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

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-04-17 · updated 2026-10-30
Weakness: CWE-908

Description

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

Affected products

Linux kernel: from 4.15 before 6.6.55; from 6.7 before 6.7.11; from 6.8 before 6.8.2 — fixed in 6.6.55, 6.7.11, 6.8.2
Linux: 4.15 — fixed in 6.9

How to fix

Upgrade to a fixed version: Linux kernel 6.6.55, 6.7.11, 6.8.2; Linux 6.9. Check the vendor advisory for mitigations.

References

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