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CVE-2023-4732— Kernel: race between task migrating pages and another task calling exit_mmap to release those same pages getting invalid opcode bug in include/linux/swapops.h

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 8
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存在竞争条件问题漏洞，该漏洞源于内存管理子系统中发现了一个缺陷，任务迁移页面与调用 exit_mmap 的另一个任务之间存在竞争，导致释放相同页面，在 include/linux/swapops.h 中获取无效操作码。

CVSS 4.7 · Medium EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2023-4732

Vulnerability Information
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Vulnerability Title
Kernel: race between task migrating pages and another task calling exit_mmap to release those same pages getting invalid opcode bug in include/linux/swapops.h
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in pfn_swap_entry_to_page in memory management subsystem in the Linux Kernel. In this flaw, an attacker with a local user privilege may cause a denial of service problem due to a BUG statement referencing pmd_t x.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
单线程内的竞争条件
Source: CVE Program / CVE List V5
Vulnerability Title
Linux Kernel 竞争条件问题漏洞
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存在竞争条件问题漏洞，该漏洞源于内存管理子系统中发现了一个缺陷，任务迁移页面与调用 exit_mmap 的另一个任务之间存在竞争，导致释放相同页面，在 include/linux/swapops.h 中获取无效操作码。
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
Red Hat Red Hat Enterprise Linux 8 0:4.18.0-513.5.1.rt7.307.el8_9 ~ * cpe:/a:redhat:enterprise_linux:8::realtime
Red Hat Red Hat Enterprise Linux 8 0:4.18.0-513.5.1.el8_9 ~ * cpe:/a:redhat:enterprise_linux:8::crb
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support 0:4.18.0-372.87.1.el8_6 ~ * cpe:/a:redhat:rhel_eus:8.6::crb
Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support 0:4.18.0-477.36.1.el8_8 ~ * cpe:/o:redhat:rhel_eus:8.8::baseos
Red Hat Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 0:4.18.0-372.87.1.el8_6 ~ * cpe:/a:redhat:rhel_eus:8.6::crb
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9

II. Public POCs for CVE-2023-4732

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III. Intelligence Information for CVE-2023-4732

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Vendor Advisories for CVE-2023-4732 (6)

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 8
Same vendor: Red Hat
Same weakness: CWE-366

V. Comments for CVE-2023-4732

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