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CVE-2024-26909— 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，该漏洞源于内存释放后重用。

CVSS 7.0 · High EPSS 0.25% · P15

影响版本矩阵 8

厂商产品 版本范围状态
Linux Linux 080b4e24852b1d5b66929f69344e6c3eeb963941< 2bbd65c6ca567ed8dbbfc4fb945f57ce64bef342 affected
080b4e24852b1d5b66929f69344e6c3eeb963941< ef45aa2841e15b649e5417fe3d4de395fe462781 affected
080b4e24852b1d5b66929f69344e6c3eeb963941< b979f2d50a099f3402418d7ff5f26c3952fb08bb affected
6.3 affected
< 6.3 unaffected
6.6.23≤ 6.6.* unaffected
6.7.11≤ 6.7.* unaffected
6.8≤ * unaffected
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一、 漏洞 CVE-2024-26909 基础信息

漏洞信息
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Vulnerability Title
soc: qcom: pmic_glink_altmode: fix drm bridge use-after-free
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: soc: qcom: pmic_glink_altmode: fix drm bridge use-after-free A recent DRM series purporting to simplify support for "transparent bridges" and handling of probe deferrals ironically exposed a use-after-free issue on pmic_glink_altmode probe deferral. This has manifested itself as the display subsystem occasionally failing to initialise and NULL-pointer dereferences during boot of machines like the Lenovo ThinkPad X13s. Specifically, the dp-hpd bridge is currently registered before all resources have been acquired which means that it can also be deregistered on probe deferrals. In the meantime there is a race window where the new aux bridge driver (or PHY driver previously) may have looked up the dp-hpd bridge and stored a (non-reference-counted) pointer to the bridge which is about to be deallocated. When the display controller is later initialised, this triggers a use-after-free when attaching the bridges: dp -> aux -> dp-hpd (freed) which may, for example, result in the freed bridge failing to attach: [drm:drm_bridge_attach [drm]] *ERROR* failed to attach bridge /soc@0/phy@88eb000 to encoder TMDS-31: -16 or a NULL-pointer dereference: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 ... Call trace: drm_bridge_attach+0x70/0x1a8 [drm] drm_aux_bridge_attach+0x24/0x38 [aux_bridge] drm_bridge_attach+0x80/0x1a8 [drm] dp_bridge_init+0xa8/0x15c [msm] msm_dp_modeset_init+0x28/0xc4 [msm] The DRM bridge implementation is clearly fragile and implicitly built on the assumption that bridges may never go away. In this case, the fix is to move the bridge registration in the pmic_glink_altmode driver to after all resources have been looked up. Incidentally, with the new dp-hpd bridge implementation, which registers child devices, this is also a requirement due to a long-standing issue in driver core that can otherwise lead to a probe deferral loop (see commit fbc35b45f9f6 ("Add documentation on meaning of -EPROBE_DEFER")). [DB: slightly fixed commit message by adding the word 'commit']
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
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，该漏洞源于内存释放后重用。
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

厂商 产品 影响版本 CPE 订阅
Linux Linux 080b4e24852b1d5b66929f69344e6c3eeb963941 ~ 2bbd65c6ca567ed8dbbfc4fb945f57ce64bef342 -
Linux Linux 6.3 -

二、漏洞 CVE-2024-26909 的公开POC

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三、漏洞 CVE-2024-26909 的情报信息

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CVE-2024-26909 其他参考 (2)

同批安全公告 · Linux · 2024-04-17 · 共 100 条

CVE-2024-26877 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2024-26853 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2024-26828 9.4 CRITICAL Linux kernel 安全漏洞
CVE-2024-26856 8.8 HIGH Linux kernel 安全漏洞
CVE-2024-26822 8.7 HIGH Linux kernel 安全漏洞
CVE-2024-26830 8.4 HIGH Linux kernel 安全漏洞
CVE-2024-26890 7.8 HIGH Linux kernel 安全漏洞
CVE-2024-26852 7.8 HIGH Linux kernel 安全漏洞
CVE-2024-26898 7.8 HIGH Linux kernel 安全漏洞
CVE-2024-26895 7.8 HIGH Linux kernel 安全漏洞
CVE-2024-26880 7.8 HIGH Linux kernel 安全漏洞
CVE-2024-26864 7.8 HIGH Linux kernel 安全漏洞
CVE-2024-26865 7.8 HIGH Linux kernel 安全漏洞
CVE-2024-26869 7.8 HIGH Linux kernel 安全漏洞
CVE-2024-26870 7.8 HIGH Linux kernel 安全漏洞
CVE-2024-26838 7.8 HIGH Linux kernel 安全漏洞
CVE-2024-26885 7.8 HIGH Linux kernel 安全漏洞
CVE-2024-26824 7.8 HIGH Linux kernel 安全漏洞
CVE-2024-26911 7.8 HIGH Linux kernel 安全漏洞
CVE-2024-26883 7.8 HIGH Linux kernel 安全漏洞

显示前 20 条，共 100 条。 查看全部 &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-26909

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