Use After Free in Linux Kernel
CVE-2019-19448
In the Linux kernel 5.0.21 and 5.3.11, mounting a crafted btrfs filesystem image, performing some operations, and then making a syncfs system call can lead to a use-after-free in try_merge_free_space in fs/btrfs/free-space-cache.c because the pointer to a left data structure can be the same as the pointer to a right data structure.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.021 (82.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 82nd percentile — 82.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.021 · newest: 0.021 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/bobfuzzer/CVE/tree/master/CVE-2019-19448 (Exploit, Third Party Advisory)
- security.netapp.com/advisory/ntap-20200103-0001/ (Third Party Advisory)
- lists.debian.org/debian-lts-announce/2020/09/msg00025.html (mailing-list, Mailing List, Third Party Advisory)
- usn.ubuntu.com/4578-1/ (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2020/10/msg00032.html (mailing-list, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2020/10/msg00034.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-19448?
- CVE-2019-19448 is a high-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 7.8/10. Published 2019-12-08.
- How severe is CVE-2019-19448?
- High severity. CVSS v3 base score is 7.8 out of 10.