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CVE-2024-50193— x86/entry_32: Clear CPU buffers after register restore in NMI return

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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，该漏洞源于在NMI返回时CPU缓冲区清除不当。

AI Predicted 7.5 Difficulty: Hard EPSS 0.21% · P11

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux 50f021f0b985629accf10481a6e89af8b9700583< 6f44a5fc15b5cece0785bc07453db77d99b0a6de affected
d54de9f2a127090f2017184e8257795b487d5312< b6400eb0b347821efc57760221f8fb6d63b9548a affected
2e3087505ddb8ba2d3d4c81306cca11e868fcdb9< 43778de19d2ef129636815274644b9c16e78c66b affected
ca13d8cd8dac25558da4ee8df4dc70e8e7f9d762< 227358e89703c344008119be7e8ffa3fdb5b92de affected
a0e2dab44d22b913b4c228c8b52b2a104434b0b3< 64adf22c4bc73ede920baca5defefb70f190cdbc affected
a0e2dab44d22b913b4c228c8b52b2a104434b0b3< 48a2440d0f20c826b884e04377ccc1e4696c84e9 affected
51eca9f1fd047b500137d021f882d93f03280118 affected
5.10.215< 5.10.228 affected
… +12 more rows
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I. Basic Information for CVE-2024-50193

Vulnerability Information
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Vulnerability Title
x86/entry_32: Clear CPU buffers after register restore in NMI return
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: x86/entry_32: Clear CPU buffers after register restore in NMI return CPU buffers are currently cleared after call to exc_nmi, but before register state is restored. This may be okay for MDS mitigation but not for RDFS. Because RDFS mitigation requires CPU buffers to be cleared when registers don't have any sensitive data. Move CLEAR_CPU_BUFFERS after RESTORE_ALL_NMI.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
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，该漏洞源于在NMI返回时CPU缓冲区清除不当。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 50f021f0b985629accf10481a6e89af8b9700583 ~ 6f44a5fc15b5cece0785bc07453db77d99b0a6de -
Linux Linux 6.8 -

II. Public POCs for CVE-2024-50193

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III. Intelligence Information for CVE-2024-50193

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Patches & Fixes for CVE-2024-50193 (4)

Same Patch Batch · Linux · 2024-11-08 · 38 CVEs total

CVE-2024-50206 9.8 CRITICAL net: ethernet: mtk_eth_soc: fix memory corruption during fq dma init
CVE-2024-50185 8.2 HIGH mptcp: handle consistently DSS corruption
CVE-2024-50174 7.8 HIGH drm/panthor: Fix race when converting group handle to group object
CVE-2024-50211 7.8 HIGH udf: refactor inode_bmap() to handle error
CVE-2024-50208 7.8 HIGH RDMA/bnxt_re: Fix a bug while setting up Level-2 PBL pages
CVE-2024-50207 7.8 HIGH ring-buffer: Fix reader locking when changing the sub buffer order
CVE-2024-50203 7.8 HIGH bpf, arm64: Fix address emission with tag-based KASAN enabled
CVE-2024-50200 7.8 HIGH maple_tree: correct tree corruption on spanning store
CVE-2024-50189 7.8 HIGH HID: amd_sfh: Switch to device-managed dmam_alloc_coherent()
CVE-2024-50188 7.8 HIGH net: phy: dp83869: fix memory corruption when enabling fiber
CVE-2024-50187 7.8 HIGH drm/vc4: Stop the active perfmon before being destroyed
CVE-2024-50186 7.8 HIGH net: explicitly clear the sk pointer, when pf->create fails
CVE-2024-50173 7.8 HIGH drm/panthor: Fix access to uninitialized variable in tick_ctx_cleanup()
CVE-2024-50175 7.8 HIGH media: qcom: camss: Remove use_count guard in stop_streaming
CVE-2024-50182 7.1 HIGH secretmem: disable memfd_secret() if arch cannot set direct map
CVE-2024-50195 7.1 HIGH posix-clock: Fix missing timespec64 check in pc_clock_settime()
CVE-2024-50199 mm/swapfile: skip HugeTLB pages for unuse_vma
CVE-2024-50210 posix-clock: posix-clock: Fix unbalanced locking in pc_clock_settime()
CVE-2024-50176 remoteproc: k3-r5: Fix error handling when power-up failed
CVE-2024-50209 RDMA/bnxt_re: Add a check for memory allocation

Showing top 20 of 38 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-50193

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