Premature Release of Resource During Expected Lifetime Affecting kernel-zfcpdump package, versions *
Threat Intelligence
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Test your applications- Snyk IDSNYK-CENTOS10-KERNELZFCPDUMP-18041885
- published21 Jul 2026
- disclosed20 Jul 2026
Introduced: 20 Jul 2026
NewCVE-2026-64205 (opens in a new tab)How to fix?
There is no fixed version for Centos:10 kernel-zfcpdump.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-zfcpdump package and not the kernel-zfcpdump package as distributed by Centos.
See How to fix? for Centos:10 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
i2c: i801: fix hardware state machine corruption in error path
A severe livelock and subsequent Hung Task panic were observed in the i2c-i801 driver during concurrent Fuzzing. The crash is caused by an unconditional hardware register cleanup in the error handling path of i801_access().
When i801_check_pre() fails (e.g., returning -EBUSY because the SMBus controller is actively used by BIOS/ACPI), the kernel does not actually acquire the hardware ownership. However, the code jumps to the 'out' label and executes:
iowrite8(SMBHSTSTS_INUSE_STS | STATUS_FLAGS, SMBHSTSTS(priv));
This forcefully clears the INUSE_STS lock and resets the hardware status flags without owning the controller. Doing so interrupts ongoing BIOS/ACPI transactions and totally corrupts the SMBus hardware state machine.
Consequently, all subsequent i801_access() calls fail at the pre-check stage, triggering an endless stream of "SMBus is busy, can't use it!" error logs. Over a slow serial console, this printk flood monopolizes the CPU (Console Livelock), starving other processes trying to acquire the mmap_lock down_read semaphore, ultimately triggering the hung task watchdog.
Fix this by moving the 'out' label below the hardware register cleanup. If i801_check_pre() fails, we safely bypass the iowrite8() and only release the software locks (pm_runtime and mutex), strictly adhering to the rule of not releasing resources that were never acquired.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2502895
- https://access.redhat.com/security/cve/CVE-2026-64205
- https://git.kernel.org/stable/c/00904687b9c5527d569d9a1ca72119823e735a61
- https://git.kernel.org/stable/c/10dd1a736d557e310a77117832874729a0175d57
- https://git.kernel.org/stable/c/bb5133a7d5f3fe5c387770e25f2e00e682ce11ed