Security readout for executives and security teams
Plain-English summary
This flaw can make software using PJSIP freeze under certain error conditions because internal locks are not released. The business impact is service availability: VoIP, SIP, or multimedia communication services could become unavailable until recovered. Sources do not show active exploitation.
Executive priority
Treat as a moderate availability risk. It is not presented as exploited or confidentiality-impacting, but communication platforms can be business-critical. Prioritize exposed or high-availability voice and SIP services, then embedded or internal uses.
Technical view
PJSIP/pjproject versions up to and including 2.11.1 can return from failure paths while holding locks, causing deadlock and denial of service. The CVSS 3.1 score is 5.9, with network attack vector, high complexity, no privileges, no user interaction, and high availability impact.
Likely exposure
Exposure is most likely where pjproject/PJSIP is embedded in SIP, VoIP, or multimedia communication applications, especially custom builds or packages at version 2.11.1 or older.
Exploitation context
The bundle marks KEV as false and provides no cited evidence of active exploitation. The advisory describes denial of service through deadlock, not data theft or code execution. Attack complexity is rated high.
Researcher notes
Focus validation on version provenance and patch presence. The sources identify CWE-667 and a deadlock from unreleased locks on error paths. Evidence is incomplete for exploitability details, affected downstream products, and universal fixed release status beyond cited vendor and distro advisories.
Mitigation direction
- Inventory products and services that include PJSIP or pjproject.
- Upgrade via available distribution security updates where applicable.
- For affected upstream builds, apply the linked pjproject fix commit as directed.
- Track PJSIP vendor guidance for fixed releases and package availability.
- Prioritize internet-facing SIP or VoIP services first.
Validation and detection
- Confirm deployed pjproject/PJSIP versions are not 2.11.1 or older.
- For source builds, verify the linked lock-release fix is present.
- Check Debian or Gentoo package advisories when using those distributions.
- Review service monitoring for unexplained SIP or media-service hangs.
- Confirm recovery procedures exist for communication service deadlocks.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-667: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-41141 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.9 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H2.23.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.9MediumVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/pjsip/pjproject/security/advisories/GHSA-8fmx-hqw7-6gmcCVE reference
- https://github.com/pjsip/pjproject/commit/1aa2c0e0fb60a1b0bf793e0d834073ffe50fb196CVE reference
- [debian-lts-announce] 20220328 [SECURITY] [DLA 2962-1] pjproject security updateCVE reference · mailing-list
- GLSA-202210-37CVE reference · vendor-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Locking
Improper Locking represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.