Bug 1786160 (CVE-2019-19767) - CVE-2019-19767 kernel: use-after-free in __ext4_expand_extra_isize and ext4_xattr_set_entry related to fs/ext4/inode.c and fs/ext4/super.c
Summary: CVE-2019-19767 kernel: use-after-free in __ext4_expand_extra_isize and ext4_x...
Keywords:
Status: NEW
Alias: CVE-2019-19767
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1786161
Blocks: 1786162
TreeView+ depends on / blocked
 
Reported: 2019-12-23 17:19 UTC by Guilherme de Almeida Suckevicz
Modified: 2019-12-27 09:03 UTC (History)
46 users (show)

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Description Guilherme de Almeida Suckevicz 2019-12-23 17:19:49 UTC
The Linux kernel before 5.4.2 mishandles ext4_expand_extra_isize, as demonstrated by use-after-free errors in __ext4_expand_extra_isize and ext4_xattr_set_entry, related to fs/ext4/inode.c and fs/ext4/super.c.

References:
https://bugzilla.kernel.org/show_bug.cgi?id=205609
https://bugzilla.kernel.org/show_bug.cgi?id=205707

Upstream commit:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4ea99936a1630f51fc3a2d61a58ec4a1c4b7d55a

Comment 1 Guilherme de Almeida Suckevicz 2019-12-23 17:20:57 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1786161]


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