Security readout for executives and security teams
Plain-English summary
This is a Linux kernel memory leak in the AMT advertisement message handling path. A low-privileged local user could potentially trigger availability impact by causing kernel memory to be consumed. The sources do not indicate data theft, data modification, or confirmed exploitation.
Executive priority
Treat this as a routine but real availability issue. It is not described as remotely exploitable or actively exploited, but patching matters for multi-user Linux systems and environments where local accounts are less trusted.
Technical view
The AMT gateway advertisement handler extracts relay information but fails to free it, producing a CWE-401 memory leak. CVSS 3.1 is 5.5 with local access, low complexity, low privileges, no user interaction, and high availability impact only.
Likely exposure
Exposure is most relevant to systems running affected Linux kernels where the AMT component is present or used. The bundle names Linux kernel versions and stable commits, but exact exposure should be confirmed through the distribution’s kernel advisory and backport status.
Exploitation context
CISA KEV status is false in the bundle, and no cited source states active exploitation. The CVSS vector requires local access with low privileges, so business risk is mainly denial-of-service on already-accessible systems.
Researcher notes
The public description is concise and does not provide detailed trigger conditions beyond AMT advertisement handling. Avoid assuming remote exploitability despite the message-processing context; the provided CVSS vector is local and low-privilege.
Mitigation direction
- Apply a vendor kernel update that includes the AMT memory leak fix.
- Confirm whether your distro backported one of the referenced stable fixes.
- Prioritize shared servers where untrusted local users have accounts.
- Where operationally safe, avoid enabling AMT until patched.
- Check vendor guidance before using non-distribution kernel changes.
Validation and detection
- Inventory Linux kernel versions across affected hosts.
- Check distro advisories for CVE-2022-49461 backport status.
- Verify patched kernels include the referenced stable fix lineage.
- Identify systems with AMT support enabled or loaded.
- Review monitoring for unexplained kernel memory pressure.
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-2022-49461 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/19bb2d57eac86a368839a92117d8a10ab7183623CVE reference, Linux
- https://git.kernel.org/stable/c/e7322da399fb86a2072f008b56f7160afa1b2051CVE reference, Linux
- https://git.kernel.org/stable/c/fe29794c3585d039fefebaa2b5a4932a627ad4fdCVE 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.