Common vulnerabilities and Exposures (CVE)

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Required CVE Record Information

Description

In the Linux kernel, the following vulnerability has been resolved: udmabuf: validate ubuf->pagecount Syzbot has reported GPF in sg_alloc_append_table_from_pages(). The problem was in ubuf->pages == ZERO_PTR. ubuf->pagecount is calculated from arguments passed from user-space. If user creates udmabuf with list.size == 0 then ubuf->pagecount will be also equal to zero; it causes kmalloc_array() to return ZERO_PTR. Fix it by validating ubuf->pagecount before passing it to kmalloc_array().

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Versions 6 Total

Default Status: unaffected

affected

  • affected from fbb0de795078190a9834b3409e4b009cfb18a6d4 before 5d50f851dd307c07ca5591297093f19967c834a9 
  • affected from fbb0de795078190a9834b3409e4b009cfb18a6d4 before b267a8118c2b171bf7d67b90ed64154eeab9fae0 
  • affected from fbb0de795078190a9834b3409e4b009cfb18a6d4 before 811b667cefbea9cb7511a874b169d6a92907137e 
  • affected from fbb0de795078190a9834b3409e4b009cfb18a6d4 before a3728d32fc61eb0fe283cb8ff60b2c8f751e2202 
  • affected from fbb0de795078190a9834b3409e4b009cfb18a6d4 before 9e9b4a269f84d3230f2af84ff42322db676440d9 
  • affected from fbb0de795078190a9834b3409e4b009cfb18a6d4 before 2b6dd600dd72573c23ea180b5b0b2f1813405882 

Versions 8 Total

Default Status: affected

affected

  • affected at 4.20 

unaffected

  • unaffected from 0 before 4.20 
  • unaffected from 5.4.189 through 5.4.* 
  • unaffected from 5.10.110 through 5.10.* 
  • unaffected from 5.15.33 through 5.15.* 
  • unaffected from 5.16.19 through 5.16.* 
  • unaffected from 5.17.2 through 5.17.* 
  • unaffected from 5.18