Security readout for executives and security teams
Plain-English summary
A Linux AMD display-driver flaw can use a negative array index when no timing generators are available. The published severity is high because a locally authenticated attacker may potentially affect confidentiality, integrity, and availability. The supplied evidence does not establish real-world exploitation.
Executive priority
Treat as a high-priority maintenance issue, especially on shared Linux workstations or systems allowing untrusted local access. It is not supported as an internet-scale emergency: the attack vector is local, KEV is false, and active exploitation is not evidenced. Apply vendor-supported kernel updates through normal accelerated patching.
Technical view
In drm/amd/display, tg_inst can become negative when timing_generator_count is zero and then be used as an array index. The kernel fix checks the count before use, addressing two Coverity-reported overrun findings. CVSS 3.1 is 7.8: local access, low complexity, low privileges, no user interaction, and potentially high impact.
Likely exposure
Exposure is limited to Linux systems using the affected AMD display code. The source bundle lists versions from 4.15 through 6.10.9 and 6.11 as affected, but distribution backports may change actual status. Systems without the relevant AMD display path are less likely to be exposed.
Exploitation context
The CVSS vector requires local access and low privileges. CISA KEV status is false, and the supplied sources provide no evidence of active exploitation or a public exploit. The issue was identified as two overrun findings by Coverity, so practical exploitability is not demonstrated here.
Researcher notes
The defect is a possible negative-index array access caused by timing_generator_count equaling zero. Two stable-kernel commits are referenced. No CWE is assigned in the bundle, and the evidence does not describe a trigger, confirmed crash, information disclosure, privilege escalation, or working exploit. Exact exposure requires kernel configuration and backport analysis.
Mitigation direction
- Install a supported kernel or distribution package containing the referenced upstream stable fix.
- Check distribution security guidance because vendors may backport fixes without changing the apparent kernel version.
- Prioritize affected systems that allow untrusted local users or workloads.
Validation and detection
- Inventory Linux kernel versions and identify systems using the AMD display driver.
- Confirm patch status through distribution advisories or package changelogs, accounting for backports.
- Verify the installed source includes the timing_generator_count check from the referenced stable fix.
- Reassess locally accessible multi-user systems first.
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
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ATT&CK lookup starting points
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CVE-2024-46730 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
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/a64284b9e1999ad5580debced4bc6d6adb28aad4CVE reference, Linux
- https://git.kernel.org/stable/c/687fe329f18ab0ab0496b20ed2cb003d4879d931CVE 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.