CVE-2019-15791 is a refcount underflow vulnerability in the shiftfs component of the Linux kernel, specifically affecting Ubuntu 5.0 and 5.3 kernel series. This flaw allows a local attacker to achieve high impact on confidentiality, integrity, and availability due to a missing reference count during file descriptor replacement. While no active exploitation is reported and community discussion is minimal, a public exploit (EDB-47693) exists, indicating its exploitability. The vulnerability carries a CVSS score of 7.8 (High) and a FAUCET Risk Score of 89/100.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
5.0CPE matchmatch criteria | cpe:2.3:o:linux:linux_kernel:5.0:*:*:*:*:*:*:* | ||
5.3CPE matchmatch criteria | cpe:2.3:o:linux:linux_kernel:5.3:*:*:*:*:*:*:* | ||
18.04CPE matchmatch criteria | cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* | ||
19.04CPE matchmatch criteria | cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.