CVE-2019-19039
lowpriority · track · 22EPSS 0.007 · 53 %ileDEEURUUSEPSS · scored 2026-10-27
__btrfs_free_extent in fs/btrfs/extent-tree.c in the Linux kernel through 5.3.12 calls btrfs_print_leaf in a certain ENOENT case, which allows local users to obtain potentially sensitive information about register values via the dmesg program. NOTE: The BTRFS development team disputes this issues as not being a vulnerability because “1) The kernel provide facilities to restrict access to dmesg - dmesg_restrict=1 sysctl option. So it's really up to the system administrator to judge whether dmesg access shall be disallowed or not. 2) WARN/WARN_ON are widely used macros in the linux kernel. If this CVE is considered valid this would mean there are literally thousands CVE lurking in the kernel - something which clearly is not the case.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 1.9–5.5
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (19)
Products and version ranges known to be affected.
- NetApp ActiveIQ Unified Manager for VMware vSphereall versionscert_bundDEcpe:/a:netapp:active_iq_unified_manager:for_vmware_vsphere
advisories (1)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2025-2771Linux Kernel: Mehrere SchwachstellenDeutsch2019-11-20csaf · cert_bundDE
Ein lokaler Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um einen Denial of Service Angriff durchzuführen oder vertrauliche Daten einzusehen.
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (14)
External citations — patches, advisories, analysis.
- https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19039cnnvd
- https://lists.debian.org/debian-lts-announce/2020/12/msg00015.htmlcnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2019-19039cnnvd
- https://packetstormsecurity.com/files/158295/Ubuntu-Security-Notice-USN-4414-1.htmlcnnvd
- https://usn.ubuntu.com/4414-1/cnnvd
- https://vigilance.fr/vulnerability/Linux-kernel-information-disclosure-via-btrfs-free-extent-30924cnnvd
- https://www.auscert.org.au/bulletins/ESB-2020.2389/cnnvd
- https://www.auscert.org.au/bulletins/ESB-2020.4375/cnnvd
Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.
Free scan