CVE-2022-49569
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.
Does this matter?
Lower severity and a low EPSS score (0.26%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.26% probability · 17th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/49ffa473218012e765682343de2052eb4c1f06a7Patch
- https://git.kernel.org/stable/c/4ceaa684459d414992acbefb4e4c31f2dfc50641Patch
- https://git.kernel.org/stable/c/58466e05390043d2805685c70f55f3f59711bdf2Patch
- https://git.kernel.org/stable/c/684896e675edd8b669fd3e9f547c5038222d85bcPatch
- https://git.kernel.org/stable/c/76668d2a2f367d25ff448e6d7087406af7d7bb2bPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.