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CVE PROGRAM SOURCE RECORDUnscored

CVE-2021-47294

netrom: Decrease sock refcount when sock timers expire

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: netrom: Decrease sock refcount when sock timers expire Commit 63346650c1a9 ("netrom: switch to sock timer API") switched to use sock timer API. It replaces mod_timer() by sk_reset_timer(), and del_timer() by sk_stop_timer(). Function sk_reset_timer() will increase the refcount of sock if it is called on an inactive timer, hence, in case the timer expires, we need to decrease the refcount ourselves in the handler, otherwise, the sock refcount will be unbalanced and the sock will never be freed.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • ce29e8a259de767f7210d346ad2b031cb8ab2732 to < 853262355518cd1247515b74e83fabf038aa6c29affected
  • baa9e32336bf6d0d74a7c3486d2a27feaf57cd5f to < a01634bf91f2b6c42583770eb6815fb6d1e251cfaffected
  • 0adf571fa34b27bd0b97b408cc0f0dc54b72f0eb to < 48866fd5c361ea417ed24b43fc2a7dc2f5b060efaffected
  • 2c6b572458a9127e8070df13fa7f115c29ab1d92 to < 9619cc7d97c3aa8ed3cfd2b8678b74fb6d6c7950affected
  • 63346650c1a94a92be61a57416ac88c0a47c4327 to < 25df44e90ff5959b5c24ad361b648504a7e39ef3affected
  • 63346650c1a94a92be61a57416ac88c0a47c4327 to < 6811744bd0efb9e472cb15d066cdb460beb8cb8aaffected
  • 63346650c1a94a92be61a57416ac88c0a47c4327 to < bc1660206c3723c37ed4d622ad81781f1e987250affected
  • 63346650c1a94a92be61a57416ac88c0a47c4327 to < 517a16b1a88bdb6b530f48d5d153478b2552d9a8affected
  • f1d9a1f2ef6ff17293d21d5e6b80e04bea0cf508affected
  • 519e8a22a454b1f1baa3a151b184fe51bc18e178affected
  • 4.4.173 to < 4.4.277affected
  • 4.9.155 to < 4.9.277affected
  • 4.14.98 to < 4.14.241affected
  • 4.19.20 to < 4.19.199affected
  • 3.18.134 to < 3.19affected
  • 4.20.7 to < 4.21affected

Linux Linux

Default version status: affected

  • 5.0affected
  • 0 to < 5.0unaffected
  • 4.4.277 to ≤ 4.4.*unaffected
  • 4.9.277 to ≤ 4.9.*unaffected
  • 4.14.241 to ≤ 4.14.*unaffected
  • 4.19.199 to ≤ 4.19.*unaffected
  • 5.4.136 to ≤ 5.4.*unaffected
  • 5.10.54 to ≤ 5.10.*unaffected
  • 5.13.6 to ≤ 5.13.*unaffected
  • 5.14 to ≤ *unaffected

References