Security readout for executives and security teams
Plain-English summary
A Linux kernel flaw in the AMD display subsystem can corrupt memory when an array index falls outside its valid range. Exploitation requires local, low-privileged access, but successful abuse could compromise confidentiality, integrity, and availability. Systems without the affected AMD display code in use are less likely to be exposed.
Executive priority
Treat as a high-priority endpoint and workstation patching issue, especially where AMD graphics and untrusted local access coexist. It is not supported as an internet-wide emergency because the documented vector is local and active exploitation is unconfirmed.
Technical view
CVE-2024-56784 is a CWE-787 out-of-bounds write in drm/amd/display. Missing array-index validation can cause kernel memory corruption. The supplied CVSS 3.1 score is 7.8 with local access, low complexity, low privileges, no user interaction, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is most likely on systems running an affected Linux kernel with the AMD display subsystem present or active and accessible to local users. The supplied affected-version data names 6.11, 6.12.5, and 6.13, but does not provide sufficiently clear range boundaries; confirm applicability with distribution guidance.
Exploitation context
The supplied record does not list this CVE in CISA KEV and provides no evidence of active exploitation or a public exploit. The local, low-privilege attack vector limits remote exposure, but kernel memory corruption makes successful exploitation potentially severe.
Researcher notes
The remediation adds array-index bounds checks, but the bundle does not identify the vulnerable function, reachable interface, exploitation prerequisites beyond CVSS, or precise fixed release boundaries. The version data is ambiguous, so researchers and vulnerability managers should correlate the stable commits with distribution-specific kernel packages before declaring exposure or remediation.
Mitigation direction
- Inventory Linux kernel versions and identify systems using AMD display hardware or drivers.
- Apply a vendor-supported kernel update incorporating the referenced stable fixes.
- Prioritize shared workstations and systems where untrusted users have local accounts.
- Restrict unnecessary local access while updates are pending.
- Reboot updated systems so the corrected kernel becomes active.
Validation and detection
- Confirm the running kernel version after installation and reboot.
- Check distribution advisories or package changelogs for CVE-2024-56784 coverage.
- Verify whether the referenced stable fix is included in deployed kernel builds.
- Identify hosts where the AMD display subsystem is loaded or used.
- Review kernel and display logs for continuing memory or DRM faults.
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-787: 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-2024-56784 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
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: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
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/dff526dc3e27f5484f5ba11471b9fbbe681467f2CVE reference, Linux
- https://git.kernel.org/stable/c/2c437d9a0b496168e1a1defd17b531f0a526dbe9CVE 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.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.