CVE-2024-49900

jfs: Fix uninit-value access of new_ea in ea_buffer

Severity Score

"-"

*CVSS v-

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

In the Linux kernel, the following vulnerability has been resolved:

jfs: Fix uninit-value access of new_ea in ea_buffer

syzbot reports that lzo1x_1_do_compress is using uninit-value:

=====================================================
BUG: KMSAN: uninit-value in lzo1x_1_do_compress+0x19f9/0x2510 lib/lzo/lzo1x_compress.c:178

...

Uninit was stored to memory at:
ea_put fs/jfs/xattr.c:639 [inline]

...

Local variable ea_buf created at:
__jfs_setxattr+0x5d/0x1ae0 fs/jfs/xattr.c:662
__jfs_xattr_set+0xe6/0x1f0 fs/jfs/xattr.c:934

=====================================================

The reason is ea_buf->new_ea is not initialized properly.

Fix this by using memset to empty its content at the beginning
in ea_get().

*Credits: N/A

CVSS Scores

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2024-10-21 CVE Reserved
2024-10-21 CVE Published
2024-10-21 CVE Updated
---------- EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (7)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/8b1dcf25c26d42e4a68c4725ce52a0543c7878cc	2024-10-17
https://git.kernel.org/stable/c/d7444f91a9f93eaa48827087ed0f3381c194181d	2024-10-17
https://git.kernel.org/stable/c/6041536d18c5f51a84bc37cd568cbab61870031e	2024-10-17
https://git.kernel.org/stable/c/c076b3746224982eebdba5c9e4b1467e146c0d64	2024-10-10
https://git.kernel.org/stable/c/7c244d5b48284a770d96ff703df2dfeadf804a73	2024-10-10
https://git.kernel.org/stable/c/8ad8b531de79c348bcb8133e7f5e827b884226af	2024-10-10
https://git.kernel.org/stable/c/2b59ffad47db1c46af25ccad157bb3b25147c35c	2024-09-04

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.10.227 Search vendor "Linux" for product "Linux Kernel" and version " < 5.10.227"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.15.168 Search vendor "Linux" for product "Linux Kernel" and version " < 5.15.168"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 6.1.113 Search vendor "Linux" for product "Linux Kernel" and version " < 6.1.113"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 6.6.55 Search vendor "Linux" for product "Linux Kernel" and version " < 6.6.55"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 6.10.14 Search vendor "Linux" for product "Linux Kernel" and version " < 6.10.14"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 6.11.3 Search vendor "Linux" for product "Linux Kernel" and version " < 6.11.3"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 6.12-rc1 Search vendor "Linux" for product "Linux Kernel" and version " < 6.12-rc1"		en		Affected