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CVE Record

CVE-2024-26823: irqchip/gic-v3-its: Restore quirk probing for ACPI-based systems

In the Linux kernel, the following vulnerability has been resolved: irqchip/gic-v3-its: Restore quirk probing for ACPI-based systems While refactoring the way the ITSs are probed, the handling of quirks applicable to ACPI-based platforms was lost. As a result, systems such as HIP07 lose their GICv4 functionnality, and some other may even fail to boot, unless they are configured to boot with DT. Move the enabling of quirks into its_probe_one(), making it common to all firmware implementations.

HighCVSS 7.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A Linux kernel regression can disable GICv4 functionality or prevent some ARM systems from booting when they use ACPI firmware. HIP07 is specifically identified. The issue is serious for matching hardware but does not appear broadly applicable to ordinary Linux servers or endpoints.

Executive priority

Treat as high priority for confirmed ACPI-based GICv3 ITS systems because affected machines may lose functionality or fail to boot. Use targeted remediation rather than fleetwide emergency action. Schedule controlled kernel updates with rollback readiness, especially for critical ARM infrastructure.

Technical view

A refactor of GICv3 ITS probing omitted platform-quirk detection for ACPI-based systems. The resolution moves quirk enablement into its_probe_one(), making it common across firmware implementations. The bundle identifies affected Linux 6.6–6.8-era versions, but its version data is ambiguous; confirm exact fixed releases with the kernel or distribution vendor.

Likely exposure

Exposure is concentrated in Linux systems using ARM GICv3 ITS hardware and ACPI-based boot. HIP07 platforms are explicitly affected. Device Tree-booted configurations may avoid the regression. Asset-specific firmware, architecture, kernel, and vendor-backport information is required to determine actual exposure.

Exploitation context

The CVE is not listed as KEV, and the supplied sources provide no evidence of active exploitation or a public exploit. Although the supplied CVSS vector describes local, low-complexity, low-privilege impact, the narrative primarily documents lost interrupt-controller functionality and boot failure rather than a demonstrated attack path.

Researcher notes

The source describes a regression restored by three stable commits. Its affected-version array is not sufficiently clear to derive precise ranges safely. The stated confidentiality and integrity impacts are not explained by the narrative, so avoid assuming privilege escalation or data compromise without additional vendor evidence.

Mitigation direction

  • Install a vendor-supported kernel containing the applicable stable fix.
  • Confirm exact fixed versions and backports with the Linux distribution or hardware vendor.
  • Prioritize systems using ACPI, GICv3 ITS, or HIP07 hardware.
  • Consider Device Tree boot only when supported and operationally validated.
  • Test boot and interrupt functionality before broad production rollout.

Validation and detection

  • Inventory ARM systems, kernel builds, firmware mode, and interrupt-controller hardware.
  • Determine whether each system boots through ACPI or Device Tree.
  • Check vendor changelogs for the referenced stable commits or equivalent backports.
  • Reboot updated representative systems and verify successful startup.
  • Confirm expected GICv4 and interrupt functionality after remediation.
Prepared
Confidence
high
Sources
5

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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CVE-2024-26823 mapping review

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Vulnerability profileCVE Program record
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

Official CVE source material

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.

1CVSS vectors
3Timeline events
2ADP providers
4Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

CVSS vector scores

1 official score

We 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.

ScoreVersionSeverityVectorExploitImpactSource
7.8CVSS 3.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9Linux

Vulnerability scoring details

Base CVSS 3.1 score

7.8High
CVSS 3.1 vector shape for CVE-2024-26823Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CVECVE Program Container
CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux9585a495ac936049dba141e8f9d99159ca06d46a, 9585a495ac936049dba141e8f9d99159ca06d46a, 9585a495ac936049dba141e8f9d99159ca06d46aunaffected
LinuxLinux6.6, 0, 6.6.18, 6.7.6, 6.8affected
Weakness

CWE details

No CWE listed

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