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Vulnerability details: VCID-4zzj-t3b7-qkbj
Vulnerability ID VCID-4zzj-t3b7-qkbj
Aliases CVE-2021-46828
Summary In libtirpc before 1.3.3rc1, remote attackers could exhaust the file descriptors of a process that uses libtirpc because idle TCP connections are mishandled. This can, in turn, lead to an svc_run infinite loop without accepting new connections.
Status Published
Exploitability 0.5
Weighted Severity 6.8
Risk 3.4
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-400 Uncontrolled Resource Consumption
CWE-755 Improper Handling of Exceptional Conditions
CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')
System Score Found at
cvssv3.1 7.5 http://git.linux-nfs.org/?p=steved/libtirpc.git%3Ba=commit%3Bh=86529758570cef4c73fb9b9c4104fdc510f701ed
ssvc Track http://git.linux-nfs.org/?p=steved/libtirpc.git%3Ba=commit%3Bh=86529758570cef4c73fb9b9c4104fdc510f701ed
cvssv3 7.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-46828.json
epss 0.0032 https://api.first.org/data/v1/epss?cve=CVE-2021-46828
epss 0.0032 https://api.first.org/data/v1/epss?cve=CVE-2021-46828
epss 0.0032 https://api.first.org/data/v1/epss?cve=CVE-2021-46828
epss 0.0032 https://api.first.org/data/v1/epss?cve=CVE-2021-46828
epss 0.0032 https://api.first.org/data/v1/epss?cve=CVE-2021-46828
epss 0.0032 https://api.first.org/data/v1/epss?cve=CVE-2021-46828
epss 0.0032 https://api.first.org/data/v1/epss?cve=CVE-2021-46828
epss 0.0032 https://api.first.org/data/v1/epss?cve=CVE-2021-46828
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-46828
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-46828
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-46828
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-46828
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-46828
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-46828
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-46828
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-46828
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-46828
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-46828
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-46828
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-46828
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-46828
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-46828
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-46828
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-46828
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-46828
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-46828
epss 0.00372 https://api.first.org/data/v1/epss?cve=CVE-2021-46828
epss 0.00382 https://api.first.org/data/v1/epss?cve=CVE-2021-46828
cvssv3.1 7.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1 7.5 https://lists.debian.org/debian-lts-announce/2022/08/msg00004.html
ssvc Track https://lists.debian.org/debian-lts-announce/2022/08/msg00004.html
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2021-46828
cvssv3.1 7.5 https://security.gentoo.org/glsa/202210-33
ssvc Track https://security.gentoo.org/glsa/202210-33
cvssv3.1 7.5 https://security.netapp.com/advisory/ntap-20221007-0004/
ssvc Track https://security.netapp.com/advisory/ntap-20221007-0004/
cvssv3.1 7.5 https://www.debian.org/security/2022/dsa-5200
ssvc Track https://www.debian.org/security/2022/dsa-5200
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-46828.json
https://api.first.org/data/v1/epss?cve=CVE-2021-46828
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-46828
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
1015873 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1015873
202210-33 https://security.gentoo.org/glsa/202210-33
2109352 https://bugzilla.redhat.com/show_bug.cgi?id=2109352
cpe:2.3:a:libtirpc_project:libtirpc:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:libtirpc_project:libtirpc:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
CVE-2021-46828 https://nvd.nist.gov/vuln/detail/CVE-2021-46828
dsa-5200 https://www.debian.org/security/2022/dsa-5200
libtirpc.git%3Ba=commit%3Bh=86529758570cef4c73fb9b9c4104fdc510f701ed http://git.linux-nfs.org/?p=steved/libtirpc.git%3Ba=commit%3Bh=86529758570cef4c73fb9b9c4104fdc510f701ed
msg00004.html https://lists.debian.org/debian-lts-announce/2022/08/msg00004.html
ntap-20221007-0004 https://security.netapp.com/advisory/ntap-20221007-0004/
RHSA-2022:8400 https://access.redhat.com/errata/RHSA-2022:8400
USN-5538-1 https://usn.ubuntu.com/5538-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at http://git.linux-nfs.org/?p=steved/libtirpc.git%3Ba=commit%3Bh=86529758570cef4c73fb9b9c4104fdc510f701ed
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

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none

required

unchanged

changed

high

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none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-04-23T13:27:08Z/ Found at http://git.linux-nfs.org/?p=steved/libtirpc.git%3Ba=commit%3Bh=86529758570cef4c73fb9b9c4104fdc510f701ed
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-46828.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

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none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 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

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low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://lists.debian.org/debian-lts-announce/2022/08/msg00004.html
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: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-04-23T13:27:08Z/ Found at https://lists.debian.org/debian-lts-announce/2022/08/msg00004.html
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-46828
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

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none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://security.gentoo.org/glsa/202210-33
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: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-04-23T13:27:08Z/ Found at https://security.gentoo.org/glsa/202210-33
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://security.netapp.com/advisory/ntap-20221007-0004/
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: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-04-23T13:27:08Z/ Found at https://security.netapp.com/advisory/ntap-20221007-0004/
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://www.debian.org/security/2022/dsa-5200
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: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2025-04-23T13:27:08Z/ Found at https://www.debian.org/security/2022/dsa-5200
Exploit Prediction Scoring System (EPSS)
Percentile 0.54489
EPSS Score 0.0032
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:31:11.924018+00:00 Alpine Linux Importer Import https://secdb.alpinelinux.org/v3.16/main.json 37.0.0