Security readout for executives and security teams
Plain-English summary
This Linux kernel issue is a double-free bug in the MediaTek SCP remote processor driver. A local user with low privileges could potentially cause serious confidentiality, integrity, or availability impact on affected systems. Exposure is likely limited to kernels and devices using this driver path.
Executive priority
Treat as high priority for affected MediaTek Linux fleets, especially embedded or appliance environments. It is not a broad internet-facing emergency based on the provided evidence, but affected local multi-user or exposed device contexts should patch promptly.
Technical view
The flaw is CWE-415 in remoteproc/mtk_scp remove handling. The source says scp->rproc is allocated with devm_rproc_alloc(), so explicit freeing in remove could free managed memory twice. CVSS 3.1 is 7.8 with local, low-privilege, no-user-interaction conditions.
Likely exposure
Most likely exposure is Linux 5.18-era systems or embedded devices using the MediaTek SCP remoteproc driver. Generic systems without this hardware or driver are less likely affected. Distribution kernels need separate verification because vendors may backport fixes without changing major version numbers.
Exploitation context
The provided sources do not show active exploitation, and the CVE is not marked KEV. The CVSS vector indicates a local attacker with low privileges and no user interaction could trigger high confidentiality, integrity, and availability impact.
Researcher notes
The source evidence identifies the bug class and fix rationale but does not provide exploit details or broad affected distro mapping. Focus validation on kernel provenance, driver reachability, and whether devm_rproc_alloc() ownership is corrected by the stable commits.
Mitigation direction
- Update affected Linux kernels using vendor or distribution guidance.
- Confirm the referenced upstream stable fixes are included in deployed kernels.
- Prioritize MediaTek-based devices using the SCP remoteproc driver.
- Limit untrusted local access until patched, where operationally feasible.
Validation and detection
- Inventory Linux kernel versions across MediaTek-based systems.
- Check whether the mtk_scp remoteproc driver is present or loaded.
- Compare vendor kernel changelogs against the referenced stable commits.
- Use distribution advisories to confirm backported fix status.
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-415: 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-2022-49391 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
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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:H/I:H/A:H1.85.9CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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/adc02700236613b344a947a897fc2741d52a43b9CVE reference, Linux
- https://git.kernel.org/stable/c/eac3e5b1c12f85732e60f5f8b985444d273866bbCVE 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.
Double Free
Double Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.