Memory leak in Linux kernel notify

1) Memory leak

EUVDB-ID: #VU90490

Risk: Low

CVSSv3.1: 4.8 [AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-9857

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to memory leak within the destroy_super_work() function in fs/super.c, within the fsnotify_sb_delete() function in fs/notify/fsnotify.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.0 - 5.0.2

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:5.0.2:*:*:*:*:*:*:*

External links

http://www.securityfocus.com/bid/107527
http://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs.git/commit/?h=fsnotify&id=62c9d2674b31d4c8a674bee86b7edc6da2803aea
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NXLZ2V2ES37A3J7DMK4MZYIWV2LEZFLM/
http://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PPH3B7FJOMWD5JWUPZKB6T44KNT4PX2L/
http://patchwork.kernel.org/patch/10836283/
http://security.netapp.com/advisory/ntap-20190404-0002/

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.