Use After Free in Linux Kernel
CVE-2022-1158
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.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (32.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 32.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- Linux Kernel
- Fedoraproject Fedora — versions 36
- Red Hat Enterprise Linux — versions 8.0, 9.0
- Kernel — versions kernel 5.18
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.redhat.com/show_bug.cgi (Exploit, Third Party Advisory, Issue Tracking)
- www.openwall.com/lists/oss-security/2022/04/08/4 (Exploit, Mailing List, Third Party Advisory)
- security.netapp.com/advisory/ntap-20230214-0003/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2022-1158?
- CVE-2022-1158 is a high-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 7.8/10. Published 2022-08-05.
- How severe is CVE-2022-1158?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2022-1158 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.