CVE-2022-49569
spi: bcm2835: bcm2835_spi_handle_err(): fix NULL pointer deref for non DMA transfers
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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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://git.kernel.org/stable/c/49ffa473218012e765682343de2052eb4c1f06a7
- https://git.kernel.org/stable/c/4ceaa684459d414992acbefb4e4c31f2dfc50641
- https://git.kernel.org/stable/c/58466e05390043d2805685c70f55f3f59711bdf2
- https://git.kernel.org/stable/c/684896e675edd8b669fd3e9f547c5038222d85bc
- https://git.kernel.org/stable/c/76668d2a2f367d25ff448e6d7087406af7d7bb2b
References (5)
SSVC — Action Prioritization
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Quick Info
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