CVE-2019-19813: canonical ubuntu_linux Use After Free
Vulnerability summary
CVE-2019-19813 is a high (CVSS 7.1) Use After Free vulnerability in canonical ubuntu_linux. EPSS estimates a 2.13% chance of exploitation in the next 30 days, higher than 81.9% of scored vulnerabilities. 1 public exploit is recorded.
Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 5 · Related 3Timeline
- 17-12-2019PublishedVulnerability 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 then making a syncfs system call can lead to a use-after-free in __mutex_lock in kernel/locking/mutex.c. This is related to mutex_can_spin_on_owner in kernel/locking/mutex.c, __btrfs_qgroup_free_meta in fs/btrfs/qgroup.c, and btrfs_insert_delayed_items in fs/btrfs/delayed-inode.c.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- NVDNIST5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
EPSS trend
Probability
2.13%
Chance of exploitation in the next 30 days
Percentile
82%
Versus all other CVEs
30-day change
No change 0.00 pp
From 2.13% 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.
Ubuntu31 products
- linuxAll versions (No fix recorded) | < 4.4.0-201.233 | < 4.15.0-109.110
- linux-aws< 4.4.0-1085.89 | < 4.4.0-1121.135 | < 4.15.0-1077.81
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-fips< 4.15.0-2022.22 | All versions (No fix recorded)
- linux-aws-hwe< 4.15.0-1079.83~16.04.1
Netapp10 products
- active_iq_unified_manager≥ 9.5 (No fix recorded)
- aff_a400_firmwarena
- aff_a700s_firmwarena
- data_availability_servicesna
- fas8300_firmwarena
Debian2 products
- linux< 5.2.6-1
- debian_linuxEOL9.0
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04 | 18.04
Linux1 product
- linux_kernel5.0.21
5 vendors · 45 products
References
11 links- github.com/bobfuzzer/CVE/tree/master/CVE-2019-19813X Refsource MISCREPORTExploitThird Party Advisory
lists.debian.org/debian-lts-announce/2020/09/msg00025.htmlMailing ListX Refsource MLISTThird Party Advisory- lists.debian.org/debian-lts-announce/2021/03/msg00010.htmlMailing ListX Refsource MLISTThird Party Advisory