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No exploitation reportedFix available

CVE-2019-19377

No exploitation reported by the sources we read.

  • Published2019-11-29
  • Fixed in5.6.5 · 5.5.18 · 5.4.33 · 4.19.156
  • WeaknessCWE-416

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2019-11-2916:15CVE publishedNVD

Versions per branch

NVD
Linux linux kernel
BranchAffectedFixed in
5.6≥ 5.6, < 5.6.55.6.5
5.5≥ 5.5.0, < 5.5.185.5.18
5.4≥ 4.20, < 5.4.335.4.33
4.19≥ 2.6.12, < 4.19.1564.19.156
Netapp active iq unified manager
BranchAffectedFixed in
—all versionsno fix published
Netapp cloud backup
BranchAffectedFixed in
—all versionsno fix published

2 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • dtb-aarch64openSUSE:Leap 15.4all versions · fixed in 5.3.18-150300.59.71.1
  • dtb-aarch64openSUSE:Leap 15.3all versions · fixed in 5.3.18-150300.59.71.1and 2 other packages
  • kernelTuxCare:OracleLinux:6all versions · fixed in 2.6.32-754.35.8.el6.tuxcare.els35and 9 other packages
  • kernelTuxCare:CentOS:6all versions · fixed in 2.6.32-754.35.8.el6.tuxcare.els35and 9 other packages
  • kernelMageia:7all versions · fixed in 5.6.6-1.mga7and 1 other package
  • kernel-64kbSUSE:Linux Enterprise Module for Basesystem 15 SP3all versions · fixed in 5.3.18-150300.59.71.2and 4 other packages
  • kernel-64kbopenSUSE:Leap 15.3all versions · fixed in 5.3.18-150300.59.71.2and 8 other packages
  • kernel-azureSUSE:Linux Enterprise Server for SAP Applications 12 SP5all versions · fixed in 4.12.14-16.100.2

154 more package ranges on OSV.dev

Vendor advisories

  • CVE-2019-19377 Red Hat Product Security72 known affected

    kernel: use-after-free in btrfs_queue_work in fs/btrfs/async-thread.c

    kernel.src as a component of Red Hat Enterprise Linux 5 · kernel as a component of Red Hat Enterprise Linux 6 · kernel-abi-whitelists as a component of Red Hat Enterprise Linux 6 · +69 more

Full record on NVD

Fix

  1. Update Linux linux kernel to 5.6.5 · 5.5.18 · 5.4.33 · 4.19.156
  2. Workaround from the vendor Red Hat Product Security CVE-2019-19377 · 72 productsAs the btrfs module will be auto-loaded when required, its use can be disabled by preventing the module from loading with the following instructions: # echo "install btrfs /bin/true" >> /etc/modprobe.d/disable-btrfs.conf The system will need to be restarted if the BTRFS modules are loaded. In m…
  3. No fix available, says the vendor Red Hat Product Security CVE-2019-19377 · 16 productsAffected
  4. No fix planned, says the vendor Red Hat Product Security CVE-2019-19377 · 15 productsOut of support scope
  5. No fix planned, says the vendor Red Hat Product Security CVE-2019-19377 · 41 productsWill not fix

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2019-11-29
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-w83r-756w-m93f

Frequently asked questions

What is CVE-2019-19377?

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.

Is CVE-2019-19377 actively exploited?

Active exploitation of CVE-2019-19377 has not been confirmed. Its EPSS score was 3.4% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-19377?

CVE-2019-19377 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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