It was discovered that QEMU did not properly manage the guest drivers when shared buffers are not allocated. A malicious guest driver could use this issue to cause QEMU to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS and Ubuntu 22.10. (CVE-2022-1050) It was discovered that QEMU did not properly check the size of the structure pointed to by the guest physical address pqxl. A malicious guest attacker could use this issue to cause QEMU to crash, resulting in a denial of service. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS and Ubuntu 22.10. (CVE-2022-4144) It was discovered that QEMU did not properly manage memory in the ACPI Error Record Serialization Table (ERST) device. A malicious guest attacker could use this issue to cause QEMU to crash, resulting in a denial of service. This issue only affected Ubuntu 22.10. (CVE-2022-4172) It was discovered that QEMU did not properly manage memory when DMA memory writes happen repeatedly in the lsi53c895a device. A malicious guest attacker could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2023-0330)
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