In the Linux kernel, the following vulnerability has been resolved:
fbnic: close fw_log race between users and teardown
Fixes a theoretical race on fw_log between the teardown path and fw_log
write functions.
fw_log is written inside fbnic_fw_log_write() and can be reached from
the mailbox handler fbnic_fw_msix_intr(), but fw_log is freed before
IRQ/MBX teardown during cleanup, resulting in a potential data race of
dereferencing a freed/null variable.
Possible Interleaving Scenario:
CPU0: fbnic_fw_msix_intr() // Entry
fbnic_fw_log_write()
if (fbnic_fw_log_ready()) // true
... preempt ...
CPU1: fbnic_remove() // Entry
fbnic_fw_log_free()
vfree(log->data_start);
log->data_start = NULL;
CPU0: continues, walks log->entries or writes to log->data_start
The initialization also has an incorrect order problem, as the fw_log
is currently allocated after MBX setup during initialization.
Fix the problems by adjusting the synchronization order to put
initialization in place before the mailbox is enabled, and not cleared
until after the mailbox has been disabled.
References
Configurations
Configuration 1 (hide)
|
History
16 Jun 2026, 02:40
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Linux linux Kernel
Linux |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| References | () https://git.kernel.org/stable/c/223cfef4812bdfa5ac5c1aa761cdba03cfe2c9cd - Patch | |
| References | () https://git.kernel.org/stable/c/5f10ab3643c58a22fbaee92c4701b00fcb4a465d - Patch | |
| References | () https://git.kernel.org/stable/c/ee5492fd88cfc079c19fbeac78e9e53b7f6c04f3 - Patch | |
| CWE | NVD-CWE-noinfo |
27 May 2026, 14:17
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-27 14:17
Updated : 2026-06-17 10:52
NVD link : CVE-2026-45977
Mitre link : CVE-2026-45977
CVE.ORG link : CVE-2026-45977
JSON object : View
Products Affected
linux
- linux_kernel
CWE