CVE-2024-49900: jfs: Fix uninit-value access of new_ea in ea_buffer

First published: Mon Oct 21 2024(Updated: )

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().

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

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

• agent/title
• agent/type
• agent/first-publish-date
• agent/weakness
• agent/remedy
• agent/severity
• agent/author
• agent/references
• collector/mitre-cve
• source/MITRE
• agent/last-modified-date
• agent/trending
• collector/usn-cve
• source/Ubuntu
• collector/nvd-cve
• source/NVD
• agent/software-canonical-lookup
• agent/software-canonical-lookup-request
• collector/nvd-api
• collector/launchpad-cve
• source/Launchpad
• agent/source
• agent/softwarecombine
• agent/description
• agent/tags
• collector/security-tracker-debian
• source/Debian
• agent/event
• vendor/linux
• canonical/linux kernel
• version/linux kernel/5.11
• version/linux kernel/5.16
• version/linux kernel/6.2
• version/linux kernel/6.7
• version/linux kernel/6.11
• package-manager/debian