CVE-2021-38203
Ubuntu Security Notice USN-5096-1
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
1Exploited in Wild
-Decision
Descriptions
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.
btrfs en el kernel de Linux versiones anteriores a 5.13.4, permite a atacantes causar una denegación de servicio (bloqueo) por medio de procesos que desencadenan la asignación de nuevos trozos del sistema durante los momentos en que hay una escasez de espacio libre en el space_info del sistema
Valentina Palmiotti discovered that the io_uring subsystem in the Linux kernel could be coerced to free adjacent memory. A local attacker could use this to execute arbitrary code. Benedict Schlueter discovered that the BPF subsystem in the Linux kernel did not properly protect against Speculative Store Bypass side- channel attacks in some situations. A local attacker could possibly use this to expose sensitive information. Various other issues were also addressed.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2021-08-08 CVE Reserved
- 2021-08-08 CVE Published
- 2024-08-04 CVE Updated
- 2024-08-04 First Exploit
- 2025-03-29 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
CWE
- CWE-667: Improper Locking
CAPEC
References (3)
| URL | Tag | Source |
|---|---|---|
| https://security.netapp.com/advisory/ntap-20210902-0010 | Third Party Advisory |
|
| URL | Date | SRC |
|---|---|---|
| https://github.com/torvalds/linux/commit/1cb3db1cf383a3c7dbda1aa0ce748b0958759947 | 2024-08-04 |
| URL | Date | SRC |
|---|---|---|
| https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4 | 2022-05-03 |
| URL | Date | SRC |
|---|
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Netapp Search vendor "Netapp" | Hci Bootstrap Os Search vendor "Netapp" for product "Hci Bootstrap Os" | - | - |
Affected
| in | Netapp Search vendor "Netapp" | Hci Compute Node Search vendor "Netapp" for product "Hci Compute Node" | - | - |
Safe
|
| Netapp Search vendor "Netapp" | Element Software Search vendor "Netapp" for product "Element Software" | - | - |
Affected
| in | Netapp Search vendor "Netapp" | Hci Storage Node Search vendor "Netapp" for product "Hci Storage Node" | - | - |
Safe
|
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | < 5.13.4 Search vendor "Linux" for product "Linux Kernel" and version " < 5.13.4" | - |
Affected
| ||||||
| Netapp Search vendor "Netapp" | Hci Management Node Search vendor "Netapp" for product "Hci Management Node" | - | - |
Affected
| ||||||
| Netapp Search vendor "Netapp" | Solidfire Search vendor "Netapp" for product "Solidfire" | - | - |
Affected
| ||||||