CVE-2024-49900

jfs: Fix uninit-value access of new_ea in ea_buffer

Description

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().

Category

7.1
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.05%
Affected: Linux Linux
Affected: Linux Linux
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/stable/c/7b24d41d47a6805c45378debf8bd115675d41da8
https://git.kernel.org/stable/c/dac398ed272a378d2f42ac68ae408333a51baf52
https://git.kernel.org/stable/c/8b1dcf25c26d42e4a68c4725ce52a0543c7878cc patch
https://git.kernel.org/stable/c/d7444f91a9f93eaa48827087ed0f3381c194181d patch
https://git.kernel.org/stable/c/6041536d18c5f51a84bc37cd568cbab61870031e patch
https://git.kernel.org/stable/c/c076b3746224982eebdba5c9e4b1467e146c0d64 patch
https://git.kernel.org/stable/c/7c244d5b48284a770d96ff703df2dfeadf804a73 patch
https://git.kernel.org/stable/c/8ad8b531de79c348bcb8133e7f5e827b884226af patch
https://git.kernel.org/stable/c/2b59ffad47db1c46af25ccad157bb3b25147c35c patch

Frequently Asked Questions

What is the severity of CVE-2024-49900?
CVE-2024-49900 has been scored as a high severity vulnerability.
How to fix CVE-2024-49900?
To fix CVE-2024-49900, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-49900 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2024-49900 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-49900?
CVE-2024-49900 affects Linux Linux, Linux Linux.
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