Security readout for executives and security teams
Plain-English summary
This is a GRUB2 bootloader flaw in HFS+ filesystem handling. A failed mount path can mishandle internal state and lead to a NULL pointer access, creating an availability risk. It is not reported as remotely exploitable and requires high privileges on the affected system.
Executive priority
Treat as a moderate operational resilience issue, not an internet-facing emergency. Patch through normal Red Hat maintenance windows, with faster handling for critical systems where bootloader availability affects recovery, uptime, or regulated operations.
Technical view
CVE-2024-45783 is a GRUB2 fs/hfs+ reference-counting error where failure to mount HFS+ does not properly set ERRNO. The source describes possible double decrement behavior leading to NULL pointer access. CVSS 3.1 is 4.4: local attack vector, low complexity, high privileges, and high availability impact only.
Likely exposure
Primary exposure is Red Hat Enterprise Linux 9 with affected grub2 package data and Red Hat OpenShift Container Platform 4 through RHCOS. Red Hat lists RHEL 10 as unaffected, while RHEL 7 and 8 status is unknown in the provided data.
Exploitation context
The CVE is not in CISA KEV in the source bundle, and no cited source states active exploitation. Practical risk is constrained by local access and high privilege requirements, but impact may matter on systems where boot reliability is operationally critical.
Researcher notes
Evidence supports a local, high-privilege GRUB2 HFS+ failure-path availability flaw. The provided data does not establish exploit activity, confidentiality impact, integrity impact, or non-Red Hat affected products beyond the generic grub2 package entry.
Mitigation direction
- Apply Red Hat guidance and RHSA-2025:6990 where applicable.
- Update grub2 or RHCOS through supported vendor channels.
- Track Red Hat status for RHEL 7 and RHEL 8 before assuming exposure.
- Prioritize systems where boot disruption has business impact.
Validation and detection
- Inventory Red Hat product versions and grub2 package versions.
- Check whether RHEL 9 systems include affected grub2 builds.
- Confirm OpenShift 4 RHCOS advisories and applied updates.
- Verify RHSA-2025:6990 remediation status on managed systems.
- Document RHEL 7 and 8 as unknown until vendor status is confirmed.
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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CWE-911: Exact CWE lookup
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Open ATT&CK lookupContainer behavior lookup
The affected technology mentions containers, so container-specific ATT&CK technique review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2024-45783 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
- Medium
- CVSS
- 4.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/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:H/UI:N/S:U/C:N/I:N/A:H0.83.6redhatVulnerability scoring details
Base CVSS 3.1 score
4.4MediumVector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/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.
- Source timelineredhat
Reported to Red Hat.
- Source timelineredhat
Made public.
- 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
- RHSA-2025:6990CVE reference, redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2024-45783CVE reference, redhat · vdb-entry, x_refsource_REDHAT
- RHBZ#2345863CVE reference, redhat · issue-tracking, x_refsource_REDHAT
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.
Improper Update of Reference Count
Improper Update of Reference Count represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.