CVE-2024-46840

CVE Details

Release Date:

2024-09-27

Description

In the Linux kernel, the following vulnerability has been resolved:\nbtrfs: clean up our handling of refs == 0 in snapshot delete\nIn reada we BUG_ON(refs == 0), which could be unkind since we aren't\nholding a lock on the extent leaf and thus could get a transient\nincorrect answer. In walk_down_proc we also BUG_ON(refs == 0), which\ncould happen if we have extent tree corruption. Change that to return\n-EUCLEAN. In do_walk_down() we catch this case and handle it correctly,\nhowever we return -EIO, which -EUCLEAN is a more appropriate error code.\nFinally in walk_up_proc we have the same BUG_ON(refs == 0), so convert\nthat to proper error handling. Also adjust the error message so we can\nactually do something with the information.

See more information about CVE-2024-46840 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-2024-12813	2024-11-12
Oracle Linux version 7 (kernel-uek)	ELSA-2024-12868	2024-12-06
Oracle Linux version 8 (kernel-uek)	ELSA-2024-12813	2024-11-12
Oracle Linux version 8 (kernel-uek)	ELSA-2024-12815	2024-11-11
Oracle Linux version 9 (kernel-uek)	ELSA-2024-12815	2024-11-11