CVSS: 8.2EPSS: 0%CPEs: 5EXPL: 1CVE-2021-4207 – QEMU: QXL: double fetch in qxl_cursor() can lead to heap buffer overflow
https://notcve.org/view.php?id=CVE-2021-4207
A flaw was found in the QXL display device emulation in QEMU. A double fetch of guest controlled values `cursor->header.width` and `cursor->header.height` can lead to the allocation of a small cursor object followed by a subsequent heap-based buffer overflow. A malicious privileged guest user could use this flaw to crash the QEMU process on the host or potentially execute arbitrary code within the context of the QEMU process. Se ha encontrado un fallo en la emulación del dispositivo de visualización QXL en QEMU. Una doble obtención de los valores controlados por el huésped "cursor-)header.width" y "cursor-)header.height" puede conllevar a una asignación de un pequeño objeto cursor seguido de un posterior desbordamiento del búfer en la región heap de la memoria. • https://bugzilla.redhat.com/show_bug.cgi?id=2036966 https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html https://security.gentoo.org/glsa/202208-27 https://starlabs.sg/advisories/21-4207 https://www.debian.org/security/2022/dsa-5133 https://access.redhat.com/security/cve/CVE-2021-4207 • CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') •
CVSS: 3.2EPSS: 0%CPEs: 3EXPL: 0CVE-2022-26354 – QEMU: vhost-vsock: missing virtqueue detach on error can lead to memory leak
https://notcve.org/view.php?id=CVE-2022-26354
A flaw was found in the vhost-vsock device of QEMU. In case of error, an invalid element was not detached from the virtqueue before freeing its memory, leading to memory leakage and other unexpected results. Affected QEMU versions <= 6.2.0. Se ha encontrado un fallo en el dispositivo vhost-vsock de QEMU. En caso de error, un elemento inválido no era desprendido de la virtqueue antes de liberar su memoria, conllevando a una pérdida de memoria y otros resultados no esperados. • https://gitlab.com/qemu-project/qemu/-/commit/8d1b247f3748ac4078524130c6d7ae42b6140aaf https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html https://security.gentoo.org/glsa/202208-27 https://security.netapp.com/advisory/ntap-20220425-0003 https://www.debian.org/security/2022/dsa-5133 https://access.redhat.com/security/cve/CVE-2022-26354 https://bugzilla.redhat.com/show_bug.cgi?id=2063257 • CWE-772: Missing Release of Resource after Effective Lifetime •
CVSS: 6.0EPSS: 0%CPEs: 2EXPL: 1CVE-2021-4158 – QEMU: NULL pointer dereference in pci_write() in hw/acpi/pcihp.c
https://notcve.org/view.php?id=CVE-2021-4158
A NULL pointer dereference issue was found in the ACPI code of QEMU. A malicious, privileged user within the guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition. Se ha encontrado un problema de desreferencia de puntero NULL en el código ACPI de QEMU. Un usuario malicioso y con privilegios dentro del huésped podía usar este fallo para bloquear el proceso de QEMU en el host, resultando en una situación de denegación de servicio. • https://access.redhat.com/security/cve/CVE-2021-4158 https://bugzilla.redhat.com/show_bug.cgi?id=2035002 https://gitlab.com/qemu-project/qemu/-/commit/9bd6565ccee68f72d5012e24646e12a1c662827e https://gitlab.com/qemu-project/qemu/-/issues/770 https://www.mail-archive.com/qemu-devel%40nongnu.org/msg857944.html • CWE-476: NULL Pointer Dereference •
CVSS: 7.8EPSS: 0%CPEs: 2EXPL: 0CVE-2022-0358 – QEMU: virtiofsd: potential privilege escalation via CVE-2018-13405
https://notcve.org/view.php?id=CVE-2022-0358
A flaw was found in the QEMU virtio-fs shared file system daemon (virtiofsd) implementation. This flaw is strictly related to CVE-2018-13405. A local guest user can create files in the directories shared by virtio-fs with unintended group ownership in a scenario where a directory is SGID to a certain group and is writable by a user who is not a member of the group. This could allow a malicious unprivileged user inside the guest to gain access to resources accessible to the root group, potentially escalating their privileges within the guest. A malicious local user in the host might also leverage this unexpected executable file created by the guest to escalate their privileges on the host system. • https://access.redhat.com/security/cve/CVE-2022-0358 https://bugzilla.redhat.com/show_bug.cgi?id=2044863 https://gitlab.com/qemu-project/qemu/-/commit/449e8171f96a6a944d1f3b7d3627ae059eae21ca https://security.netapp.com/advisory/ntap-20221007-0008 • CWE-273: Improper Check for Dropped Privileges •
CVSS: 6.0EPSS: 0%CPEs: 3EXPL: 0CVE-2021-3607
https://notcve.org/view.php?id=CVE-2021-3607
An integer overflow was found in the QEMU implementation of VMWare's paravirtual RDMA device in versions prior to 6.1.0. The issue occurs while handling a "PVRDMA_REG_DSRHIGH" write from the guest due to improper input validation. This flaw allows a privileged guest user to make QEMU allocate a large amount of memory, resulting in a denial of service. The highest threat from this vulnerability is to system availability. Se encontró un desbordamiento de enteros en la implementación de QEMU del dispositivo RDMA paravirtual de VMWare en versiones anteriores a 6.1.0. • https://bugzilla.redhat.com/show_bug.cgi?id=1973349 https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html https://lists.gnu.org/archive/html/qemu-devel/2021-06/msg07925.html https://security.gentoo.org/glsa/202208-27 https://security.netapp.com/advisory/ntap-20220318-0002 • CWE-190: Integer Overflow or Wraparound •