NS-SA-2025-0072

简介

important: libxml2/qemu security update

严重级别

important

主题

An update for libxml2/qemu is now available for NewStart CGSL MAIN 7.02.
NewStart Security has rated this update as having a security impact of important. A Common Vunlnerability Scoring System(CVSS)base score, which gives a detailed severity rating, is available for each vulnerability from the CVElink(s) in the References section.

详细描述

libxml2:
qemu:


Security Fix(es):
libxml2: A flaw was found in libxml2. This vulnerability allows a NULL pointer dereference, leading to a potential crash or denial of service via a crafted XML pattern.(CVE-2025-27113)
libxml2: bugfix
qemu: 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-2023-6683)
qemu: A stack based buffer overflow was found in the virtio-net device of QEMU. This issue occurs when flushing TX in the virtio_net_flush_tx function if guest features VIRTIO_NET_F_HASH_REPORT, VIRTIO_F_VERSION_1 and VIRTIO_NET_F_MRG_RXBUF are enabled. This could allow a malicious user to overwrite local variables allocated on the stack. Specifically, the `out_sg` variable could be used to read a part of process memory and send it to the wire, causing an information leak.(CVE-2023-6693)
qemu: A double free vulnerability was found in QEMU virtio devices (virtio-gpu, virtio-serial-bus, virtio-crypto), where the mem_reentrancy_guard flag insufficiently protects against DMA reentrancy issues. This issue could allow a malicious privileged guest user to crash the QEMU process on the host, resulting in a denial of service or allow arbitrary code execution within the context of the QEMU process on the host.(CVE-2024-3446)
qemu: A heap buffer overflow was found in the virtio-snd device in QEMU. When reading input audio in the virtio-snd input callback, virtio_snd_pcm_in_cb, the function did not check whether the iov can fit the data buffer. This issue can trigger an out-of-bounds write if the size of the virtio queue element is equal to virtio_snd_pcm_status, which makes the available space for audio data zero.(CVE-2024-7730)
qemu: bugfix


Solution:
For details on how to apply this update, which includes the changes described in this advisory, refer to:
http://security.gd-linux.com/how_to_apply_patch.html
Remember the build tag is 7.02.02B7.

影响组件

• libxml2
• qemu

影响产品

• CGSL MAIN 7.02

更新包

CVE

• CVE-2025-27113
• CVE-2023-6683
• CVE-2023-6693
• CVE-2024-3446
• CVE-2024-7730

参考

• https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2025-27113
• https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-6683
• https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-6693
• https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-3446
• https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-7730