In the Linux kernel, the following vulnerability has been resolved:
debugfs: fix wait/cancellation handling during remove
Ben Greear further reports deadlocks during concurrent debugfs remove while files are being accessed, even though the code in question now uses debugfs cancellations. Turns out that despite all the review on the locking, we missed completely that the logic is wrong: if the refcount hits zero we can finish (and need not wait for the completion), but if it doesn't we have to trigger all the cancellations. As written, we can _never_ get into the loop triggering the cancellations. Fix this, and explain it better while at it.
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jul 27, 2026 | Jul 27, 2026 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | May 17, 2024 |
| Ubuntu | — | Upgrade linux-image-6.8.0-35-lowlatencyUpgrade linux-image-oracleUpgrade linux-image-6.8.0-1006-ibmUpgrade linux-image-6.8.0-1005-raspiUpgrade linux-image-raspiUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-6.8.0-1008-gcpUpgrade linux-image-gkeUpgrade linux-image-genericUpgrade linux-image-6.8.0-1006-oracle-64kUpgrade linux-image-azure-fdeUpgrade linux-image-6.8.0-35-generic-64kUpgrade linux-image-lowlatencyUpgrade linux-image-generic-lpaeUpgrade linux-image-azureUpgrade linux-image-6.8.0-35-genericUpgrade linux-image-6.8.0-1008-azureUpgrade linux-image-lowlatency-64kUpgrade linux-image-oem-24.04Upgrade linux-image-virtual-hwe-24.04Upgrade linux-image-6.8.0-35-lowlatency-64kUpgrade linux-image-kvmUpgrade linux-image-ibmUpgrade linux-image-awsUpgrade linux-image-virtualUpgrade linux-image-oracle-64kUpgrade linux-image-6.8.0-1006-oracleUpgrade linux-image-oem-24.04aUpgrade linux-image-ibm-lts-24.04Upgrade linux-image-6.8.0-1009-awsUpgrade linux-image-ibm-classicUpgrade linux-image-6.8.0-1004-gkeUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-6.8.0-1008-azure-fdeUpgrade linux-image-6.8.0-1006-oemUpgrade linux-image-generic-64kUpgrade linux-image-gcp | Jul 1, 2024 | May 17, 2024 |
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