__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 Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Dec 7, 2020 | Nov 21, 2019 |
| Freebsd | — | Upgrade gitlab-ce | Dec 10, 2025 | Oct 2, 2019 |
| Huawei Euleros 2_0_sp5 | — | Upgrade python-perfUpgrade kernel-develUpgrade kernel-toolsUpgrade perfUpgrade kernel-tools-libsUpgrade kernelUpgrade kernel-headers | Sep 3, 2020 | Nov 21, 2019 |
| Huawei Euleros 2_0_sp8 | — | Upgrade kernel-sourceUpgrade bpftoolUpgrade kernel-develUpgrade kernel-tools-libsUpgrade kernel-toolsUpgrade python3-perfUpgrade python-perfUpgrade kernelUpgrade kernel-headersUpgrade perf | Apr 21, 2020 | Nov 21, 2019 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Nov 21, 2019 |
| Ubuntu | — | Upgrade linux-image-gkeUpgrade linux-image-raspi2Upgrade linux-image-4.15.0-1069-kvmUpgrade linux-image-4.15.0-1081-snapdragonUpgrade linux-image-azureUpgrade linux-image-4.15.0-109-generic-lpaeUpgrade linux-image-kvmUpgrade linux-image-4.15.0-109-lowlatencyUpgrade linux-image-snapdragonUpgrade linux-image-virtualUpgrade linux-image-azure-lts-18.04Upgrade linux-image-generic-lpae-hwe-16.04Upgrade linux-image-4.15.0-1065-raspi2Upgrade linux-image-4.15.0-1074-awsUpgrade linux-image-4.15.0-109-genericUpgrade linux-image-gcpUpgrade linux-image-oracle-lts-18.04Upgrade linux-image-gcp-lts-18.04Upgrade linux-image-generic-hwe-16.04Upgrade linux-image-aws-lts-18.04Upgrade linux-image-4.15.0-107-genericUpgrade linux-image-4.15.0-1091-azureUpgrade linux-image-4.15.0-1046-oracleUpgrade linux-image-4.15.0-107-generic-lpaeUpgrade linux-image-4.15.0-1091-oemUpgrade linux-image-lowlatency-hwe-16.04Upgrade linux-image-4.15.0-1078-gcpUpgrade linux-image-4.15.0-1064-gkeUpgrade linux-image-virtual-hwe-16.04Upgrade linux-image-4.15.0-107-lowlatencyUpgrade linux-image-4.15.0-1048-oracleUpgrade linux-image-aws-hweUpgrade linux-image-generic-lpaeUpgrade linux-image-gke-4.15Upgrade linux-image-lowlatencyUpgrade linux-image-genericUpgrade linux-image-4.15.0-1077-awsUpgrade linux-image-oemUpgrade linux-image-oracle | Aug 5, 2020 | Nov 21, 2019 |
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