VulnerabilityModified
CVE-2022-1158
When updating a guest's page table entry, vm_pgoff was improperly used as the offset to get the page's pfn.
HIGH 7.8EPSS 0.40%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.40%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A flaw was found in KVM. When updating a guest's page table entry, vm_pgoff was improperly used as the offset to get the page's pfn. As vaddr and vm_pgoff are controllable by user-mode processes, this flaw allows unprivileged local users on the host to write outside the userspace region and potentially corrupt the kernel, resulting in a denial of service condition.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.40% probability · 34th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel · fedoraproject/fedora · redhat/enterprise linux
- Source
- secalert@redhat.com
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2069793Exploit, Issue Tracking, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20230214-0003/Third Party Advisory
- https://www.openwall.com/lists/oss-security/2022/04/08/4Exploit, Mailing List, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2069793Exploit, Issue Tracking, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20230214-0003/Third Party Advisory
- https://www.openwall.com/lists/oss-security/2022/04/08/4Exploit, Mailing List, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.