CVE-2022-49569

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinux1513ceee70f2bd523e025efe0c715328e1a43ffd < 76668d2a2f367d25ff448e6d7087406af7d7bb2baffected
LinuxLinux1513ceee70f2bd523e025efe0c715328e1a43ffd < 684896e675edd8b669fd3e9f547c5038222d85bcaffected
LinuxLinux1513ceee70f2bd523e025efe0c715328e1a43ffd < 58466e05390043d2805685c70f55f3f59711bdf2affected
LinuxLinux1513ceee70f2bd523e025efe0c715328e1a43ffd < 49ffa473218012e765682343de2052eb4c1f06a7affected
LinuxLinux1513ceee70f2bd523e025efe0c715328e1a43ffd < 4ceaa684459d414992acbefb4e4c31f2dfc50641affected
LinuxLinux5.4affected
LinuxLinux0 < 5.4unaffected
LinuxLinux5.4.208 <= 5.4.*unaffected
LinuxLinux5.10.134 <= 5.10.*unaffected
LinuxLinux5.15.58 <= 5.15.*unaffected
LinuxLinux5.18.15 <= 5.18.*unaffected
LinuxLinux5.19 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References