PT-2024-11298 · Linux+2 · Linux Kernel+2

Syzbot · Published 2021-07-15 · Updated 2025-04-02 · CVE-2021-47297

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The issue is related to an uninitialized value in the caif seqpkt sendmsg function, which is defined in sys sendmsg. When nr segs equals zero in iovec from user, the object msg->msg iter.iov is uninitialized stack memory. This can be resolved by using nr segs to judge whether the message has data buffers. The vulnerability was identified by KMSAN, which reported an uninitialized value in caif seqpkt sendmsg+0x693/0xf60 at net/caif/caif socket.c:542.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Use of Uninitialized Resource

Weakness Enumeration

CWE-908

CWE-99

Related Identifiers

BDU:2025-07387

CVE-2021-47297

OESA-2024-1692

SUSE-SU-2024:2360-1

SUSE-SU-2024:2381-1

SUSE-SU-2024:2561-1

Affected Products

Astra Linux

Linux Kernel

Suse

References · 479

• https://git.kernel.org/stable/c/d9d646acad2c3590e189bb5d5c86ab8bd8a2dfc3 · Patch
• https://git.kernel.org/stable/c/452c3ed7bf63721b07bc2238ed1261bb26027e85 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2024-35823 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2024-27399 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-47458 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-47357 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-47443 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-47297 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-27020 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2024-36015 · Security Note
• https://osv.dev/vulnerability/CVE-2021-47297 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-36004 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-47559 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-47397 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-52804 · Security Note