CVE-2026-3195

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.

QEMU is a FAST! processor emulator using dynamic translation to achieve good emulation speed.

Security Fix(es):

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.(CVE-2026-3195)

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.(CVE-2026-3196)

QEMU is a FAST! processor emulator using dynamic translation to achieve good emulation speed.

Security Fix(es):

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.(CVE-2026-3195)

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.(CVE-2026-3196)

QEMU is a FAST! processor emulator using dynamic translation to achieve good emulation speed.

Security Fix(es):

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.(CVE-2026-3195)

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.(CVE-2026-3196)

QEMU is a FAST! processor emulator using dynamic translation to achieve good emulation speed.

Security Fix(es):

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.(CVE-2026-3195)

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.(CVE-2026-3196)

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.

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.

This update for qemu fixes the following issues:

Update to version 10.0.9.

Security issues fixed:

• CVE-2026-3196: unbounded memory allocation and host denial-of-service via PCM_INFO requests sent from the guest (bsc#1259079).
• CVE-2026-3195: heap out-of-bounds write when reading input audio in the virtio-snd device input callback (bsc#1259080).
• CVE-2026-2243: heap out-of-bounds read and 12-byte information leak when processing specially crafted VMDK files with qemu-img (bsc#1258509).

Other updates and bugfixes:

• Version 10.0.9:

  • Full backport list: https://lore.kernel.org/qemu-devel/[email protected]/
  • hyperv/syndbg: check length returned by cpu_physical_memory_map()
  • fuse: Copy write buffer content before polling
  • target/loongarch: Avoid recursive PNX exception on CSR_BADI fetch
  • target/loongarch: Preserve PTE permission bits in LDPTE
  • hw/net/npcm_gmac: Catch accesses off the end of the register array
  • linux-user: fix TIOCGSID ioctl
  • tests/tcg/multiarch/test-mmap: Check mmaps beyond reserved_va
  • bsd-user: Deal with mmap where start > reserved_va
  • linux-user: Deal with mmap where start > reserved_va
  • hw/net/xilinx_ethlite: Check for oversized TX packets
  • virtio-gpu: Ensure BHs are invoked only from main-loop thread
  • block/nfs: Do not enter coroutine from CB
  • block: Never drop BLOCK_IO_ERROR with action=stop for rate limiting
  • block/throttle-groups: fix deadlock with iolimits and muliple iothreads
  • mirror: Fix missed dirty bitmap writes during startup
  • block/curl: fix concurrent completion handling
  • block/vmdk: fix OOB read in vmdk_read_extent()
  • hw/net/smc91c111: Don't allow negative-length packets
  • io: fix cleanup for websock I/O source data on cancellation
  • io: fix cleanup for TLS I/O source data on cancellation
  • io: separate freeing of tasks from marking them as complete
  • target/i386/hvf/x86_mmu: Fix compiler warning
  • hw/i386/vmmouse: Fix hypercall clobbers
  • tests/docker: upgrade most non-lcitool debian tests to debian 13
  • hw/9pfs: fix missing EOPNOTSUPP on Twstat and Trenameat for fs synth driver
  • hw/9pfs: fix data race in v9fs_mark_fids_unreclaim()

• Add support for AMD-Turn CPUs (jsc#PED-13174)

  • target/i386: Add support for EPYC-Turin model (jsc#PED-13174)
  • target/i386: Update EPYC-Genoa for Cache property, perfmon-v2, RAS and SVM feature bits (jsc#PED-13174)
  • target/i386: Add couple of feature bits in CPUID_Fn80000021_EAX (jsc#PED-13174)
  • target/i386: Update EPYC-Milan CPU model for Cache property, RAS, SVM feature bits (jsc#PED-13174)
  • target/i386: Update EPYC-Rome CPU model for Cache property, RAS, SVM feature bits (jsc#PED-13174)
  • target/i386: Update EPYC CPU model for Cache property, RAS, SVM feature bits (jsc#PED-13174)

This update for qemu fixes the following issues:

Update to version 10.0.9.

Security issues fixed:

• CVE-2026-3196: unbounded memory allocation and host denial-of-service via PCM_INFO requests sent from the guest (bsc#1259079).
• CVE-2026-3195: heap out-of-bounds write when reading input audio in the virtio-snd device input callback (bsc#1259080).
• CVE-2026-2243: heap out-of-bounds read and 12-byte information leak when processing specially crafted VMDK files with qemu-img (bsc#1258509).

Other updates and bugfixes:

• Version 10.0.9:

  • Full backport list: https://lore.kernel.org/qemu-devel/[email protected]/
  • hyperv/syndbg: check length returned by cpu_physical_memory_map()
  • fuse: Copy write buffer content before polling
  • target/loongarch: Avoid recursive PNX exception on CSR_BADI fetch
  • target/loongarch: Preserve PTE permission bits in LDPTE
  • hw/net/npcm_gmac: Catch accesses off the end of the register array
  • linux-user: fix TIOCGSID ioctl
  • tests/tcg/multiarch/test-mmap: Check mmaps beyond reserved_va
  • bsd-user: Deal with mmap where start > reserved_va
  • linux-user: Deal with mmap where start > reserved_va
  • hw/net/xilinx_ethlite: Check for oversized TX packets
  • virtio-gpu: Ensure BHs are invoked only from main-loop thread
  • block/nfs: Do not enter coroutine from CB
  • block: Never drop BLOCK_IO_ERROR with action=stop for rate limiting
  • block/throttle-groups: fix deadlock with iolimits and muliple iothreads
  • mirror: Fix missed dirty bitmap writes during startup
  • block/curl: fix concurrent completion handling
  • block/vmdk: fix OOB read in vmdk_read_extent()
  • hw/net/smc91c111: Don't allow negative-length packets
  • io: fix cleanup for websock I/O source data on cancellation
  • io: fix cleanup for TLS I/O source data on cancellation
  • io: separate freeing of tasks from marking them as complete
  • target/i386/hvf/x86_mmu: Fix compiler warning
  • hw/i386/vmmouse: Fix hypercall clobbers
  • tests/docker: upgrade most non-lcitool debian tests to debian 13
  • hw/9pfs: fix missing EOPNOTSUPP on Twstat and Trenameat for fs synth driver
  • hw/9pfs: fix data race in v9fs_mark_fids_unreclaim()

• Add support for AMD-Turn CPUs (jsc#PED-13174)

  • target/i386: Add support for EPYC-Turin model (jsc#PED-13174)
  • target/i386: Update EPYC-Genoa for Cache property, perfmon-v2, RAS and SVM feature bits (jsc#PED-13174)
  • target/i386: Add couple of feature bits in CPUID_Fn80000021_EAX (jsc#PED-13174)
  • target/i386: Update EPYC-Milan CPU model for Cache property, RAS, SVM feature bits (jsc#PED-13174)
  • target/i386: Update EPYC-Rome CPU model for Cache property, RAS, SVM feature bits (jsc#PED-13174)
  • target/i386: Update EPYC CPU model for Cache property, RAS, SVM feature bits (jsc#PED-13174)

This update for qemu fixes the following issues:

Update to version 10.0.9.

Security issues fixed:

• CVE-2026-3196: unbounded memory allocation and host denial-of-service via PCM_INFO requests sent from the guest (bsc#1259079).
• CVE-2026-3195: heap out-of-bounds write when reading input audio in the virtio-snd device input callback (bsc#1259080).
• CVE-2026-2243: heap out-of-bounds read and 12-byte information leak when processing specially crafted VMDK files with qemu-img (bsc#1258509).

Other updates and bugfixes:

• Version 10.0.9:

  • Full backport list: https://lore.kernel.org/qemu-devel/[email protected]/
  • hyperv/syndbg: check length returned by cpu_physical_memory_map()
  • fuse: Copy write buffer content before polling
  • target/loongarch: Avoid recursive PNX exception on CSR_BADI fetch
  • target/loongarch: Preserve PTE permission bits in LDPTE
  • hw/net/npcm_gmac: Catch accesses off the end of the register array
  • linux-user: fix TIOCGSID ioctl
  • tests/tcg/multiarch/test-mmap: Check mmaps beyond reserved_va
  • bsd-user: Deal with mmap where start > reserved_va
  • linux-user: Deal with mmap where start > reserved_va
  • hw/net/xilinx_ethlite: Check for oversized TX packets
  • virtio-gpu: Ensure BHs are invoked only from main-loop thread
  • block/nfs: Do not enter coroutine from CB
  • block: Never drop BLOCK_IO_ERROR with action=stop for rate limiting
  • block/throttle-groups: fix deadlock with iolimits and muliple iothreads
  • mirror: Fix missed dirty bitmap writes during startup
  • block/curl: fix concurrent completion handling
  • block/vmdk: fix OOB read in vmdk_read_extent()
  • hw/net/smc91c111: Don't allow negative-length packets
  • io: fix cleanup for websock I/O source data on cancellation
  • io: fix cleanup for TLS I/O source data on cancellation
  • io: separate freeing of tasks from marking them as complete
  • target/i386/hvf/x86_mmu: Fix compiler warning
  • hw/i386/vmmouse: Fix hypercall clobbers
  • tests/docker: upgrade most non-lcitool debian tests to debian 13
  • hw/9pfs: fix missing EOPNOTSUPP on Twstat and Trenameat for fs synth driver
  • hw/9pfs: fix data race in v9fs_mark_fids_unreclaim()

• Add support for AMD-Turn CPUs (jsc#PED-13174)

  • target/i386: Add support for EPYC-Turin model (jsc#PED-13174)
  • target/i386: Update EPYC-Genoa for Cache property, perfmon-v2, RAS and SVM feature bits (jsc#PED-13174)
  • target/i386: Add couple of feature bits in CPUID_Fn80000021_EAX (jsc#PED-13174)
  • target/i386: Update EPYC-Milan CPU model for Cache property, RAS, SVM feature bits (jsc#PED-13174)
  • target/i386: Update EPYC-Rome CPU model for Cache property, RAS, SVM feature bits (jsc#PED-13174)
  • target/i386: Update EPYC CPU model for Cache property, RAS, SVM feature bits (jsc#PED-13174)

This update for qemu fixes the following issues

• CVE-2025-14876: qemu-kvm: Unbounded allocation in virtio-crypto (bsc#1255400).
• CVE-2026-0665: out-of-bounds heap access can lead to a denial of service or potential memory corruption (bsc#1256484).
• CVE-2026-2243: incorrect bounds check leads to heap out-of-bounds read and a 12-byte information leak when processing specially crafted VMDK files (bsc#1258509).
• CVE-2026-3195: heap buffer overflow when reading input audio in the virtio-snd device input callback due to insufficient checks in virtio_snd_pcm_in_cb (bsc#1259080).
• CVE-2026-3196: integer overflow in the virtio-snd device via PCM_INFO requests from the guest leads to unbounded memory allocation and host denial-of-service (bsc#1259079).
• CVE-2026-3842: hyperv/syndbg: missing mapped-length guard after cpu_physical_memory_map causes host OOB write (bsc#1262089).

This update for qemu fixes the following issues

• CVE-2025-14876: qemu-kvm: Unbounded allocation in virtio-crypto (bsc#1255400).
• CVE-2026-0665: out-of-bounds heap access can lead to a denial of service or potential memory corruption (bsc#1256484).
• CVE-2026-2243: incorrect bounds check leads to heap out-of-bounds read and a 12-byte information leak when processing specially crafted VMDK files (bsc#1258509).
• CVE-2026-3195: heap buffer overflow when reading input audio in the virtio-snd device input callback due to insufficient checks in virtio_snd_pcm_in_cb (bsc#1259080).
• CVE-2026-3196: integer overflow in the virtio-snd device via PCM_INFO requests from the guest leads to unbounded memory allocation and host denial-of-service (bsc#1259079).
• CVE-2026-3842: hyperv/syndbg: missing mapped-length guard after cpu_physical_memory_map causes host OOB write (bsc#1262089).

This update for qemu fixes the following issues:

• CVE-2026-2243: incorrect bounds check leads to heap out-of-bounds read and a 12-byte information leak when processing specially crafted VMDK files (bsc#1258509).
• CVE-2026-3195: heap buffer overflow when reading input audio in the virtio-snd device input callback due to insufficient checks in virtio_snd_pcm_in_cb (bsc#1259080).
• CVE-2026-3196: integer overflow in the virtio-snd device via PCM_INFO requests from the guest leads to unbounded memory allocation and host denial-of-service (bsc#1259079).
• CVE-2026-3842: hyperv/syndbg: missing mapped-length guard after cpu_physical_memory_map causes host OOB write (bsc#1262089).

This update for qemu fixes the following issues:

• CVE-2025-14876: qemu-kvm: Unbounded allocation in virtio-crypto (bsc#1255400).
• CVE-2026-0665: out-of-bounds heap access can lead to a denial of service or potential memory corruption (bsc#1256484).
• CVE-2026-2243: incorrect bounds check leads to heap out-of-bounds read and a 12-byte information leak when processing specially crafted VMDK files (bsc#1258509).
• CVE-2026-3195: heap buffer overflow when reading input audio in the virtio-snd device input callback due to insufficient checks in virtio_snd_pcm_in_cb (bsc#1259080).
• CVE-2026-3196: integer overflow in the virtio-snd device via PCM_INFO requests from the guest leads to unbounded memory allocation and host denial-of-service (bsc#1259079).
• CVE-2026-3842: hyperv/syndbg: missing mapped-length guard after cpu_physical_memory_map causes host OOB write (bsc#1262089).