CVE-2019-25044 Use after free in n/a

What is CVE-2019-25044?

CVE-2019-25044 is a high-severity use after free vulnerability in Linux kernel, published on 14 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The block subsystem in the Linux kernel before 5.2 has a use-after-free that can lead to arbitrary code execution in the kernel context and privilege escalation, aka CID-c3e2219216c9. This is related to blk_mq_free_rqs and blk_cleanup_queue.

Weakness: CWE-416

Which versions are affected by CVE-2019-25044?

It affects 12 products.

Products include Linux kernel, Netapp Cloud Backup, Netapp H300e Firmware, Netapp H300s Firmware, Netapp H410c Firmware, Netapp H410s Firmware and 6 more.

How do I fix CVE-2019-25044?

No fix has been published for CVE-2019-25044 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2019-25044 being exploited?

There is no known exploitation of CVE-2019-25044 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-frj7-v2p3-r97g, UBUNTU-CVE-2019-25044.