CVE-2021-47649

kernel: udmabuf: validate ubuf->pagecount

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · February 26, 2025

Updated · June 30, 2026

Description

A vulnerability was found in the Linux kernel in the udmabuf_create() function. An improper user-provided argument validation can lead to a ZERO_PTR value being passed to the sg_alloc_append_table_from_pages()` function, which attempts a dereference and leads to a kernel crash.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE not specified