CVE-2019-19377: linux linux_kernel Use After Free
Vulnerability summary
CVE-2019-19377 is a high (CVSS 7.8) Use After Free vulnerability in linux linux_kernel. EPSS estimates a 3.40% chance of exploitation in the next 30 days, higher than 88.8% of scored vulnerabilities. 1 public exploit is recorded.
Public exploit (GitHub, Date unknown)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 19 · Related 16Timeline
- 29-11-2019PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
In the Linux kernel 5.0.21, mounting a crafted btrfs filesystem image, performing some operations, and unmounting can lead to a use-after-free in btrfs_queue_work in fs/btrfs/async-thread.c.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS trend
Probability
3.40%
Chance of exploitation in the next 30 days
Percentile
89%
Versus all other CVEs
30-day change
No change 0.00 pp
From 3.40% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundCve
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu39 products
- linuxAll versions (No fix recorded) | < 4.15.0-109.110 | < 5.4.0-31.35
- linux-awsAll versions (No fix recorded) | < 4.15.0-1077.81 | < 5.4.0-1011.11
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.3< 5.3.0-1019.21~18.04.1
- linux-aws-fips< 4.15.0-2022.22 | All versions (No fix recorded)
Netapp4 products
Debian1 product
- linux< 5.6.7-1
Linux1 product
- linux_kernel≥ 2.6.12, < 4.19.156 | ≥ 4.20, < 5.4.33 | ≥ 5.5.0, < 5.5.18 | ≥ 5.6, < 5.6.5
4 vendors · 45 products
References
12 links- github.com/bobfuzzer/CVE/tree/master/CVE-2019-19377X Refsource MISCREPORTExploitThird Party Advisory
lists.debian.org/debian-lts-announce/2020/12/msg00015.htmlMailing ListX Refsource MLISTThird Party Advisory