: 139804 Comm: kworker/u8:3 Not tainted 6.6.0+ #1\nRIP: 0010:__jbd2_log_wait_for_space+0x251/0x2e0\nCall Trace:\n\nadd_transaction_credits+0x5d1/0x5e0\nstart_this_handle+0x1ef/0x6a0\njbd2__journal_start+0x18b/0x340\next4_dirty_inode+0x5d/0xb0\n__mark_inode_dirty+0xe4/0x5d0\ngeneric_update_time+0x60/0x70\n[...]\n============================================\nSo only if jbd2_cleanup_journal_tail() returns 1, i.e., there is nothing to\nclean up at the moment, continue to try to reclaim free space in other ways.\nNote that this fix relies on commit 6f6a6fda2945 ('jbd2: fix ocfs2 corrupt\nwhen updating journal superblock fails') to make jbd2_cleanup_journal_tail\nreturn the correct error code.

See more information about CVE-2024-49959 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:	None
Integrity:	None
Availability:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 7 (kernel-uek)	ELSA-2024-12884	2024-12-16
Oracle Linux version 8 (kernel-uek)	ELSA-2024-12884	2024-12-16
Oracle Linux version 8 (kernel-uek)	ELSA-2024-12887	2024-12-18
Oracle Linux version 9 (kernel-uek)	ELSA-2024-12887	2024-12-18