CVE-2021-43299

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-02-17. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 3%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

Stack overflow in PJSUA API when calling pjsua_player_create. An attacker-controlled 'filename' argument may cause a buffer overflow since it is copied to a fixed-size stack buffer without any size validation.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
50(Track)
EG Risk 50/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation3% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
83.1%
KEV
Not listed

Published

February 16, 2022

Last Modified

November 4, 2025

Advisory Details (5)

Auto-updated Jun 12, 2026
Patch available. Sources: github.
generic Patch Available

[SECURITY] [DLA 3887-1] ring security update

https://lists.debian.org/debian-lts-announce/2024/09/msg00030.html
generic Patch Available

[SECURITY] [DLA 3549-1] ring security update

https://lists.debian.org/debian-lts-announce/2023/08/msg00038.html
generic Patch Available

[SECURITY] [DLA 3194-1] asterisk security update

https://lists.debian.org/debian-lts-announce/2022/11/msg00021.html
generic Patch Available

[SECURITY] [DLA 2962-1] pjproject security update

https://lists.debian.org/debian-lts-announce/2022/03/msg00035.html
github Patch Available

Potential buffer overflow in pjsua_player_create(), pjsua_recorder_create(), pjmedia_wav_player_create(), and pjsua_call_dump() · Advisory · pjsip/pjproject · GitHub

https://github.com/pjsip/pjproject/security/advisories/GHSA-qcvw-h34v-c7r9

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntujami-daemon (20230206.0~ds1-5ubuntu0.1) @ lunar2026-05-26ubuntu
ubuntulibpjsua2 (2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1) @ xenial2026-05-26ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(2)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 12× in last 7d / 50× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 109 total refreshes for this CVE.

  1. 2026-07-23 14:16 UTCEPSS rescore
  2. 2026-07-23 02:05 UTCEG score recompute
  3. 2026-07-22 22:51 UTCEG score recompute
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  1. 2026-07-08 15:12 UTCEPSS rescore
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  47. 2026-06-12 08:40 UTCOSV refresh
  48. 2026-06-11 13:58 UTCEPSS rescore
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  50. 2026-06-10 22:16 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2021-43299?
CVE-2021-43299 is a critical vulnerability published on February 16, 2022. Stack overflow in PJSUA API when calling pjsuaplayercreate. An attacker-controlled 'filename' argument may cause a buffer overflow since it is copied to a fixed-size stack buffer without any size validation.
When was CVE-2021-43299 disclosed?
CVE-2021-43299 was first published in the National Vulnerability Database on February 16, 2022, with the most recent update on November 4, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-43299 actively exploited?
CVE-2021-43299 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 83.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-43299?
CVE-2021-43299 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2021-43299?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-43299, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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