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CVE-2021-47229— 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PIO传输期间内核恐慌。

AI 预测 5.3 利用难度: 困难 EPSS 0.23% · P12

可能的 ATT&CK 技术 1 AI

T1499 · Endpoint Denial of Service

影响版本矩阵 14

厂商产品 版本范围状态
Linux Linux 8c39d710363c14ecb09219332869707395d1d495< 400e6b1860c8be61388d0b77814c53260f96e17a affected
8c39d710363c14ecb09219332869707395d1d495< b00a9aaa4be20ad6e3311fb78a485eae0899e89a affected
8c39d710363c14ecb09219332869707395d1d495< 4c90f90a91d75c3c73dd633827c90e8746d9f54d affected
8c39d710363c14ecb09219332869707395d1d495< 1a1dbc4473974867fe8c5f195c17b341c8e82867 affected
8c39d710363c14ecb09219332869707395d1d495< 3d213a4ddf49a860be6e795482c17f87e0c82b2a affected
8c39d710363c14ecb09219332869707395d1d495< f18139966d072dab8e4398c95ce955a9742e04f7 affected
4.8 affected
< 4.8 unaffected
… +6 条更多
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一、 漏洞 CVE-2021-47229 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
PCI: aardvark: Fix kernel panic during PIO transfer
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: PCI: aardvark: Fix kernel panic during PIO transfer Trying to start a new PIO transfer by writing value 0 in PIO_START register when previous transfer has not yet completed (which is indicated by value 1 in PIO_START) causes an External Abort on CPU, which results in kernel panic: SError Interrupt on CPU0, code 0xbf000002 -- SError Kernel panic - not syncing: Asynchronous SError Interrupt To prevent kernel panic, it is required to reject a new PIO transfer when previous one has not finished yet. If previous PIO transfer is not finished yet, the kernel may issue a new PIO request only if the previous PIO transfer timed out. In the past the root cause of this issue was incorrectly identified (as it often happens during link retraining or after link down event) and special hack was implemented in Trusted Firmware to catch all SError events in EL3, to ignore errors with code 0xbf000002 and not forwarding any other errors to kernel and instead throw panic from EL3 Trusted Firmware handler. Links to discussion and patches about this issue: https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git/commit/?id=3c7dcdac5c50 https://lore.kernel.org/linux-pci/20190316161243.29517-1-repk@triplefau.lt/ https://lore.kernel.org/linux-pci/971be151d24312cc533989a64bd454b4@www.loen.fr/ https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/1541 But the real cause was the fact that during link retraining or after link down event the PIO transfer may take longer time, up to the 1.44s until it times out. This increased probability that a new PIO transfer would be issued by kernel while previous one has not finished yet. After applying this change into the kernel, it is possible to revert the mentioned TF-A hack and SError events do not have to be caught in TF-A EL3.
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PIO传输期间内核恐慌。
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 8c39d710363c14ecb09219332869707395d1d495 ~ 400e6b1860c8be61388d0b77814c53260f96e17a -
Linux Linux 4.8 -

二、漏洞 CVE-2021-47229 的公开POC

# POC 描述 源链接 神龙链接
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三、漏洞 CVE-2021-47229 的情报信息

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CVE-2021-47229 其他参考 (6)

同批安全公告 · Linux · 2024-05-21 · 共 361 条

CVE-2023-52741 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2023-52755 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2021-47378 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2021-47427 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2023-52732 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2021-47232 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2021-47328 9.8 CRITICAL Linux kernel 安全漏洞
CVE-2023-52769 8.8 HIGH Linux kernel 安全漏洞
CVE-2023-52790 8.8 HIGH Linux kernel 安全漏洞
CVE-2021-47308 8.8 HIGH Linux kernel 安全漏洞
CVE-2021-47390 8.8 HIGH Linux kernel 安全漏洞
CVE-2023-52798 8.8 HIGH Linux kernel 安全漏洞
CVE-2021-47388 8.8 HIGH Linux kernel 安全漏洞
CVE-2023-52776 8.8 HIGH Linux kernel 安全漏洞
CVE-2023-52801 8.8 HIGH Linux kernel 安全漏洞
CVE-2023-52846 8.8 HIGH Linux kernel 安全漏洞
CVE-2021-47352 8.4 HIGH Linux kernel 安全漏洞
CVE-2023-52829 8.4 HIGH Linux kernel 安全漏洞
CVE-2021-47240 8.4 HIGH Linux kernel 安全漏洞
CVE-2021-47244 8.2 HIGH Linux kernel 安全漏洞

显示前 20 条，共 361 条。 查看全部 &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-47229

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