CVE-2025-38480— 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基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于insn_rw_emulate_bits函数中使用未初始化数据。
可能的 ATT&CK 技术 1 AI
T1190 · Exploit Public-Facing Application影响版本矩阵 18
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | ed9eccbe8970f6eedc1b978c157caf1251a896d4< 4c2981bf30401adfcdbfece4ab6f411f7c5875a1 |
affected |
ed9eccbe8970f6eedc1b978c157caf1251a896d4< 16256d7efcf7acc9f39abe21522c4c6b77f67c00 |
affected | ||
ed9eccbe8970f6eedc1b978c157caf1251a896d4< c53570e62b5b28bdb56bb563190227f8307817a5 |
affected | ||
ed9eccbe8970f6eedc1b978c157caf1251a896d4< 3050d197d6bc9ef128944a70210f42d2430b3000 |
affected | ||
ed9eccbe8970f6eedc1b978c157caf1251a896d4< 10f9024a8c824a41827fff1fefefb314c98e2c88 |
affected | ||
ed9eccbe8970f6eedc1b978c157caf1251a896d4< 2af1e7d389c2619219171d23f5b96dbcbb7f9656 |
affected | ||
ed9eccbe8970f6eedc1b978c157caf1251a896d4< 3ab55ffaaf75d0c7b68e332c1cdcc1b0e0044870 |
affected | ||
ed9eccbe8970f6eedc1b978c157caf1251a896d4< e9cb26291d009243a4478a7ffb37b3a9175bfce9 |
affected | ||
| … +10 条更多 | |||
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一、 漏洞 CVE-2025-38480 基础信息
漏洞信息
对漏洞内容有疑问？看看神龙的深度分析是否有帮助！
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Vulnerability Title
comedi: Fix use of uninitialized data in insn_rw_emulate_bits()
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
comedi: Fix use of uninitialized data in insn_rw_emulate_bits()
For Comedi `INSN_READ` and `INSN_WRITE` instructions on "digital"
subdevices (subdevice types `COMEDI_SUBD_DI`, `COMEDI_SUBD_DO`, and
`COMEDI_SUBD_DIO`), it is common for the subdevice driver not to have
`insn_read` and `insn_write` handler functions, but to have an
`insn_bits` handler function for handling Comedi `INSN_BITS`
instructions. In that case, the subdevice's `insn_read` and/or
`insn_write` function handler pointers are set to point to the
`insn_rw_emulate_bits()` function by `__comedi_device_postconfig()`.
For `INSN_WRITE`, `insn_rw_emulate_bits()` currently assumes that the
supplied `data[0]` value is a valid copy from user memory. It will at
least exist because `do_insnlist_ioctl()` and `do_insn_ioctl()` in
"comedi_fops.c" ensure at lease `MIN_SAMPLES` (16) elements are
allocated. However, if `insn->n` is 0 (which is allowable for
`INSN_READ` and `INSN_WRITE` instructions, then `data[0]` may contain
uninitialized data, and certainly contains invalid data, possibly from a
different instruction in the array of instructions handled by
`do_insnlist_ioctl()`. This will result in an incorrect value being
written to the digital output channel (or to the digital input/output
channel if configured as an output), and may be reflected in the
internal saved state of the channel.
Fix it by returning 0 early if `insn->n` is 0, before reaching the code
that accesses `data[0]`. Previously, the function always returned 1 on
success, but it is supposed to be the number of data samples actually
read or written up to `insn->n`, which is 0 in this case.
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基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于insn_rw_emulate_bits函数中使用未初始化数据。
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-2025-38480 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
AI 生成 POC
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未找到公开 POC。
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同批安全公告 · Linux · 2025-07-28 · 共 29 条
| CVE-2025-38490 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-38488 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-38471 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-38472 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-38476 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2025-38495 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38491 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38478 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38485 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38486 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38484 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38494 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38477 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38475 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38470 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2025-38493 | Linux kernel 安全漏洞 | |
| CVE-2025-38492 | Linux kernel 安全漏洞 | |
| CVE-2025-38497 | Linux kernel 安全漏洞 | |
| CVE-2025-38496 | Linux kernel 多款产品安全漏洞 | |
| CVE-2025-38468 | Linux kernel 安全漏洞 |
显示前 20 条，共 29 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2025-38480
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