CVE-2022-49569

spi: bcm2835: bcm2835_spi_handle_err(): fix NULL pointer deref for non DMA transfers

Description

In the Linux kernel, the following vulnerability has been resolved: spi: bcm2835: bcm2835_spi_handle_err(): fix NULL pointer deref for non DMA transfers In case a IRQ based transfer times out the bcm2835_spi_handle_err() function is called. Since commit 1513ceee70f2 ("spi: bcm2835: Drop dma_pending flag") the TX and RX DMA transfers are unconditionally canceled, leading to NULL pointer derefs if ctlr->dma_tx or ctlr->dma_rx are not set. Fix the NULL pointer deref by checking that ctlr->dma_tx and ctlr->dma_rx are valid pointers before accessing them.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.02%
Affected: Linux Linux
Affected: Linux Linux
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/stable/c/76668d2a2f367d25ff448e6d7087406af7d7bb2b patch
https://git.kernel.org/stable/c/684896e675edd8b669fd3e9f547c5038222d85bc patch
https://git.kernel.org/stable/c/58466e05390043d2805685c70f55f3f59711bdf2 patch
https://git.kernel.org/stable/c/49ffa473218012e765682343de2052eb4c1f06a7 patch
https://git.kernel.org/stable/c/4ceaa684459d414992acbefb4e4c31f2dfc50641 patch

Frequently Asked Questions

What is the severity of CVE-2022-49569?
CVE-2022-49569 has been scored as a medium severity vulnerability.
How to fix CVE-2022-49569?
To fix CVE-2022-49569, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-49569 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-49569 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-49569?
CVE-2022-49569 affects Linux Linux, Linux Linux.
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