Bug 2245711 (CVE-2023-45898) - CVE-2023-45898 kernel: use-after-free in fs/ext4/extents_status.c
Summary: CVE-2023-45898 kernel: use-after-free in fs/ext4/extents_status.c
Keywords:
Status: NEW
Alias: CVE-2023-45898
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2245937
Blocks: 2245709
TreeView+ depends on / blocked
 
Reported: 2023-10-23 17:55 UTC by Marco Benatto
Modified: 2023-10-24 17:32 UTC (History)
45 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
A use-after-free flaw was found in the EXT4 file system, related to ext4_es_insert_extent, in the Linux Kernel. This issue may allow an attacker to create a crafted EXT4 file system which will trigger the vulnerability and lead the kernel to PANIC, causing a denial of service on the targeted system.
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

Description Marco Benatto 2023-10-23 17:55:43 UTC 
The Linux kernel before 6.5.4 has an es1 use-after-free in fs/ext4/extents_status.c, related to ext4_es_insert_extent.

https://github.com/torvalds/linux/commit/768d612f79822d30a1e7d132a4d4b05337ce42ec
https://lore.kernel.org/lkml/aa03f191-445c-0d2e-d6d7-0a3208d7df7a@huawei.com/T/
https://www.spinics.net/lists/stable-commits/msg317086.html
https://lkml.org/lkml/2023/8/13/477
https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.5.4
Comment 3 Alex 2023-10-24 16:29:38 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2245937]
Comment 4 Justin M. Forbes 2023-10-24 17:32:57 UTC 
This was fixed for Fedora with the 6.5.4 stable kernel update.
Note You need to log in before you can comment on or make changes to this bug.