CVE-2022-49748: linux kernel Integer Overflow — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: perf/x86/amd: fix potential integer overflow on shift of a int The left shift of int 32 bit integer constant 1 is evaluated using 32 bit arithmetic and then passed as a 64 bit function argument. In the case where i is 32 or more this can lead to an overflow. Avoid this by shifting using the BIT_ULL macro instead.

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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-190 Integer Overflow

Affected Products

Vendor	Product	Versions
linux	linux_kernel	5.4.22 — 5.4.231
linux	linux_kernel	5.5.6 — 5.10.166
linux	linux_kernel	5.11 — 5.15.91
linux	linux_kernel	5.16 — 6.1.9
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/08245672cdc6505550d1a5020603b0a8d4a6dcc7 https://git.kernel.org/stable/c/14cc13e433e1067557435b1adbf05608d7d47a93 https://git.kernel.org/stable/c/a4d01fb87ece45d4164fd725890211ccf9a307a9 https://git.kernel.org/stable/c/f84c9b72fb200633774704d8020f769c88a4b249 https://git.kernel.org/stable/c/fbf7b0e4cef3b5470b610f14fb9faa5ee7f63954

Frequently Asked Questions

What is CVE-2022-49748? +

In the Linux kernel, the following vulnerability has been resolved: perf/x86/amd: fix potential integer overflow on shift of a int The left shift of int 32 bit integer constant 1 is evaluated using 32 bit arithmetic and then passed as a 64 bit function argument. In the case where i is 32 or more this can lead to an overflow. Avoid this by shifting using the BIT_ULL macro instead. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2022-49748? +

CVE-2022-49748 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-2022-49748? +

CVE-2022-49748 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-2022-49748? +

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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