Security readout for executives and security teams
Plain-English summary
A race condition in the Linux MediaTek video encoder driver can leave an encoder context unavailable while another kernel function accesses it, causing a NULL-pointer access. Because exploitation requires local, low-privileged access and affected MediaTek video-encoding functionality, exposure is narrower than for a remote flaw. The supplied CVSS 3.1 score is 7.8.
Executive priority
Treat as a high-priority targeted kernel update for confirmed MediaTek encoder deployments, especially shared devices or systems running untrusted local workloads. Lower the operational priority where the hardware or driver is absent. There is no cited evidence of active exploitation, but kernel-context faults justify timely remediation after validating applicability.
Technical view
The MediaTek vcodec encoder context list lacked locking. Unexpected behavior in the SCP IP block could delete the list before vpu_enc_ipi_handler accessed it. The upstream resolution adds synchronization around the list. The description confirms a NULL-pointer access; it does not establish arbitrary code execution, privilege escalation, or a demonstrated confidentiality or integrity compromise.
Likely exposure
Systems running affected Linux kernel versions are relevant only when they include and expose the MediaTek vcodec encoder path. The bundle lists affected version markers involving 6.6, 6.6.27, 6.8.6, and 6.9, but does not clearly express their range semantics. Distribution backports may change exposure independently of the displayed kernel version.
Exploitation context
The CVSS vector describes local access, low privileges, low complexity, and no user interaction. The supplied bundle marks the CVE as absent from KEV, and no cited source reports active exploitation or a public exploit. Practical triggering also appears dependent on the MediaTek encoder and unexpected SCP behavior; the available evidence does not quantify reliability.
Researcher notes
The core issue is unsynchronized lifetime management of ctx_list across encoder and SCP-related handling. The patch adds locking to prevent access after deletion. Source evidence establishes a potential NULL dereference but does not demonstrate exploitation beyond that failure mode. Exact vulnerable-version boundaries and vendor backport status require platform-specific confirmation.
Mitigation direction
- Install a vendor-supported kernel containing the applicable stable fix or documented backport.
- Check distribution and device-vendor advisories for the precise fixed package version.
- If patching is delayed, restrict untrusted local access to exposed MediaTek video-encoding functionality.
- Prioritize shared or untrusted-workload systems where local users can access the encoder device.
Validation and detection
- Inventory systems using MediaTek hardware and the Linux MediaTek vcodec encoder driver.
- Confirm the running kernel package includes the applicable fix commit or vendor backport.
- Review distribution changelogs rather than relying solely on the displayed kernel version.
- Verify untrusted users and workloads cannot access relevant video-encoding interfaces after temporary restrictions.
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
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CVE-2024-35919 mapping review
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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
2 official scoresWe 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:H1.85.9LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H15.9CISA-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
Base CVSS 3.1 score
7HighVector: CVSS:3.1/AV:L/AC:H/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/41671f0c0182b2bae74ca7e3b0f155559e3e2fc5CVE reference, Linux
- https://git.kernel.org/stable/c/51c84a8aac6e3b59af2b0e92ba63cabe2e641a2dCVE reference, Linux
- https://git.kernel.org/stable/c/afaaf3a0f647a24a7bf6a2145d8ade37baaf75adCVE 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.