{"timestamp":"2024-04-05T17:28:20.913168Z","id":"CVE-2024-26806","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}

[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["drivers/spi/spi-cadence-quadspi.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"0578a6dbfe7514db7134501cf93acc21cf13e479","lessThan":"041562ebc4759c9932b59a06527f8753b86da365","versionType":"git","status":"affected"},{"version":"0578a6dbfe7514db7134501cf93acc21cf13e479","lessThan":"959043afe53ae80633e810416cee6076da6e91c6","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["drivers/spi/spi-cadence-quadspi.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"6.7","status":"affected"},{"version":"0","lessThan":"6.7","versionType":"semver","status":"unaffected"},{"version":"6.7.9","lessThanOrEqual":"6.7.*","versionType":"semver","status":"unaffected"},{"version":"6.8","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-667

OR
          *cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:*
          *cpe:2.3:o:linux:linux_kernel:6.8:rc3:*:*:*:*:*:*
          *cpe:2.3:o:linux:linux_kernel:6.8:rc4:*:*:*:*:*:*
          *cpe:2.3:o:linux:linux_kernel:6.8:rc2:*:*:*:*:*:*
          *cpe:2.3:o:linux:linux_kernel:6.8:rc6:*:*:*:*:*:*
          *cpe:2.3:o:linux:linux_kernel:6.8:rc5:*:*:*:*:*:*
          *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.7.9

CVE: https://git.kernel.org/stable/c/041562ebc4759c9932b59a06527f8753b86da365 Types: Patch

CVE: https://git.kernel.org/stable/c/959043afe53ae80633e810416cee6076da6e91c6 Types: Patch

kernel.org: https://git.kernel.org/stable/c/041562ebc4759c9932b59a06527f8753b86da365 Types: Patch

kernel.org: https://git.kernel.org/stable/c/959043afe53ae80633e810416cee6076da6e91c6 Types: Patch

https://git.kernel.org/stable/c/041562ebc4759c9932b59a06527f8753b86da365

https://git.kernel.org/stable/c/959043afe53ae80633e810416cee6076da6e91c6

In the Linux kernel, the following vulnerability has been resolved:

spi: cadence-qspi: remove system-wide suspend helper calls from runtime PM hooks

The ->runtime_suspend() and ->runtime_resume() callbacks are not
expected to call spi_controller_suspend() and spi_controller_resume().
Remove calls to those in the cadence-qspi driver.

Those helpers have two roles currently:
 - They stop/start the queue, including dealing with the kworker.
 - They toggle the SPI controller SPI_CONTROLLER_SUSPENDED flag. It
   requires acquiring ctlr->bus_lock_mutex.

Step one is irrelevant because cadence-qspi is not queued. Step two
however has two implications:
 - A deadlock occurs, because ->runtime_resume() is called in a context
   where the lock is already taken (in the ->exec_op() callback, where
   the usage count is incremented).
 - It would disallow all operations once the device is auto-suspended.

Here is a brief call tree highlighting the mutex deadlock:

spi_mem_exec_op()
        ...
        spi_mem_access_start()
                mutex_lock(&ctlr->bus_lock_mutex)

        cqspi_exec_mem_op()
                pm_runtime_resume_and_get()
                        cqspi_resume()
                                spi_controller_resume()
                                        mutex_lock(&ctlr->bus_lock_mutex)
                ...

        spi_mem_access_end()
                mutex_unlock(&ctlr->bus_lock_mutex)
        ...

kernel.org https://git.kernel.org/stable/c/041562ebc4759c9932b59a06527f8753b86da365 [No types assigned]

kernel.org https://git.kernel.org/stable/c/959043afe53ae80633e810416cee6076da6e91c6 [No types assigned]