In the Linux kernel, the following vulnerability has been resolved:
blk-wbt: remove WARN_ON_ONCE from wbt_init_enable_default()
wbt_init_enable_default() uses WARN_ON_ONCE to check for failures from
wbt_alloc() and wbt_init(). However, both are expected failure paths:
- wbt_alloc() can return NULL under memory pressure (-ENOMEM)
- wbt_init() can fail with -EBUSY if wbt is already registered
syzbot triggers this by injecting memory allocation failures during MTD
partition creation via ioctl(BLKPG), causing a spurious warning.
wbt_init_enable_default() is a best-effort initialization called from
blk_register_queue() with a void return type. Failure simply means the
disk operates without writeback throttling, which is harmless.
Replace WARN_ON_ONCE with plain if-checks, consistent with how
wbt_set_lat() in the same file already handles these failures. Add a
pr_warn() for the wbt_init() failure to retain diagnostic information
without triggering a full stack trace.
References
Configurations
History
06 Jul 2026, 20:12
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/e9b004ff83067cdf96774b45aea4b239ace99a2f - Patch | |
| References | () https://git.kernel.org/stable/c/fd7a982657077469802594a5165bc30b9a55af70 - Patch | |
| First Time |
Linux linux Kernel
Linux |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CWE | CWE-617 | |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
26 Jun 2026, 20:17
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-06-26 20:17
Updated : 2026-07-06 20:12
NVD link : CVE-2026-53319
Mitre link : CVE-2026-53319
CVE.ORG link : CVE-2026-53319
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-617
Reachable Assertion