SecuriTricks - CVE-2024-46840

Description

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

Product(s) Impacted

Vendor	Product	Versions
Linux	Linux Kernel	*

Weaknesses

Common security weaknesses mapped to this vulnerability.

*CPE(s)

Affected systems and software identified for this CVE.

Type	Vendor	Product	Version	Update	Edition	Language	Software Edition	Target Software	Target Hardware	Other Information
o	linux	linux_kernel	/	/	/	/	/	/	/	/
o	linux	linux_kernel	/	/	/	/	/	/	/	/
o	linux	linux_kernel	/	/	/	/	/	/	/	/
o	linux	linux_kernel	/	/	/	/	/	/	/	/
o	linux	linux_kernel	/	/	/	/	/	/	/	/
o	linux	linux_kernel	/	/	/	/	/	/	/	/
o	linux	linux_kernel	/	/	/	/	/	/	/	/

References

https://git.kernel.org/stable/c/03804641ec2d0da4fa088ad21c88e703d151ce16

https://git.kernel.org/stable/c/71291aa7246645ef622621934d2067400380645e

https://git.kernel.org/stable/c/728d4d045b628e006b48a448f3326a7194c88d32

https://git.kernel.org/stable/c/7d1df13bf078ffebfedd361d714ff6cee1ff01b9

https://git.kernel.org/stable/c/9cc887ac24b7a0598f4042ae9af6b9a33072f75b

https://git.kernel.org/stable/c/b8ccef048354074a548f108e51d0557d6adfd3a3

https://git.kernel.org/stable/c/c60676b81fab456b672796830f6d8057058f029c

https://git.kernel.org/stable/c/c847b28a799733b04574060ab9d00f215970627d

CVSS Score

5.5 / 10

CVSS Data

Attack Vector: LOCAL
Attack Complexity: LOW
Privileges Required: LOW
Scope: UNCHANGED
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: HIGH

View Vector String

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Date

Published: Sept. 27, 2024, 1:15 p.m.
Last Modified: Oct. 8, 2024, 6:15 p.m.

Status : Analyzed

CVE has had analysis completed and all data associations made.

More info

Source

416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVE-2024-46840