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CVE-2026-98130

HIGHCVSS 8.1/10

Last modified

CVE-2026-98130 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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.

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.

Metrics

CVSS 3.1
8.1/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 20a785aa52c82246055a089e55df9dac47d67da1, < e42ba56281ca3ae2dcb3558bebee9a1c9a4831d9; >= 20a785aa52c82246055a089e55df9dac47d67da1, < 00b841bac10230c557be6b38efc48508198fe23e; >= 20a785aa52c82246055a089e55df9dac47d67da1, < 3d698d1e6c8bc41e3e1707777a016f1bdd07842d; >= 20a785aa52c82246055a089e55df9dac47d67da1, < 2188569e7e1b0bc3f3b557dc97ab7a02befc11c8; 9c0a4652f750afe3b4468cbcd9335b244ce2facd; 70989e501fbce502198d82da88358ce453575a05; 085bb270b4b1168c93afb37bbafc881207d15443; >= 4.19.126, < 4.20; >= 5.4.44, < 5.5; >= 5.6.16, < 5.7
LinuxLinux5.7

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-98130?
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.
How severe is CVE-2026-98130?
CVE-2026-98130 has a CVSS score of 8.1/10 (HIGH severity).
How do I fix CVE-2026-98130?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST