Common vulnerabilities and Exposures (CVE)

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Required CVE Record Information

Description

In the Linux kernel, the following vulnerability has been resolved: tcp: add accessors to read/set tp->snd_cwnd We had various bugs over the years with code breaking the assumption that tp->snd_cwnd is greater than zero. Lately, syzbot reported the WARN_ON_ONCE(!tp->prior_cwnd) added in commit 8b8a321ff72c ("tcp: fix zero cwnd in tcp_cwnd_reduction") can trigger, and without a repro we would have to spend considerable time finding the bug. Instead of complaining too late, we want to catch where and when tp->snd_cwnd is set to an illegal value.

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Versions 4 Total

Default Status: unaffected

affected

  • affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 3308676ec525901bf1656014003c443a60730a04 
  • affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 5aba0ad44fb4a7fb78c5076c313456de199a3c29 
  • affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 41e191fe72282e193a7744e2fc1786b23156c9e4 
  • affected from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 40570375356c874b1578e05c1dcc3ff7c1322dbe 

Versions 4 Total

Default Status: affected

unaffected

  • unaffected from 5.15.47 through 5.15.* 
  • unaffected from 5.17.15 through 5.17.* 
  • unaffected from 5.18.4 through 5.18.* 
  • unaffected from 5.19