Medium severity · published Aug 8, 2021
CVE-2021-38203
btrfs in the Linux kernel before 5.13.4 allows attackers to cause a denial of service (deadlock) via processes that trigger allocation of new system chunks during times when there…
5.5
CVSS
0.4%
EPSS
No
On KEV
Description
btrfs in the Linux kernel before 5.13.4 allows attackers to cause a denial of service (deadlock) via processes that trigger allocation of new system chunks during times when there is a shortage of free space in the system space_info.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 30% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
before 5.13.4 · source: NVD
ES
Element Software · Netapp
All versions, or not specified · source: NVD
HB
Hci Bootstrap OS · Netapp
All versions, or not specified · source: NVD
HM
Hci Management Node · Netapp
All versions, or not specified · source: NVD
SO
Solidfire · Netapp
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-38203
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-38203
Mailing List
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4
Exploit
https://github.com/torvalds/linux/commit/1cb3db1cf383a3c7dbda1aa0ce748b0958759947
Third Party Advisory
https://security.netapp.com/advisory/ntap-20210902-0010/
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