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No exploitation reported

CVE-2019-19378

No exploitation reported by the sources we read.

  • Published2019-11-29
  • WeaknessCWE-787

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 can lead to slab-out-of-bounds write access in index_rbio_pages in fs/btrfs/raid56.c.

Timeline

dates in UTC
  1. 2019-11-2917:15CVE publishedNVD

Versions per branch

NVD
Linux linux kernel
BranchAffectedFixed in
5.0= 5.0.21no fix published

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

  • linuxUbuntu:Pro:20.04:LTSall versions · no fixed version listedand 21 other packages
  • linuxUbuntu:Pro:18.04:LTSall versions · no fixed version listedand 12 other packages
  • linuxUbuntu:Pro:16.04:LTSall versions · no fixed version listedand 7 other packages
  • linuxUbuntu:Pro:14.04:LTSall versions · no fixed version listedand 3 other packages
  • linuxUbuntu:26.10all versions · no fixed version listedand 8 other packages
  • linuxUbuntu:26.04:LTSall versions · no fixed version listedand 13 other packages
  • linuxUbuntu:25.10all versions · no fixed version listedand 8 other packages
  • linuxUbuntu:24.04:LTSall versions · no fixed version listedand 53 other packages

24 more package ranges on OSV.dev

Vendor advisories

  • CVE-2019-19378 Red Hat Product Security55 known affected

    kernel: out-of-bounds write in index_rbio_pages in fs/btrfs/raid56.c

    kernel as a component of Red Hat Enterprise Linux 6 · kernel-abi-whitelists as a component of Red Hat Enterprise Linux 6 · kernel-bootwrapper as a component of Red Hat Enterprise Linux 6 · +52 more

Full record on NVD

Fix

  1. Workaround from the vendor Red Hat Product Security CVE-2019-19378 · 55 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, it ma…
  2. No fix planned, says the vendor Red Hat Product Security CVE-2019-19378 · 14 productsOut of support scope
  3. No fix planned, says the vendor Red Hat Product Security CVE-2019-19378 · 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-9pm5-94qv-mm9q

Frequently asked questions

What is CVE-2019-19378?

In the Linux kernel 5.0.21, mounting a crafted btrfs filesystem image can lead to slab-out-of-bounds write access in index_rbio_pages in fs/btrfs/raid56.c.

Is CVE-2019-19378 actively exploited?

Active exploitation of CVE-2019-19378 has not been confirmed. Its EPSS score was 2.3% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-19378?

CVE-2019-19378 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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