Security readout for executives and security teams
Plain-English summary
PHP 8.1 versions before 8.1.8 can corrupt heap memory when file information functions such as finfo_buffer process data. For organizations running affected PHP, the main concern is compromise risk where applications analyze attacker-supplied content.
Executive priority
Treat as a high-priority patching issue for affected PHP 8.1 services, but not as confirmed emergency exploitation based on the provided sources.
Technical view
CVE-2022-31627 is a CWE-590 memory management flaw in PHP fileinfo. An incorrect patch to bundled libmagic could use the wrong free function for allocated memory, causing heap corruption. CVSS is 7.7 with network attack vector, high complexity, no privileges, and no user interaction.
Likely exposure
Exposure is most likely in PHP 8.1.x before 8.1.8, especially applications or services that call fileinfo functions on uploaded or externally supplied content.
Exploitation context
The source bundle does not show CISA KEV listing or cited evidence of active exploitation. The CVSS vector indicates remote reachability but high attack complexity.
Researcher notes
Evidence supports affected PHP 8.1.x before 8.1.8 and heap corruption in fileinfo/libmagic integration. Public sources provided do not establish exploit availability, exploitation in the wild, or product impact beyond listed advisories.
Mitigation direction
- Upgrade PHP 8.1 deployments to 8.1.8 or later.
- Apply distribution or appliance vendor security updates where PHP is embedded.
- Prioritize systems processing untrusted uploads or file buffers.
- Check PHP, Gentoo, NetApp, and platform vendor advisories for package-specific guidance.
Validation and detection
- Inventory running PHP versions and flag 8.1.x below 8.1.8.
- Identify code paths using fileinfo functions such as finfo_buffer.
- Confirm patched package versions after maintenance.
- Review crash or memory-corruption signals around file analysis workflows.
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-590: 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-2022-31627 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
- 7.7 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
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:H/I:H/A:L2.25.5Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.7HighVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://bugs.php.net/bug.php?id=81723CVE reference · x_refsource_MISC
- https://security.netapp.com/advisory/ntap-20220826-0008/CVE reference · x_refsource_CONFIRM
- GLSA-202209-20CVE reference · vendor-advisory, x_refsource_GENTOO
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.
Free of Memory not on the Heap
Free of Memory not on the Heap represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.