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Sicherheitslücken in qemu · Seite 3

In den letzten 30 Tagen veröffentlichte Sicherheitslücken für qemu: 14. Davon im KEV-Katalog: 0.

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Sicherheitslücken: 507

  1. CVE-2026-6426

    Mittel · CVSS 4.4EPSS 0,39%Korrektur verfügbar

    Qemu-kvm: vhost inflight migration vmstate integer type mismatch causes out-of-bounds access

    A type mismatch vulnerability was found in QEMU's vhost inflight migration VMState handling. The destination buffer size is stored as a uint64_t but read by the VMS_VBUFFER load path as a signed int32_t. On little-endian hosts, a crafted incoming migration state with bit 31 set causes the value to be interpreted as negative and then implicitly converted to a very large size_t, leading qemu_get_buffer() to copy migration-stream data beyond the bounds of the mmap-backed inflight region. This can result in a crash of the QEMU process or memory corruption. Exploitation requires control of the migration producer or write access to the migration c

    • Auf 1:11.1.2+ds-2 aktualisieren
    Veröffentlicht Aktualisiert
  2. CVE-2026-12080

    Hoch · CVSS 7.3EPSS 0,14%Korrektur verfügbar

    Qemu-kvm: qemu-guest-agent: local privilege escalation via symlink attack in guest-ssh-add-authorized-keys

    A flaw was found in the QEMU Guest Agent (qga). A local unprivileged user can exploit a vulnerability in the guest-ssh-add-authorized-keys command handler by manipulating symbolic links. This can occur either through a deterministic directory-symlink bypass or a Time-of-Check to Time-of-Use (TOCTOU) file-symlink race. Successful exploitation allows the attacker to gain ownership of arbitrary root-owned files or directories, leading to root access. This vulnerability requires an external management layer (e.g., libvirt) to trigger the affected code path.

    • Auf 1:11.1.2+ds-1 aktualisieren
    Veröffentlicht Aktualisiert
  3. CVE-2026-3842

    Hoch · CVSS 7.8EPSS 0,17%Korrektur verfügbar

    Qemu-kvm: hyperv/syndbg: missing mapped-length guard after cpu_physical_memory_map causes host oob write

    A flaw was found in QEMU. This vulnerability allows a local attacker within a guest virtual machine to write data beyond its allocated memory. This occurs when cpu_physical_memory_map() returns a shorter length than expected, leading to an out-of-bounds write. Successful exploitation could result in unauthorized access to guest memory or corruption of heap-allocated objects, potentially causing information disclosure, data integrity issues, or a denial of service.

    • Auf 1:10.2.2+ds-1 aktualisieren
    Veröffentlicht Aktualisiert
  4. CVE-2026-3195

    Hoch · CVSS 7.4EPSS 0,17%Korrektur verfügbar

    Qemu-kvm: virtio-snd: heap buffer overflow in virtio_snd_pcm_in_cb (incomplete fix for cve-2024-7730)

    A flaw was found in QEMU. When reading input audio in the virtio-snd device input callback, the `virtio_snd_pcm_in_cb` function did not check whether the iov could fit the data buffer, potentially leading to a heap out-of-bounds write. This issue exists due to an incomplete fix for CVE-2024-7730.

    • Auf 1:10.2.2+ds-1 aktualisieren
    Veröffentlicht Aktualisiert
  5. CVE-2026-3196

    Mittel · CVSS 5.5EPSS 0,14%Korrektur verfügbar

    Qemu-kvm: virtio-snd: integer overflow leading to unbounded memory allocation

    An integer overflow vulnerability was found in the virtio-snd device via PCM_INFO requests from the guest. A malicious guest can provide out-of-bounds stream counts, potentially leading to unbounded memory allocation on the host and a denial of service condition.

    • Auf 1:10.2.2+ds-1 aktualisieren
    Veröffentlicht Aktualisiert

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