Security readout for executives and security teams
Plain-English summary
CVE-2022-50415 is a Linux kernel availability bug in PA-RISC LED handling. If a workqueue allocation fails and the return value is not checked, the kernel can dereference NULL and crash. This is mainly a stability concern for affected systems, not a data theft or remote takeover issue based on the supplied sources.
Executive priority
Treat this as a moderate patch-management item. It can crash affected systems but does not indicate remote compromise, data loss, or active exploitation in the supplied evidence. Prioritize where legacy PA-RISC or matching kernels support important services.
Technical view
In parisc LED start_task(), create_singlethread_workqueue() may return NULL. The vulnerable path queues delayed work anyway, eventually accessing wq->flags through a NULL workqueue pointer. The fix checks the return value and returns -ENOMEM on allocation failure. CVSS is 5.5: local attack vector, low complexity, low privileges, high availability impact.
Likely exposure
Exposure appears limited to affected Linux kernel builds containing the PA-RISC LED start_task() logic, especially PA-RISC systems. The record lists Linux kernel versions from 2.6.15 through 6.2 and fixed stable commits. General Linux fleet exposure outside that architecture-specific path is not established by the supplied sources.
Exploitation context
The CVE is not listed as KEV, and the supplied sources do not state active exploitation or public exploit availability. The CVSS vector indicates local, low-privilege conditions with no user interaction and availability-only impact. Practical triggering requirements are not fully described in the source bundle.
Researcher notes
Source evidence is concise and kernel-focused. It identifies the faulty allocation check, CWE-476, CVSS vector, and stable fix commits, but does not describe a concrete trigger path, exploit maturity, or distribution-specific package status. Validate against downstream vendor backports before declaring exposure.
Mitigation direction
- Apply vendor kernel updates that include the listed stable kernel fixes.
- Prioritize PA-RISC systems and kernels matching the affected version list.
- Use distribution advisories to confirm the exact fixed package version.
- If no package is available, follow vendor guidance for backport status.
- Restrict unnecessary local user access on vulnerable multi-user systems.
Validation and detection
- Inventory Linux kernel version and CPU architecture across relevant assets.
- Check whether PA-RISC LED driver code is present in deployed kernels.
- Compare installed kernels against vendor advisories and listed stable commits.
- Review package changelogs for CVE-2022-50415 or the fix commits.
- Confirm patched systems boot and retain expected hardware monitoring behavior.
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-476: 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-2022-50415 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
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/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:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H1.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/c6db0c32f39684c89c97bc1ba1c9c4249ca09e48CVE reference
- https://git.kernel.org/stable/c/fc6d0f65f22040c6cc8a5ce032bf90252629de50CVE reference
- https://git.kernel.org/stable/c/fc307b2905a3dd75c50a53b4d87ac9c912fb7c4eCVE reference
- https://git.kernel.org/stable/c/5e4500454d75dd249be4695d83afa3ba0724c37eCVE reference
- https://git.kernel.org/stable/c/3505c187b86136250b39e62c72a3a70435277af6CVE reference
- https://git.kernel.org/stable/c/ac838c663ba1fd6bff35a817fd89a47ab55e88e0CVE reference
- https://git.kernel.org/stable/c/77f8b628affaec692d83ad8bfa3520db8a0cc493CVE reference
- https://git.kernel.org/stable/c/67c98fec87ed76b1feb2ae810051afd88dfa9df6CVE reference
- https://git.kernel.org/stable/c/41f563ab3c33698bdfc3403c7c2e6c94e73681e4CVE reference
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.
NULL Pointer Dereference
NULL Pointer Dereference represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.