CVE-2023-52932: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: mm/swapfile: add cond_resched() in get_swap_pages() The softlockup still occurs in get_swap_pages() under memory pressure. 64 CPU cores, 64GB memory, and 28 zram devices, the disksize of each zram device is 50MB with same priority as si. Use the stress-ng tool to increase memory pressure, causing the system to oom frequently. The plist_for_each_entry_safe() loops in get_swap_pages() could reach tens of thousands of times to find available space (extreme case: cond_resched() is not called in scan_swap_map_slots()). Let's add cond_resched() into get_swap_pages() when failed to find available space to avoid softlockup.

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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-667 CWE-667

Affected Products

Vendor	Product	Versions
linux	linux_kernel	< 4.14.306
linux	linux_kernel	4.15 — 4.19.273
linux	linux_kernel	4.20 — 5.4.232
linux	linux_kernel	5.5 — 5.10.168
linux	linux_kernel	5.11 — 5.15.93
linux	linux_kernel	5.16 — 6.1.11
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/29f0349c5c76b627fe06b87d4b13fa03a6ce8e64 https://git.kernel.org/stable/c/30187be29052bba9203b0ae2bdd815e0bc2faaab https://git.kernel.org/stable/c/387217b97e99699c34e6d95ce2b91b327fcd853e https://git.kernel.org/stable/c/49178d4d61e78aed8c837dfeea8a450700f196e2 https://git.kernel.org/stable/c/5dbe1ebd56470d03b78fc31491a9e4d433106ef2 https://git.kernel.org/stable/c/7717fc1a12f88701573f9ed897cc4f6699c661e3 https://git.kernel.org/stable/c/d49c85a1913385eed46dd16a25ad0928253767f0

Frequently Asked Questions

What is CVE-2023-52932? +

In the Linux kernel, the following vulnerability has been resolved: mm/swapfile: add cond_resched() in get_swap_pages() The softlockup still occurs in get_swap_pages() under memory pressure. 64 CPU cores, 64GB memory, and 28 zram devices, the disksize of each zram device is 50MB with same priority as si. Use the stress-ng tool to increase memory pressure, causing the system to oom frequently. The plist_for_each_entry_safe() loops in get_swap_pages() could reach tens of thousands of times to find available space (extreme case: cond_resched() is not called in scan_swap_map_slots()). Let's add cond_resched() into get_swap_pages() when failed to find available space to avoid softlockup. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2023-52932? +

CVE-2023-52932 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2023-52932? +

CVE-2023-52932 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2023-52932? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2023-52932