Overview
About vulnerability
In the Linux kernel, the following vulnerability has been resolved: block: fix memory leak in __blkdev_issue_zero_pages Move the fatal signal check before bio_alloc() to prevent a memory leak when BLKDEV_ZERO_KILLABLE is set and a fatal signal is pending. Previously, the bio was allocated before checking for a fatal signal. If a signal was pending, the code would break out of the loop without freeing or chaining the just-allocated bio, causing a memory leak. This matches the pattern already used in __blkdev_issue_write_zeroes() where the signal check precedes the allocation. A flaw was found in the Linux kernel. A local user could trigger a memory leak in the__blkdev_issue_zero_pages function within the block subsystem. This occurs when a fatal signal is pending and a block I/O (bio) is allocated but not properly freed, leading to resource exhaustion. This vulnerability can result in a Denial of Service (DoS).
Details
KernelCare state
Live-patch status from KernelCare for each operating system.
| Operating system | Status | Covered kernels |
|---|---|---|
| Debian 13 | Will Not Fix | — |