Security readout for executives and security teams
Plain-English summary
CVE-2022-38936 is a crash flaw in PBC through 2022-08-27. If exposed code processes hostile network input, an attacker may be able to trigger a segmentation fault and interrupt service availability. The sources do not show data theft or code execution impact.
Executive priority
Treat this as high priority where PBC is reachable through customer-facing or unauthenticated services. The business risk is service interruption, not confirmed compromise. If PBC is absent or only used offline with trusted inputs, urgency decreases.
Technical view
The CVE describes a SEGV in pbc_wmessage_integer at src/wmessage.c:137, categorized as CWE-252. CVSS 3.1 is 7.5 with network attack vector, no privileges, no user interaction, and availability-only impact.
Likely exposure
Exposure is most likely where PBC through 2022-08-27 is embedded in services that parse or construct messages from untrusted network input. The CVE record lists affected vendor and product as n/a, so asset discovery may require dependency and source-code review.
Exploitation context
The supplied bundle marks KEV as false, and no cited source states active exploitation. Risk is highest for internet-facing or unauthenticated services because the CVSS vector indicates network reachability and no required privileges or user interaction.
Researcher notes
Evidence is limited to the CVE description and the referenced GitHub issue. The affected product metadata is incomplete, and the bundle does not name a patch. Avoid assuming exploit availability or fixed versions without checking upstream guidance.
Mitigation direction
- Identify all applications and libraries using PBC through 2022-08-27.
- Check upstream cloudwu/pbc issue and vendor guidance for fixed releases or commits.
- Reduce unauthenticated exposure of services that pass untrusted input to PBC.
- Add crash monitoring and restart safeguards for affected services.
- Prioritize remediation for internet-facing or business-critical parsers.
Validation and detection
- Inventory dependencies for cloudwu/pbc or bundled PBC source copies.
- Check whether src/wmessage.c includes pbc_wmessage_integer from affected code.
- Map PBC use to externally reachable request or message-processing paths.
- Review logs and crash reports for SEGV events in pbc_wmessage_integer.
- Confirm any applied update against upstream guidance before closing the finding.
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-252: 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-2022-38936 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
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/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:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/cloudwu/pbc/issues/158CVE reference · x_refsource_MISC
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.
Unchecked Return Value
Unchecked Return Value represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.