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CVE PROGRAM SOURCE RECORD8.1 High

CVE-2026-98130

sctp: fix a TOCTOU race in SCTP_CMD_TIMER_START

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: sctp: fix a TOCTOU race in SCTP_CMD_TIMER_START The SCTP_CMD_TIMER_START handler checks timer_pending() before calling timer_reduce(). The timer can expire and detach between these operations, causing timer_reduce() to rearm the timer without taking the association reference required for the newly armed timer. The timer callback later unconditionally drops its association reference, which can leave the association reference count unbalanced and result in use-after-free during association teardown. Use the return value of timer_reduce() to determine whether the timer was actually armed. Take the association reference only when timer_reduce() successfully starts a new timer, closing the race between checking the timer state and rearming it. This issue was reported by Nico Yip (@_cyeaa_) working with TrendAI Zero Day Initiative.

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

  • 20a785aa52c82246055a089e55df9dac47d67da1 to < cbf2df9aac4202f9fb0b361a7fe8c79b29fad92caffected
  • 20a785aa52c82246055a089e55df9dac47d67da1 to < 3205a20f837f5b1f009427ac3d9f706bf8a6fbecaffected
  • 20a785aa52c82246055a089e55df9dac47d67da1 to < 755d70ca845fd9b87c7b338ae6ae832b08cd0005affected
  • 20a785aa52c82246055a089e55df9dac47d67da1 to < 09e7f9290d63178f56095d5c18fb9f9470153db5affected
  • 20a785aa52c82246055a089e55df9dac47d67da1 to < e42ba56281ca3ae2dcb3558bebee9a1c9a4831d9affected
  • 20a785aa52c82246055a089e55df9dac47d67da1 to < 00b841bac10230c557be6b38efc48508198fe23eaffected
  • 20a785aa52c82246055a089e55df9dac47d67da1 to < 3d698d1e6c8bc41e3e1707777a016f1bdd07842daffected
  • 20a785aa52c82246055a089e55df9dac47d67da1 to < 2188569e7e1b0bc3f3b557dc97ab7a02befc11c8affected
  • 9c0a4652f750afe3b4468cbcd9335b244ce2facdaffected
  • 70989e501fbce502198d82da88358ce453575a05affected
  • 085bb270b4b1168c93afb37bbafc881207d15443affected
  • 4.19.126 to < 4.20affected
  • 5.4.44 to < 5.5affected
  • 5.6.16 to < 5.7affected

Linux Linux

Default version status: affected

  • 5.7affected
  • 0 to < 5.7unaffected
  • 5.10.271 to ≤ 5.10.*unaffected
  • 5.15.222 to ≤ 5.15.*unaffected
  • 6.1.189 to ≤ 6.1.*unaffected
  • 6.6.158 to ≤ 6.6.*unaffected
  • 6.12.111 to ≤ 6.12.*unaffected
  • 6.18.53 to ≤ 6.18.*unaffected
  • 7.2.7 to ≤ 7.2.*unaffected
  • 7.3 to ≤ *unaffected

References