CVE-2021-26931
 
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
An issue was discovered in the Linux kernel 2.6.39 through 5.10.16, as used in Xen. Block, net, and SCSI backends consider certain errors a plain bug, deliberately causing a kernel crash. For errors potentially being at least under the influence of guests (such as out of memory conditions), it isn't correct to assume a plain bug. Memory allocations potentially causing such crashes occur only when Linux is running in PV mode, though. This affects drivers/block/xen-blkback/blkback.c and drivers/xen/xen-scsiback.c.
Se detectó un problema en el kernel de Linux versiones 2.6.39 hasta 5.10.16, como es usado en Xen. Los backends de bloque, red y SCSI consideran determinados errores como un bug simple, causando deliberadamente un bloqueo del kernel. Para los errores que pueden estar al menos bajo la influencia de los invitados (como las condiciones de falta de memoria), no es correcto suponer un bug simple. Sin embargo, las asignaciones de memoria que pueden causar tales bloqueos ocurren solo cuando Linux se ejecuta en modo PV. Esto afecta a los archivos drivers/block/xen-blkback/blkback.c y drivers/xen/xen-scsiback.c
CVSS Scores
SSVC
- Decision:-
Timeline
- 2021-02-09 CVE Reserved
- 2021-02-17 CVE Published
- 2023-03-08 EPSS Updated
- 2024-08-03 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-770: Allocation of Resources Without Limits or Throttling
CAPEC
References (9)
URL | Date | SRC |
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URL | Date | SRC |
---|---|---|
http://xenbits.xen.org/xsa/advisory-362.html | 2024-03-25 |
Affected Vendors, Products, and Versions
Vendor | Product | Version | Other | Status | ||||||
---|---|---|---|---|---|---|---|---|---|---|
Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 2.6.39 <= 5.10.16 Search vendor "Linux" for product "Linux Kernel" and version " >= 2.6.39 <= 5.10.16" | - |
Affected
| ||||||
Fedoraproject Search vendor "Fedoraproject" | Fedora Search vendor "Fedoraproject" for product "Fedora" | 32 Search vendor "Fedoraproject" for product "Fedora" and version "32" | - |
Affected
| ||||||
Fedoraproject Search vendor "Fedoraproject" | Fedora Search vendor "Fedoraproject" for product "Fedora" | 33 Search vendor "Fedoraproject" for product "Fedora" and version "33" | - |
Affected
| ||||||
Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | 9.0 Search vendor "Debian" for product "Debian Linux" and version "9.0" | - |
Affected
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