Security readout for executives and security teams
Plain-English summary
This is a Linux kernel memory leak in the IOSM WWAN network driver. A local user or local process could potentially consume kernel memory and affect system availability. The sources do not indicate data theft, privilege escalation, remote access, or active exploitation.
Executive priority
Treat as a moderate patching item for Linux endpoints or embedded systems using cellular WWAN. It is not currently evidenced as remotely exploitable or actively exploited, but availability impact can matter on critical or unattended systems.
Technical view
The iosm WWAN driver registered network devices without needs_free_netdev and did not call free_netdev during unregister. That can leak kernel memory when WWAN links are removed. The fix sets needs_free_netdev so the networking subsystem frees the device after unregister_netdevice.
Likely exposure
Exposure is most likely on Linux systems running affected kernels with the IOSM WWAN driver present or in use. The provided data lists Linux 5.14 through fixed stable ranges including 5.15.79, 6.0.9, and 6.1, but distribution backports must be checked.
Exploitation context
The CVSS vector is local, low complexity, low privileges, no user interaction, and high availability impact. KEV is false, and the provided sources do not show public exploitation or weaponized details.
Researcher notes
Evidence is limited to the CVE record and upstream stable commits. The vulnerability is CWE-401 memory leak with availability-only CVSS impact. Validate exposure through kernel version, distribution backport status, and whether IOSM WWAN functionality is reachable in the deployment.
Mitigation direction
- Apply a vendor or distribution kernel update containing the referenced stable fixes.
- Check Linux vendor advisories for the exact fixed package in your distribution.
- Reboot into the fixed kernel after updating.
- Prioritize systems using WWAN, cellular modems, or the IOSM driver.
Validation and detection
- Inventory running Linux kernel versions and compare them with vendor fixed builds.
- Confirm the installed kernel includes the referenced upstream stable commits or backports.
- Identify hosts where the IOSM WWAN driver is present or used.
- Monitor affected hosts for abnormal kernel memory pressure until patched.
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-401: 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-2022-49867 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.
SSVC decision data
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:H1.83.6CISA-ADPVulnerability 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
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/2ce2348c2858d723f7fe389dead9b43b08e0944eCVE reference, Linux
- https://git.kernel.org/stable/c/128514b51a5ba2c82f9e4a106f1c10423907618aCVE reference, Linux
- https://git.kernel.org/stable/c/f25caaca424703d5a0607310f0452f978f1f78d9CVE reference, Linux
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.
Missing Release of Memory after Effective Lifetime
Missing Release of Memory after Effective Lifetime represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.