CVSS: 6.5EPSS: 0%CPEs: 3EXPL: 1CVE-2021-3638
https://notcve.org/view.php?id=CVE-2021-3638
An out-of-bounds memory access flaw was found in the ATI VGA device emulation of QEMU. This flaw occurs in the ati_2d_blt() routine while handling MMIO write operations when the guest provides invalid values for the destination display parameters. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service. Se ha encontrado un fallo de acceso a memoria fuera de límites en la emulación de dispositivos ATI VGA de QEMU. Este fallo es producido en la rutina ati_2d_blt() mientras son manejadas operaciones de escritura MMIO cuando el huésped proporciona valores no válidos para los parámetros de pantalla de destino. • https://bugzilla.redhat.com/show_bug.cgi?id=1979858 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GTVPHLLXJ65BUMFBUUZ35F3J632SLFRK https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7J5IRXJYLELW7D43A75LOWRUE5EU54O https://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg01682.html https://security.netapp.com/advisory/ntap-20220407-0003 https://ubuntu.com/security/CVE-2021-3638 • CWE-787: Out-of-bounds Write •
CVSS: 7.5EPSS: 0%CPEs: 9EXPL: 0CVE-2021-3748 – QEMU: virtio-net: heap use-after-free in virtio_net_receive_rcu
https://notcve.org/view.php?id=CVE-2021-3748
A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the descriptor's address belongs to the non direct access region, due to num_buffers being set after the virtqueue elem has been unmapped. A malicious guest could use this flaw to crash QEMU, resulting in a denial of service condition, or potentially execute code on the host with the privileges of the QEMU process. Se ha encontrado una vulnerabilidad de uso de memoria previamente liberada en el dispositivo virtio-net de QEMU. Podría ocurrir cuando la dirección del descriptor pertenece a la región de acceso no directo, debido a que num_buffers es establecido después de que el elemento virtqueue haya sido desmapeado. • https://bugzilla.redhat.com/show_bug.cgi?id=1998514 https://github.com/qemu/qemu/commit/bedd7e93d01961fcb16a97ae45d93acf357e11f6 https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html https://lists.nongnu.org/archive/html/qemu-devel/2021-09/msg00388.html https://security.gentoo.org/glsa/202208-27 https://security.netapp.com/advisory/ntap-20220425-0004 https://ubuntu.com/security/CVE-2021-3748 https://access. • CWE-416: Use After Free •
CVSS: 7.4EPSS: 0%CPEs: 4EXPL: 0CVE-2021-3713
https://notcve.org/view.php?id=CVE-2021-3713
An out-of-bounds write flaw was found in the UAS (USB Attached SCSI) device emulation of QEMU in versions prior to 6.2.0-rc0. The device uses the guest supplied stream number unchecked, which can lead to out-of-bounds access to the UASDevice->data3 and UASDevice->status3 fields. A malicious guest user could use this flaw to crash QEMU or potentially achieve code execution with the privileges of the QEMU process on the host. Se ha detectado un fallo de escritura fuera de límites en la emulación del dispositivo UAS (USB Attached SCSI) de QEMU en versiones anteriores a 6.2.0-rc0. El dispositivo usa el número de flujo suministrado por el huésped sin comprobar, lo que puede conllevar a un acceso fuera de límites a los campos UASDevice-)data3 y UASDevice-)status3. • https://bugzilla.redhat.com/show_bug.cgi?id=1994640 https://lists.debian.org/debian-lts-announce/2021/09/msg00000.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-20210923-0006 https://www.debian.org/security/2021/dsa-4980 • CWE-787: Out-of-bounds Write •
CVSS: 8.5EPSS: 0%CPEs: 7EXPL: 0CVE-2021-3682 – QEMU: usbredir: free() call on invalid pointer in bufp_alloc()
https://notcve.org/view.php?id=CVE-2021-3682
A flaw was found in the USB redirector device emulation of QEMU in versions prior to 6.1.0-rc2. It occurs when dropping packets during a bulk transfer from a SPICE client due to the packet queue being full. A malicious SPICE client could use this flaw to make QEMU call free() with faked heap chunk metadata, resulting in a crash of QEMU or potential code execution with the privileges of the QEMU process on the host. Se ha encontrado un fallo en la emulación del dispositivo redirector USB de QEMU en versiones anteriores a 6.1.0-rc2. Ocurre cuando se abandonan paquetes durante una transferencia masiva desde un cliente SPICE debido a que la queue de paquetes está lleno. • https://bugzilla.redhat.com/show_bug.cgi?id=1989651 https://lists.debian.org/debian-lts-announce/2021/09/msg00000.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-20210902-0006 https://www.debian.org/security/2021/dsa-4980 https://access.redhat.com/security/cve/CVE-2021-3682 • CWE-763: Release of Invalid Pointer or Reference •
CVSS: 6.5EPSS: 0%CPEs: 14EXPL: 0CVE-2021-20257 – QEMU: net: e1000: infinite loop while processing transmit descriptors
https://notcve.org/view.php?id=CVE-2021-20257
An infinite loop flaw was found in the e1000 NIC emulator of the QEMU. This issue occurs while processing transmits (tx) descriptors in process_tx_desc if various descriptor fields are initialized with invalid values. This flaw allows a guest to consume CPU cycles on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability. Se ha encontrado un fallo de bucle infinito en el emulador NIC e1000 de QEMU. • https://bugzilla.redhat.com/show_bug.cgi?id=1930087 https://github.com/qemu/qemu/commit/3de46e6fc489c52c9431a8a832ad8170a7569bd8 https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07428.html https://security.gentoo.org/glsa/202208-27 https://security.netapp.com/advisory/ntap-20220425-0003 https://www.openwall.com/lists/oss-security/2021/02/25/2 https://access.redhat.com/security/cve/CVE-2021-20257 • CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop') •