CVE-2024-35793
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…
Does this matter?
Lower severity and a low EPSS score (0.18%). Track it; it rarely justifies an emergency change on its own.
Description
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 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.18% probability · 8th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-667
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/3d08cca5fd0aabb62b7015067ab40913b33da906Patch
- https://git.kernel.org/stable/c/952c3fce297f12c7ff59380adb66b564e2bc9b64Patch
- https://git.kernel.org/stable/c/e88b5ae01901c4a655a53158397746334778a57bPatch
- https://git.kernel.org/stable/c/3d08cca5fd0aabb62b7015067ab40913b33da906Patch
- https://git.kernel.org/stable/c/952c3fce297f12c7ff59380adb66b564e2bc9b64Patch
- https://git.kernel.org/stable/c/e88b5ae01901c4a655a53158397746334778a57bPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.