Bug 1784920 (CVE-2019-19815) - CVE-2019-19815 kernel: NULL pointer dereference in f2fs_recover_fsync_data in fs/f2fs/recovery.c
Summary: CVE-2019-19815 kernel: NULL pointer dereference in f2fs_recover_fsync_data in...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2019-19815
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: 1784921
Blocks: Embargoed1784922
TreeView+ depends on / blocked
 
Reported: 2019-12-18 17:53 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-02-16 20:51 UTC (History)
47 users (show)

Fixed In Version:
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Doc Text:
A NULL pointer dereference flaw was found in F2FS_P_SB in fs/f2fs/f2fs.h in the F2FS filesystem exploiting the NAND flash memory-based storage device. This flaw allows an attacker to crash the system or leak internal kernel information.
Clone Of:
Environment:
Last Closed: 2020-04-07 16:31:53 UTC

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Description Guilherme de Almeida Suckevicz 2019-12-18 17:53:43 UTC 
A NULL pointer dereference flaw was found in F2FS_P_SB in fs/f2fs/f2fs.h in F2FS filesystem exploiting NAND flash memory-based storage device. This flaw could allow an attacker to crash the system or leak internal kernel information.

Reference:
https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19815

Upstream commit:
https://github.com/torvalds/linux/commit/4969c06a0d83c9c3dc50b8efcdc8eeedfce896f6#diff-41a7fa4590d2af87e82101f2b4dadb56
Comment 1 Guilherme de Almeida Suckevicz 2019-12-18 17:54:28 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1784921]
Comment 2 Justin M. Forbes 2019-12-19 15:20:42 UTC 
This is fixed for Fedora with the 5.3.x kernel rebases.
Comment 5 Rohit Keshri 2020-04-07 10:57:22 UTC 
Mitigation:

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Comment 6 Rohit Keshri 2020-04-07 10:58:05 UTC 
Statement:

There was no shipped kernel version were seen affected with this problem. These files are not built in our source code.
Comment 8 Product Security DevOps Team 2020-04-07 16:31:53 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2019-19815
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