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CVE Record

CVE-2024-26876: drm/bridge: adv7511: fix crash on irq during probe

In the Linux kernel, the following vulnerability has been resolved: drm/bridge: adv7511: fix crash on irq during probe Moved IRQ registration down to end of adv7511_probe(). If an IRQ already is pending during adv7511_probe (before adv7511_cec_init) then cec_received_msg_ts could crash using uninitialized data: Unable to handle kernel read from unreadable memory at virtual address 00000000000003d5 Internal error: Oops: 96000004 [#1] PREEMPT_RT SMP Call trace: cec_received_msg_ts+0x48/0x990 [cec] adv7511_cec_irq_process+0x1cc/0x308 [adv7511] adv7511_irq_process+0xd8/0x120 [adv7511] adv7511_irq_handler+0x1c/0x30 [adv7511] irq_thread_fn+0x30/0xa0 irq_thread+0x14c/0x238 kthread+0x190/0x1a8

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2024-26876 is a Linux kernel driver flaw that can crash a system during startup or device probing. It affects systems using the ADV7511 display bridge driver when an interrupt arrives before related CEC data is initialized. The main business risk is availability loss on affected Linux-based devices, not confirmed remote compromise.

Executive priority

Treat this as normal-priority kernel maintenance unless affected devices provide critical display or appliance functions. Escalate for embedded fleets where an unexpected kernel crash would cause service disruption or manual recovery.

Technical view

The ADV7511 DRM bridge driver registered its IRQ before adv7511_cec_init completed. A pending IRQ during adv7511_probe could reach adv7511_cec_irq_process and cec_received_msg_ts with uninitialized data, causing a kernel Oops. The upstream fix moves IRQ registration to the end of probe.

Likely exposure

Exposure appears limited to Linux systems that include and initialize the ADV7511 bridge driver, commonly embedded or display-focused devices. The source bundle lists affected Linux versions from 4.15 through fixed stable releases, but product-level distribution impact is not provided.

Exploitation context

The provided sources do not show active exploitation, public exploit code, or CISA KEV listing. The described trigger is a pending hardware interrupt during driver probe, so exploitation evidence is incomplete and appears operationally narrower than typical remote kernel bugs.

Researcher notes

This is a driver initialization ordering bug, not a documented privilege escalation. The affected-version data is broad and partly commit-based, so validation should focus on kernel source, vendor backports, and actual ADV7511 driver use.

Mitigation direction

  • Update to a kernel or vendor package containing the ADV7511 IRQ registration fix.
  • Check Linux distribution or device vendor advisories for backported fixed builds.
  • Prioritize embedded, appliance, or display systems using the ADV7511 bridge driver.
  • If patching is delayed, review vendor guidance for disabling unused ADV7511 or CEC functionality.

Validation and detection

  • Inventory systems running affected Linux kernel versions and ADV7511 driver support.
  • Confirm whether hardware or device trees initialize the ADV7511 bridge driver.
  • Verify the deployed kernel includes one of the cited stable fixes or vendor backport.
  • Review kernel logs for Oops traces involving adv7511_irq_handler or cec_received_msg_ts.
Prepared
Confidence
medium
Sources
6

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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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
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.

0CVSS vectors
3Timeline events
2ADP providers
5Source links

SSVC decision data

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

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

CISA-ADPCISA ADP Vulnrichment
other:ssvc
CVECVE Program Container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux3b1b975003e4a3da4b93ab032487a3ae4afca7b5, 3b1b975003e4a3da4b93ab032487a3ae4afca7b5, 3b1b975003e4a3da4b93ab032487a3ae4afca7b5, 3b1b975003e4a3da4b93ab032487a3ae4afca7b5unaffected
LinuxLinux4.15, 0, 6.6.55, 6.7.11, 6.8.2, 6.9affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.