CVSS: 6.5EPSS: 0%CPEs: 2EXPL: 0CVE-2021-3544
https://notcve.org/view.php?id=CVE-2021-3544
Several memory leaks were found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU in versions up to and including 6.0. They exist in contrib/vhost-user-gpu/vhost-user-gpu.c and contrib/vhost-user-gpu/virgl.c due to improper release of memory (i.e., free) after effective lifetime. Se han encontrado varias pérdidas de memoria en el dispositivo virtio vhost-user GPU (vhost-user-gpu) de QEMU en las versiones hasta la 6.0 incluyéndola. Se presentan en los archivos contrib/vhost-user-gpu/vhost-user-gpu.c y contrib/vhost-user-gpu/virgl.c debido a la liberación inapropiada de la memoria (es decir, libre) después del tiempo de vida efectivo • http://www.openwall.com/lists/oss-security/2021/05/31/1 https://bugzilla.redhat.com/show_bug.cgi?id=1958935 https://security.gentoo.org/glsa/202208-27 https://security.netapp.com/advisory/ntap-20210720-0008 https://www.debian.org/security/2021/dsa-4980 • CWE-401: Missing Release of Memory after Effective Lifetime •
CVSS: 6.0EPSS: 0%CPEs: 2EXPL: 0CVE-2020-35503
https://notcve.org/view.php?id=CVE-2020-35503
A NULL pointer dereference flaw was found in the megasas-gen2 SCSI host bus adapter emulation of QEMU in versions before and including 6.0. This issue occurs in the megasas_command_cancelled() callback function while dropping a SCSI request. This flaw allows a privileged guest user to crash the QEMU process 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 desreferencia del puntero NULL en la emulación megasas-gen2 SCSI host bus adapter de QEMU en versiones anteriores a 6.0 incluyéndola. • https://bugzilla.redhat.com/show_bug.cgi?id=1910346 https://security.netapp.com/advisory/ntap-20210720-0008 • CWE-476: NULL Pointer Dereference •
CVSS: 4.4EPSS: 0%CPEs: 4EXPL: 0CVE-2020-35505
https://notcve.org/view.php?id=CVE-2020-35505
A NULL pointer dereference flaw was found in the am53c974 SCSI host bus adapter emulation of QEMU in versions before 6.0.0. This issue occurs while handling the 'Information Transfer' command. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability. Se encontró un fallo de desreferencia del puntero NULL en la emulación del adaptador de bus de host SCSI am53c974 de QEMU en versiones anteriores a 6.0.0. • http://www.openwall.com/lists/oss-security/2021/04/16/3 https://bugzilla.redhat.com/show_bug.cgi?id=1909769 https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html https://security.gentoo.org/glsa/202208-27 https://security.netapp.com/advisory/ntap-20210713-0006 https://www.openwall.com/lists/oss-security/2021/04/16/3 • CWE-476: NULL Pointer Dereference •
CVSS: 5.5EPSS: 0%CPEs: 5EXPL: 0CVE-2021-3527
https://notcve.org/view.php?id=CVE-2021-3527
A flaw was found in the USB redirector device (usb-redir) of QEMU. Small USB packets are combined into a single, large transfer request, to reduce the overhead and improve performance. The combined size of the bulk transfer is used to dynamically allocate a variable length array (VLA) on the stack without proper validation. Since the total size is not bounded, a malicious guest could use this flaw to influence the array length and cause the QEMU process to perform an excessive allocation on the stack, resulting in a denial of service. Se encontró un fallo en el dispositivo redirector USB (usb-redir) de QEMU. • https://bugzilla.redhat.com/show_bug.cgi?id=1955695 https://gitlab.com/qemu-project/qemu/-/commit/05a40b172e4d691371534828078be47e7fff524c https://gitlab.com/qemu-project/qemu/-/commit/7ec54f9eb62b5d177e30eb8b1cad795a5f8d8986 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-20210708-0008 https://www.openwall.com/lists/oss-security/ • CWE-770: Allocation of Resources Without Limits or Throttling •
CVSS: 6.1EPSS: 0%CPEs: 4EXPL: 1CVE-2021-3507 – QEMU: fdc: heap buffer overflow in DMA read data transfers
https://notcve.org/view.php?id=CVE-2021-3507
A heap buffer overflow was found in the floppy disk emulator of QEMU up to 6.0.0 (including). It could occur in fdctrl_transfer_handler() in hw/block/fdc.c while processing DMA read data transfers from the floppy drive to the guest system. A privileged guest user could use this flaw to crash the QEMU process on the host resulting in DoS scenario, or potential information leakage from the host memory. Se encontró un desbordamiento del búfer de pila en el emulador de disquete de QEMU versiones hasta 6.0.0 (incluyéndola). Podría ocurrir en la función fdctrl_transfer_handler() en el archivo hw/block/fdc.c mientras son procesados transferencias de datos de lectura DMA desde la unidad de disquete al sistema invitado. • https://bugzilla.redhat.com/show_bug.cgi?id=1951118 https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html https://security.netapp.com/advisory/ntap-20210528-0005 https://access.redhat.com/security/cve/CVE-2021-3507 • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer CWE-787: Out-of-bounds Write •