CVE-2026-23467— 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intel_dmc_update_dc6_allowed_count函数缺少空指针检查，可能导致内核崩溃。
可能的 ATT&CK 技术 1 AI
T1059 · Command and Scripting Interpreter影响版本矩阵 8
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 88c1f9a4d36de61f87cc52aac670020b13d1ccaa< 0b35d11fbbcfd1079c8489282a341944228835e3 |
affected |
88c1f9a4d36de61f87cc52aac670020b13d1ccaa< 631317825d44283abfe7a8374f13a76ce2032bb8 |
affected | ||
88c1f9a4d36de61f87cc52aac670020b13d1ccaa< ac57eb3b7d2ad649025b5a0fa207315f755ac4f6 |
affected | ||
6.16 |
affected | ||
< 6.16 |
unaffected | ||
6.18.20≤ 6.18.* |
unaffected | ||
6.19.10≤ 6.19.* |
unaffected | ||
7.0≤ * |
unaffected |
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一、 漏洞 CVE-2026-23467 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
drm/i915/dmc: Fix an unlikely NULL pointer deference at probe
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
drm/i915/dmc: Fix an unlikely NULL pointer deference at probe
intel_dmc_update_dc6_allowed_count() oopses when DMC hasn't been
initialized, and dmc is thus NULL.
That would be the case when the call path is
intel_power_domains_init_hw() -> {skl,bxt,icl}_display_core_init() ->
gen9_set_dc_state() -> intel_dmc_update_dc6_allowed_count(), as
intel_power_domains_init_hw() is called *before* intel_dmc_init().
However, gen9_set_dc_state() calls intel_dmc_update_dc6_allowed_count()
conditionally, depending on the current and target DC states. At probe,
the target is disabled, but if DC6 is enabled, the function is called,
and an oops follows. Apparently it's quite unlikely that DC6 is enabled
at probe, as we haven't seen this failure mode before.
It is also strange to have DC6 enabled at boot, since that would require
the DMC firmware (loaded by BIOS); the BIOS loading the DMC firmware and
the driver stopping / reprogramming the firmware is a poorly specified
sequence and as such unlikely an intentional BIOS behaviour. It's more
likely that BIOS is leaving an unintentionally enabled DC6 HW state
behind (without actually loading the required DMC firmware for this).
The tracking of the DC6 allowed counter only works if starting /
stopping the counter depends on the _SW_ DC6 state vs. the current _HW_
DC6 state (since stopping the counter requires the DC5 counter captured
when the counter was started). Thus, using the HW DC6 state is incorrect
and it also leads to the above oops. Fix both issues by using the SW DC6
state for the tracking.
This is v2 of the fix originally sent by Jani, updated based on the
first Link: discussion below.
(cherry picked from commit 2344b93af8eb5da5d496b4e0529d35f0f559eaf0)
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intel_dmc_update_dc6_allowed_count函数缺少空指针检查，可能导致内核崩溃。
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-2026-23467 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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同批安全公告 · Linux · 2026-04-03 · 共 71 条
| CVE-2026-31402 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-23450 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-23427 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-23428 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-23455 | 9.1 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-23461 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23425 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23462 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23457 | 8.6 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23459 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23456 | 8.2 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-31393 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-31392 | 8.1 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-31398 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23432 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23437 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23458 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23444 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23445 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-23449 | 7.8 HIGH | Linux kernel 安全漏洞 |
显示前 20 条，共 71 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-23467
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