Home/CVE/A NULL pointer dereference issue was found in KVM when releasing a vCPU with dirty ring support enabled. This flaw allow
CVE

CVE-2022-1263

A NULL pointer dereference issue was found in KVM when releasing a vCPU with dirty ring support enabled. This flaw allow

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.

MEDIUM · CVSS 5.5 EPSS 0.00068
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-476NULL Pointer Dereference
CWE-476NULL Pointer Dereference
▤

Affected Products & Versions

3
linux kernel< 5.18
linux kernelall versions
redhat enterprise linuxall versions
▣

Scoring & Timeline

5.5
MEDIUM · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD31 Aug 2022 · 04:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

9
rhsaRHSA-2022:8267Low
rhsaRHSA-2022:7683Moderate
rhsaRHSA-2022:7933Low
rhsaRHSA-2022:7444Moderate
suse-csafSUSE-SU-2022:4617-1
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://access.redhat.com/security/cve/CVE-2022-1263Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2072698Issue TrackingPatchThird Party Advisory
https://github.com/torvalds/linux/commit/5593473a1e6c743764b08e3b6071cb43b5cfa6c4PatchThird Party Advisory
https://www.openwall.com/lists/oss-security/2022/04/07/1ExploitMailing ListThird Party Advisory
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