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Vulnerability details: VCID-x4wf-7dmt-sfaq
Vulnerability ID VCID-x4wf-7dmt-sfaq
Aliases CVE-2021-45941
Summary Out-of-bounds Write libbpf has a heap-based buffer overflow (8 bytes) in __bpf_object__open (called from bpf_object__open_mem and bpf-object-fuzzer.c).
Status Published
Exploitability 0.5
Weighted Severity 4.0
Risk 2.0
Affected and Fixed Packages Package Details
Weaknesses (4)
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-787 Out-of-bounds Write
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
System Score Found at
cvssv3 4.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-45941.json
epss 0.00159 https://api.first.org/data/v1/epss?cve=CVE-2021-45941
epss 0.00159 https://api.first.org/data/v1/epss?cve=CVE-2021-45941
epss 0.00159 https://api.first.org/data/v1/epss?cve=CVE-2021-45941
epss 0.00159 https://api.first.org/data/v1/epss?cve=CVE-2021-45941
epss 0.00159 https://api.first.org/data/v1/epss?cve=CVE-2021-45941
epss 0.00159 https://api.first.org/data/v1/epss?cve=CVE-2021-45941
epss 0.00159 https://api.first.org/data/v1/epss?cve=CVE-2021-45941
epss 0.00159 https://api.first.org/data/v1/epss?cve=CVE-2021-45941
epss 0.00159 https://api.first.org/data/v1/epss?cve=CVE-2021-45941
epss 0.00159 https://api.first.org/data/v1/epss?cve=CVE-2021-45941
epss 0.00159 https://api.first.org/data/v1/epss?cve=CVE-2021-45941
epss 0.00159 https://api.first.org/data/v1/epss?cve=CVE-2021-45941
epss 0.00159 https://api.first.org/data/v1/epss?cve=CVE-2021-45941
epss 0.00159 https://api.first.org/data/v1/epss?cve=CVE-2021-45941
epss 0.00159 https://api.first.org/data/v1/epss?cve=CVE-2021-45941
cvssv3.1 5.1 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-45941.json
https://api.first.org/data/v1/epss?cve=CVE-2021-45941
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=40957
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-45941
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/libbpf/OSV-2021-1576.yaml
2043387 https://bugzilla.redhat.com/show_bug.cgi?id=2043387
CVE-2021-45941 https://nvd.nist.gov/vuln/detail/CVE-2021-45941
USN-5759-1 https://usn.ubuntu.com/5759-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-45941.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.3675
EPSS Score 0.00159
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T12:49:12.729147+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/conan/libbpf/CVE-2021-45941.yml 38.0.0