Vulnerability Monitor

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CVE-2021-45469

In __f2fs_setxattr in fs/f2fs/xattr.c in the Linux kernel through 5.15.11, there is an out-of-bounds memory access when an inode has an invalid last xattr entry.

Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.8, requiring local system access to exploit with relatively low complexity without requiring user interaction requiring only low-level privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 19 products from linux, from fedoraproject, from debian and 16 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2021, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2021-12-23T19:15:12.693

Last Modified

2024-11-21T06:32:16.480

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.8 (HIGH)

CVSSv2 Vector

AV:L/AC:L/Au:N/C:P/I:P/A:P

Access Vector: LOCAL
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

3.9

Impact Score

6.4

Weaknesses

Type: Primary
CWE-125

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	linux	linux_kernel	≤ 5.15.11	Yes
Operating System	fedoraproject	fedora	34	Yes
Operating System	fedoraproject	fedora	35	Yes
Operating System	debian	debian_linux	9.0	Yes
Operating System	debian	debian_linux	10.0	Yes
Operating System	debian	debian_linux	11.0	Yes
Operating System	netapp	h410c_firmware	-	Yes
Hardware	netapp	h410c	-	No
Operating System	netapp	h300s_firmware	-	Yes
Hardware	netapp	h300s	-	No
Operating System	netapp	h500s_firmware	-	Yes
Hardware	netapp	h500s	-	No
Operating System	netapp	h700s_firmware	-	Yes
Hardware	netapp	h700s	-	No
Operating System	netapp	h300e_firmware	-	Yes
Hardware	netapp	h300e	-	No
Operating System	netapp	h500e_firmware	-	Yes
Hardware	netapp	h500e	-	No
Operating System	netapp	h700e_firmware	-	Yes
Hardware	netapp	h700e	-	No
Operating System	netapp	h410s_firmware	-	Yes
Hardware	netapp	h410s	-	No

References

http://www.openwall.com/lists/oss-security/2021/12/25/1 Mailing List, Third Party Advisory ([email protected])
https://bugzilla.kernel.org/show_bug.cgi?id=215235 Exploit, Issue Tracking, Patch, Vendor Advisory ([email protected])
https://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git/commit/?h=dev&id=5598b24efaf4892741c798b425d543e4bed357a1 Exploit, Patch, Vendor Advisory ([email protected])
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html Mailing List, Third Party Advisory ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AK2C4A43BZSWATZWFUHHHUQF3HPIALNP/ ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QG7XV2WXKMSMKIQKIBG5LW3Y3GXEWG5Q/ ([email protected])
https://security.netapp.com/advisory/ntap-20220114-0003/ Third Party Advisory ([email protected])
https://www.debian.org/security/2022/dsa-5050 Third Party Advisory ([email protected])
https://www.debian.org/security/2022/dsa-5096 Third Party Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2021/12/25/1 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.kernel.org/show_bug.cgi?id=215235 Exploit, Issue Tracking, Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://git.kernel.org/pub/scm/linux/kernel/git/chao/linux.git/commit/?h=dev&id=5598b24efaf4892741c798b425d543e4bed357a1 Exploit, Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AK2C4A43BZSWATZWFUHHHUQF3HPIALNP/ (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QG7XV2WXKMSMKIQKIBG5LW3Y3GXEWG5Q/ (af854a3a-2127-422b-91ae-364da2661108)
https://security.netapp.com/advisory/ntap-20220114-0003/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.debian.org/security/2022/dsa-5050 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.debian.org/security/2022/dsa-5096 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For linux's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.