Security readout for executives and security teams
Plain-English summary
This Linux kernel issue can crash affected systems when the MediaTek t7xx WWAN driver performs misaligned 64-bit register accesses on 64-bit platforms. The public record describes a kernel fault, not data theft or privilege escalation. Business impact is most likely device instability or outage on systems using this modem driver.
Executive priority
Prioritize remediation for network appliances, routers, embedded systems, or mobile-connected Linux devices that rely on MediaTek t7xx WWAN. For general Linux servers without this hardware or driver, urgency is lower but patch tracking remains appropriate because severity is not scored.
Technical view
The t7xx WWAN driver accessed some 32-bit-aligned registers as 64-bit values, causing alignment faults on 64-bit platforms. The kernel fix forces 64-bit accesses through paired non-atomic 32-bit operations using io-64-nonatomic-lo-hi handling. The crash trace involves mtk_t7xx during t7xx_fsm_uninit.
Likely exposure
Exposure is most plausible on Linux systems using the MediaTek t7xx WWAN driver on 64-bit platforms. The source lists Linux kernel versions including 5.19, 6.1.85, 6.6.26, 6.8.5, and 6.9 as affected. Systems without this driver or hardware are less likely exposed, but vendor kernel backports must be checked.
Exploitation context
No active exploitation is reported in the supplied sources, and the CVE is not marked KEV. The evidence shows a kernel oops caused by driver register access alignment, suggesting an availability and reliability issue. The source bundle does not establish remote exploitability or attacker-controlled triggering.
Researcher notes
The source evidence is narrow: a Linux kernel fix, crash trace, affected version metadata, and stable commit references. There is no CVSS, CWE, exploit claim, or named remote attack path. Treat conclusions about impact beyond kernel crash and availability as unproven.
Mitigation direction
- Apply vendor kernel updates that include the referenced stable t7xx fixes.
- Check distro or device-vendor advisories for backported fix status.
- Prioritize devices using MediaTek t7xx WWAN hardware or loading mtk_t7xx.
- If unused, disable the t7xx WWAN driver only through vendor-supported configuration.
- Avoid direct wrangling of kernel commits without vendor validation for production systems.
Validation and detection
- Inventory Linux kernel versions on systems with WWAN modem hardware.
- Confirm whether the mtk_t7xx driver is present or loaded.
- Map deployed kernels against vendor advisories and stable fix commits.
- Review crash logs for alignment faults involving t7xx_cldma or mtk_t7xx.
- Verify patched builds include the 32-bit split-access fix.
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-2024-35909 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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
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/beaf0e7996b79e06ccc2bdcb4442fbaeccc31200CVE reference, Linux
- https://git.kernel.org/stable/c/2e22c9cb618716b8e557fe17c3d4958171288082CVE reference, Linux
- https://git.kernel.org/stable/c/b4fdb3c197e35f655b2d9b6759ce29440eacdfdaCVE reference, Linux
- https://git.kernel.org/stable/c/7d5a7dd5a35876f0ecc286f3602a88887a788217CVE 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.