CVE-2019-19816
In the Linux kernel 5.0.21, mounting a crafted btrfs filesystem image and performing some operations can cause slab-out-of-bounds write access in __btrfs_map_block in fs/btrfs/volumes.c, because a value of 1 for the number of data stripes is mishandled.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.29%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In the Linux kernel 5.0.21, mounting a crafted btrfs filesystem image and performing some operations can cause slab-out-of-bounds write access in __btrfs_map_block in fs/btrfs/volumes.c, because a value of 1 for the number of data stripes is mishandled.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 3.29% probability · 88th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- linux/linux kernel · canonical/ubuntu linux · debian/debian linux · netapp/active iq unified manager · netapp/data availability services · netapp/hci management node · netapp/solidfire · netapp/steelstore cloud integrated storage · netapp/aff a700s firmware · netapp/fas8300 firmware · netapp/fas8700 firmware · netapp/aff a400 firmware · netapp/h610s firmware
- Source
- cve@mitre.org
EPSS 3.3% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19816Exploit, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/09/msg00025.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/12/msg00015.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/03/msg00010.htmlMailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20200103-0001/Third Party Advisory
- https://usn.ubuntu.com/4414-1/Third Party Advisory
- https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19816Exploit, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/09/msg00025.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/12/msg00015.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/03/msg00010.htmlMailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20200103-0001/Third Party Advisory
- https://usn.ubuntu.com/4414-1/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.