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Search Results (20 CVEs found)
| CVE | Vendors | Products | Updated | CVSS v3.1 |
|---|---|---|---|---|
| CVE-2026-51082 | 2 Proxmox, Qemu | 3 Pve-container, Pve-manager, Qemu | 2026-07-31 | 7.2 High |
| A race condition between the vncproxy and vncwebsocket API calls in Proxmox Virtual Environment (PVE) 9.x pve-manager before 9.1.9 and 8.x before 8.4.19; qemu-server 9.x before 9.1.7 and 8.x before 8.4.7; and pve-container before 6.1.3 (PVE 9.x) and before 5.3.4 (PVE 8.x) allows an attacker with privileges to call "vncproxy" to hijack a VNC session that is established in parallel by a different user for a different VM. | ||||
| CVE-2008-4539 | 4 Canonical, Debian, Kvm Qumranet and 1 more | 4 Ubuntu Linux, Debian Linux, Kvm and 1 more | 2026-04-23 | N/A |
| Heap-based buffer overflow in the Cirrus VGA implementation in (1) KVM before kvm-82 and (2) QEMU on Debian GNU/Linux and Ubuntu might allow local users to gain privileges by using the VNC console for a connection, aka the LGD-54XX "bitblt" heap overflow. NOTE: this issue exists because of an incorrect fix for CVE-2007-1320. | ||||
| CVE-2009-3616 | 2 Qemu, Redhat | 3 Qemu, Enterprise Linux Server, Enterprise Linux Workstation | 2026-04-23 | 9.9 Critical |
| Multiple use-after-free vulnerabilities in vnc.c in the VNC server in QEMU 0.10.6 and earlier might allow guest OS users to execute arbitrary code on the host OS by establishing a connection from a VNC client and then (1) disconnecting during data transfer, (2) sending a message using incorrect integer data types, or (3) using the Fuzzy Screen Mode protocol, related to double free vulnerabilities. | ||||
| CVE-2008-5714 | 1 Qemu | 1 Qemu | 2026-04-23 | N/A |
| Off-by-one error in monitor.c in Qemu 0.9.1 might make it easier for remote attackers to guess the VNC password, which is limited to seven characters where eight was intended. | ||||
| CVE-2008-2382 | 2 Kvm Qumranet, Qemu | 2 Kvm, Qemu | 2026-04-23 | N/A |
| The protocol_client_msg function in vnc.c in the VNC server in (1) Qemu 0.9.1 and earlier and (2) KVM kvm-79 and earlier allows remote attackers to cause a denial of service (infinite loop) via a certain message. | ||||
| CVE-2023-6683 | 2 Qemu, Redhat | 3 Qemu, Advanced Virtualization, Enterprise Linux | 2026-02-25 | 6.5 Medium |
| A flaw was found in the QEMU built-in VNC server while processing ClientCutText messages. The qemu_clipboard_request() function can be reached before vnc_server_cut_text_caps() was called and had the chance to initialize the clipboard peer, leading to a NULL pointer dereference. This could allow a malicious authenticated VNC client to crash QEMU and trigger a denial of service. | ||||
| CVE-2023-3255 | 3 Fedoraproject, Qemu, Redhat | 4 Fedora, Qemu, Advanced Virtualization and 1 more | 2025-11-08 | 6.5 Medium |
| A flaw was found in the QEMU built-in VNC server while processing ClientCutText messages. A wrong exit condition may lead to an infinite loop when inflating an attacker controlled zlib buffer in the `inflate_buffer` function. This could allow a remote authenticated client who is able to send a clipboard to the VNC server to trigger a denial of service. | ||||
| CVE-2022-3165 | 3 Fedoraproject, Qemu, Redhat | 3 Fedora, Qemu, Enterprise Linux | 2025-05-14 | 6.5 Medium |
| An integer underflow issue was found in the QEMU VNC server while processing ClientCutText messages in the extended format. A malicious client could use this flaw to make QEMU unresponsive by sending a specially crafted payload message, resulting in a denial of service. | ||||
| CVE-2017-7980 | 4 Canonical, Debian, Qemu and 1 more | 12 Ubuntu Linux, Debian Linux, Qemu and 9 more | 2025-04-20 | N/A |
| Heap-based buffer overflow in Cirrus CLGD 54xx VGA Emulator in Quick Emulator (Qemu) 2.8 and earlier allows local guest OS users to execute arbitrary code or cause a denial of service (crash) via vectors related to a VNC client updating its display after a VGA operation. | ||||
| CVE-2015-8504 | 2 Debian, Qemu | 2 Debian Linux, Qemu | 2025-04-20 | 6.5 Medium |
| Qemu, when built with VNC display driver support, allows remote attackers to cause a denial of service (arithmetic exception and application crash) via crafted SetPixelFormat messages from a client. | ||||
| CVE-2014-7815 | 5 Canonical, Debian, Qemu and 2 more | 12 Ubuntu Linux, Debian Linux, Qemu and 9 more | 2025-04-12 | N/A |
| The set_pixel_format function in ui/vnc.c in QEMU allows remote attackers to cause a denial of service (crash) via a small bytes_per_pixel value. | ||||
| CVE-2015-1779 | 6 Canonical, Debian, Fedoraproject and 3 more | 12 Ubuntu Linux, Debian Linux, Fedora and 9 more | 2025-04-12 | 8.6 High |
| The VNC websocket frame decoder in QEMU allows remote attackers to cause a denial of service (memory and CPU consumption) via a large (1) websocket payload or (2) HTTP headers section. | ||||
| CVE-2015-5225 | 3 Fedoraproject, Qemu, Redhat | 4 Fedora, Qemu, Enterprise Linux and 1 more | 2025-04-12 | N/A |
| Buffer overflow in the vnc_refresh_server_surface function in the VNC display driver in QEMU before 2.4.0.1 allows guest users to cause a denial of service (heap memory corruption and process crash) or possibly execute arbitrary code on the host via unspecified vectors, related to refreshing the server display surface. | ||||
| CVE-2011-0011 | 2 Qemu, Redhat | 2 Qemu, Enterprise Linux | 2025-04-11 | N/A |
| qemu-kvm before 0.11.0 disables VNC authentication when the password is cleared, which allows remote attackers to bypass authentication and establish VNC sessions. | ||||
| CVE-2023-3354 | 3 Fedoraproject, Qemu, Redhat | 10 Fedora, Qemu, Advanced Virtualization and 7 more | 2025-02-13 | 7.5 High |
| A flaw was found in the QEMU built-in VNC server. When a client connects to the VNC server, QEMU checks whether the current number of connections crosses a certain threshold and if so, cleans up the previous connection. If the previous connection happens to be in the handshake phase and fails, QEMU cleans up the connection again, resulting in a NULL pointer dereference issue. This could allow a remote unauthenticated client to cause a denial of service. | ||||
| CVE-2019-20382 | 5 Canonical, Debian, Opensuse and 2 more | 7 Ubuntu Linux, Debian Linux, Leap and 4 more | 2024-11-21 | 3.5 Low |
| QEMU 4.1.0 has a memory leak in zrle_compress_data in ui/vnc-enc-zrle.c during a VNC disconnect operation because libz is misused, resulting in a situation where memory allocated in deflateInit2 is not freed in deflateEnd. | ||||
| CVE-2017-2633 | 2 Qemu, Redhat | 8 Qemu, Enterprise Linux, Enterprise Linux Desktop and 5 more | 2024-11-21 | N/A |
| An out-of-bounds memory access issue was found in Quick Emulator (QEMU) before 1.7.2 in the VNC display driver. This flaw could occur while refreshing the VNC display surface area in the 'vnc_refresh_server_surface'. A user inside a guest could use this flaw to crash the QEMU process. | ||||
| CVE-2017-15124 | 2 Qemu, Redhat | 3 Qemu, Enterprise Linux, Openstack | 2024-11-21 | N/A |
| VNC server implementation in Quick Emulator (QEMU) 2.11.0 and older was found to be vulnerable to an unbounded memory allocation issue, as it did not throttle the framebuffer updates sent to its client. If the client did not consume these updates, VNC server allocates growing memory to hold onto this data. A malicious remote VNC client could use this flaw to cause DoS to the server host. | ||||
| CVE-2016-9603 | 4 Citrix, Debian, Qemu and 1 more | 10 Xenserver, Debian Linux, Qemu and 7 more | 2024-11-21 | N/A |
| A heap buffer overflow flaw was found in QEMU's Cirrus CLGD 54xx VGA emulator's VNC display driver support before 2.9; the issue could occur when a VNC client attempted to update its display after a VGA operation is performed by a guest. A privileged user/process inside a guest could use this flaw to crash the QEMU process or, potentially, execute arbitrary code on the host with privileges of the QEMU process. | ||||
| CVE-2015-5239 | 5 Arista, Canonical, Fedoraproject and 2 more | 8 Eos, Ubuntu Linux, Fedora and 5 more | 2024-11-21 | 6.5 Medium |
| Integer overflow in the VNC display driver in QEMU before 2.1.0 allows attachers to cause a denial of service (process crash) via a CLIENT_CUT_TEXT message, which triggers an infinite loop. | ||||
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