block: skip sync_blockdev() on surprise removal in bdev_mark_dead()

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SUSE CVE-2026-64326

In the Linux kernel, the following vulnerability has been resolved: block: skip syncblockdev on surprise removal in bdevmarkdead bdevmarkdead's @surprise == true means the device is already gone. The filesystem callback fsbdevmarkdead honours this and skips syncfilesystem, but the bare block devi...

AZL-93458 CVE-2026-64326 affecting package kernel for versions less than 6.6.145.2-1

In the Linux kernel, the following vulnerability has been resolved: block: skip syncblockdev on surprise removal in bdevmarkdead bdevmarkdead's @surprise == true means the device is already gone. The filesystem callback fsbdevmarkdead honours this and skips syncfilesystem, but the bare block devi...

CVE-2026-64326

CVE-2026-64326 is a denial-of-service flaw in the Linux kernel's block subsystem . When bdev_mark_dead() is called with surprise == true (device already gone), the bare block-device path unconditionally invokes sync_blockdev(), which can hang indefinitely in folio_wait_writeback() waiting on I/O ...

CVE-2026-64326: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: block: skip syncblockdev on surprise removal in bdevmarkdead bdevmarkdead's @surprise == true means the device is already gone. The filesystem callback fsbdevmarkdead honours this and skips syncfilesystem, but the bare block devi...