PT-2019-6076 · Linux · Linux Kernel

Syzbot · Published 2019-06-04 · Updated 2023-01-24 · CVE-2019-25044

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 5.2

Description The issue is related to the use of memory after it has been freed in the block subsystem of the Linux kernel, specifically involving the blk mq free rqs and blk cleanup queue functions. This can potentially allow an attacker to access confidential data, compromise data integrity, and cause a denial of service. Additionally, it may lead to arbitrary code execution in the kernel context and privilege escalation.

Recommendations For Linux kernel versions prior to 5.2, update to version 5.2 or later to resolve the issue. At the moment, there is no information about additional mitigation measures for this specific vulnerability.

Exploit

Fix

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

BDU:2021-04713

CVE-2019-25044

Affected Products

Linux Kernel

References · 12

• 🔥 https://syzkaller.appspot.com/bug?id=36fe241584203cf394d44560a42e3430434f1213 · Exploit
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.2 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-25044 · Security Note
• https://bdu.fstec.ru/vul/2021-04713 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2019-25044 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2019-25044 · Vendor Advisory
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c3e2219216c92919a6bd1711f340f5faa98695e6 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2019-25044 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2019-25044 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-25044 · Vendor Advisory
• https://sites.google.com/view/syzscope/kasan-use-after-free-read-in-blk_mq_free_rqs · Note
• https://security.netapp.com/advisory/ntap-20210629-0006 · Note