Vulnerability Details : CVE-2022-1263
A NULL pointer dereference issue was found in KVM when releasing a vCPU with dirty ring support enabled. This flaw allows an unprivileged local attacker on the host to issue specific ioctl calls, causing a kernel oops condition that results in a denial of service.
Vulnerability category: Memory CorruptionDenial of service
Products affected by CVE-2022-1263
- cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.18:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.18:rc2:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2022-1263
0.04%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 6 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2022-1263
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
NIST |
CWE ids for CVE-2022-1263
-
The product dereferences a pointer that it expects to be valid but is NULL.Assigned by:
- nvd@nist.gov (Primary)
- secalert@redhat.com (Secondary)
References for CVE-2022-1263
-
https://bugzilla.redhat.com/show_bug.cgi?id=2072698
2072698 – (CVE-2022-1263) CVE-2022-1263 kernel: Null pointer dereference in kvm_dirty_ring_push in virt/kvm/dirty_ring.cIssue Tracking;Patch;Third Party Advisory
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https://access.redhat.com/security/cve/CVE-2022-1263
CVE-2022-1263- Red Hat Customer PortalThird Party Advisory
-
https://www.openwall.com/lists/oss-security/2022/04/07/1
oss-security - Linux kernel: x86/kvm: null-ptr-deref in kvm_dirty_ring_pushExploit;Mailing List;Third Party Advisory
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https://github.com/torvalds/linux/commit/5593473a1e6c743764b08e3b6071cb43b5cfa6c4
KVM: avoid NULL pointer dereference in kvm_dirty_ring_push · torvalds/linux@5593473 · GitHubPatch;Third Party Advisory
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