Описание
An issue was discovered in Xen through 4.13.x, allowing guest OS users to cause a denial of service because of a bad error path in GNTTABOP_map_grant. Grant table operations are expected to return 0 for success, and a negative number for errors. Some misplaced brackets cause one error path to return 1 instead of a negative value. The grant table code in Linux treats this condition as success, and proceeds with incorrectly initialised state. A buggy or malicious guest can construct its grant table in such a way that, when a backend domain tries to map a grant, it hits the incorrect error path. This will crash a Linux based dom0 or backend domain.
| Релиз | Статус | Примечание |
|---|---|---|
| bionic | ignored | end of standard support, was needs-triage |
| devel | not-affected | 4.11.4-1 |
| eoan | ignored | end of life |
| esm-apps/focal | released | 4.11.3+24-g14b62ab3e5-1ubuntu2.3 |
| esm-apps/jammy | not-affected | 4.11.4-1 |
| esm-apps/noble | not-affected | 4.11.4-1 |
| esm-infra-legacy/trusty | DNE | |
| esm-infra/bionic | needs-triage | |
| esm-infra/xenial | needs-triage | |
| focal | released | 4.11.3+24-g14b62ab3e5-1ubuntu2.3 |
Показывать по
EPSS
2.1 Low
CVSS2
5.5 Medium
CVSS3
Связанные уязвимости
An issue was discovered in Xen through 4.13.x, allowing guest OS users to cause a denial of service because of a bad error path in GNTTABOP_map_grant. Grant table operations are expected to return 0 for success, and a negative number for errors. Some misplaced brackets cause one error path to return 1 instead of a negative value. The grant table code in Linux treats this condition as success, and proceeds with incorrectly initialised state. A buggy or malicious guest can construct its grant table in such a way that, when a backend domain tries to map a grant, it hits the incorrect error path. This will crash a Linux based dom0 or backend domain.
An issue was discovered in Xen through 4.13.x, allowing guest OS users to cause a denial of service because of a bad error path in GNTTABOP_map_grant. Grant table operations are expected to return 0 for success, and a negative number for errors. Some misplaced brackets cause one error path to return 1 instead of a negative value. The grant table code in Linux treats this condition as success, and proceeds with incorrectly initialised state. A buggy or malicious guest can construct its grant table in such a way that, when a backend domain tries to map a grant, it hits the incorrect error path. This will crash a Linux based dom0 or backend domain.
An issue was discovered in Xen through 4.13.x, allowing guest OS users ...
An issue was discovered in Xen through 4.13.x, allowing guest OS users to cause a denial of service because of a bad error path in GNTTABOP_map_grant. Grant table operations are expected to return 0 for success, and a negative number for errors. Some misplaced brackets cause one error path to return 1 instead of a negative value. The grant table code in Linux treats this condition as success, and proceeds with incorrectly initialised state. A buggy or malicious guest can construct its grant table in such a way that, when a backend domain tries to map a grant, it hits the incorrect error path. This will crash a Linux based dom0 or backend domain.
Уязвимость компонента GNTTABOP_map_grant гипервизора Xen, позволяющая нарушителю вызвать отказ в обслуживании
EPSS
2.1 Low
CVSS2
5.5 Medium
CVSS3