CVE-2026-80973— Linux kernel 安全漏洞
一分钟漏洞结论
影响对象
Linux Linux
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于ALSA 6fire驱动中的usb6fire_comm_receiver_handler函数未对设备提供的MIDI事件长度进行边界检查和校验，可能导致越界读取并将缓冲区后的数据泄露到用户空间。
可能的 ATT&CK 技术 1 AI
T1595 · Active Scanning影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | c6d43ba816d1cf1d125bfbfc938f2a28a87facf9< c9204bc2ed2010e2469dbe5fce598878a37efd04 |
affected |
c6d43ba816d1cf1d125bfbfc938f2a28a87facf9< 2c590d5e1b1595d5c8fa0b72d2897423ce9985ca |
affected | ||
c6d43ba816d1cf1d125bfbfc938f2a28a87facf9< 0c8a3c773823cf12abd39c480aed70e25c384630 |
affected | ||
c6d43ba816d1cf1d125bfbfc938f2a28a87facf9< 00e84a9ff2d43953ae261995cae94d46f4c307a6 |
affected | ||
c6d43ba816d1cf1d125bfbfc938f2a28a87facf9< 466e911bbbbb779bb06337e35a286e5ca7af16b3 |
affected | ||
c6d43ba816d1cf1d125bfbfc938f2a28a87facf9< 2a6f6fba3bd31d2e8c957fefa29156e35e5e75d5 |
affected | ||
c6d43ba816d1cf1d125bfbfc938f2a28a87facf9< 34816e2cfeabafb8eccf54687186ce25699e8363 |
affected | ||
c6d43ba816d1cf1d125bfbfc938f2a28a87facf9< a478893b59e36cfe7d77a76b352f2db55502e879 |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2026-80973 基础信息
漏洞信息
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Vulnerability Title
ALSA: 6fire: bound the MIDI event length from the device
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
ALSA: 6fire: bound the MIDI event length from the device
usb6fire_comm_receiver_handler() forwards a MIDI event using a length
byte the device supplies, with no bound and no check that the transfer
delivered that many bytes:
if (!urb->status) {
if (rt->receiver_buffer[0] == 0x10) /* midi in event */
if (midi_rt)
midi_rt->in_received(midi_rt,
rt->receiver_buffer + 2,
rt->receiver_buffer[1]);
}
receiver_buffer is a 64-byte kzalloc() buffer (COMM_RECEIVER_BUFSIZE), so
only 62 bytes follow the two-byte header. receiver_buffer[1] is a u8 the
device chooses, so a device that answers with 0x10 and a length of 0xFF
makes snd_rawmidi_receive() read 255 bytes starting two bytes into a
64-byte object. The bytes past the buffer are handed to userspace
through the rawmidi read path.
urb->actual_length is not consulted either, so a short transfer leaves
both the type byte and the length byte at their previous values and the
handler acts on stale data.
The receiver URB is submitted from usb6fire_comm_init() at probe, so the
read happens on plug with no user action; forwarding to userspace also
needs a MIDI input substream open, since usb6fire_midi_in_received()
only calls snd_rawmidi_receive() when rt->in is set.
KASAN on 7.2.0-rc5 (arm64), single packet from an emulated device:
BUG: KASAN: slab-out-of-bounds in snd_rawmidi_receive
Read of size 255 at addr ffff000009f64682 by task bash/183
__asan_memcpy
snd_rawmidi_receive
usb6fire_midi_in_received [snd_usb_6fire]
usb6fire_comm_receiver_handler [snd_usb_6fire]
Allocated by task 11:
usb6fire_comm_init [snd_usb_6fire]
usb6fire_chip_probe [snd_usb_6fire]
The buggy address is located 2 bytes inside of
allocated 64-byte region [ffff000009f64680, ffff000009f646c0)
Reject the event when the length exceeds the bytes that follow the
header, and require the transfer to have delivered the header plus that
many bytes. The receiver URB is submitted with a 64-byte
transfer_buffer_length, so a genuine device cannot deliver an event
longer than those 62 bytes and nothing valid is dropped.
Discovered by XBOW, triaged by Baul Lee <baul.lee@xbow.com>
来源: CVE Program / CVE List V5
CVSS Information
N/A
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Linux kernel是美国Linux基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于ALSA 6fire驱动中的usb6fire_comm_receiver_handler函数未对设备提供的MIDI事件长度进行边界检查和校验，可能导致越界读取并将缓冲区后的数据泄露到用户空间。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2026-80973 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-80973 补丁与修复 (6)
CVE-2026-80973 厂商安全公告 (1)
CVE-2026-80973 其他参考 (1)
同批安全公告 · Linux · 2026-09-11 · 共 431 条
| CVE-2026-89688 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89656 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89655 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89658 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89660 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89659 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89662 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89669 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89674 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89675 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89676 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89677 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89681 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89686 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89703 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89479 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89478 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89702 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89482 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-89708 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
显示前 20 条，共 431 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-80973
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