Security readout for executives and security teams
Plain-English summary
A timing flaw in Linux’s MediaTek T7xx WWAN driver can cause a kernel crash when a modem state-change task finishes after its caller has timed out. Affected systems may lose availability and require recovery. Risk is concentrated on Linux devices that actually use this WWAN driver and relevant hardware.
Executive priority
Treat as a high-priority reliability and kernel-security update where T7xx WWAN is deployed. Establish hardware and driver exposure first, then patch through supported vendor channels. Systems lacking the relevant driver can be deprioritized after verification. There is no supplied evidence of active exploitation.
Technical view
The driver handles internal state changes asynchronously. After a timeout, the main thread can release its completion object while the worker still references it. A later completion notification accesses released memory, producing a page fault and kernel panic. The fix uses reference counting to keep the object alive safely.
Likely exposure
Exposure requires an affected Linux kernel plus the MediaTek T7xx WWAN driver in a relevant operational path. The bundle lists affected release markers, but their precise range semantics are incomplete. Systems without this driver or hardware are unlikely to reach the vulnerable code.
Exploitation context
The CVSS vector describes a local, low-complexity, low-privilege condition requiring no user interaction. However, the supplied sources do not establish a reliable attacker-controlled trigger. The CVE is not listed as KEV, and no cited evidence confirms active exploitation or a public exploit.
Researcher notes
The failure resembles a lifetime-management race involving a completion object rather than a documented direct privilege-escalation primitive. The observed result is a page fault in complete_all from fsm_main_thread. Reference counting addresses the late worker notification. Exact affected and fixed version boundaries should be confirmed through distribution advisories and stable commits.
Mitigation direction
- Update to a vendor-supported kernel confirmed to incorporate the referenced stable fix.
- Check the Linux distribution or device vendor advisory for the exact fixed package version.
- Prioritize WWAN gateways, laptops, and embedded devices confirmed to use the T7xx driver.
- Where updating is delayed, ask the vendor for supported risk-reduction guidance.
Validation and detection
- Inventory kernel versions on systems using MediaTek T7xx WWAN hardware.
- Confirm whether the mtk_t7xx driver is present and actively used.
- Verify the installed vendor kernel includes the applicable referenced stable commit.
- Review kernel logs for related page faults, oops reports, or panics.
- Retest modem state transitions and timeout handling after updating.
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.
CVE-2024-39282 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.
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:H1.85.9LinuxVulnerability 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/b8ab9bd0c8855cd5a6f4e0265083576257ff3fc5CVE reference, Linux
- https://git.kernel.org/stable/c/0cd3bde081cd3452c875fa1e5c55834c670d6e05CVE reference, Linux
- https://git.kernel.org/stable/c/e6e6882a1590cbdaca77a31a02f4954327237e14CVE reference, Linux
- https://git.kernel.org/stable/c/4f619d518db9cd1a933c3a095a5f95d0c1584ae8CVE reference, Linux
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.htmlCVE reference, CVE
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.