CVE-2026-98130
sctp: fix a TOCTOU race in SCTP_CMD_TIMER_START
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.
INFO
Published Date :
Sept. 25, 2026, 11:17 a.m.
Last Modified :
Oct. 22, 2026, 3:26 p.m.
Remotely Exploit :
Yes !
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
Solution
- Use timer_reduce return value to check timer arming.
- Take association reference only when timer starts.
- Update the Linux kernel to the patched version.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-98130.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-98130 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-98130
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-98130 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-98130 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Oct. 22, 2026
Action Type Old Value New Value Added CWE CWE-362 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:5.7:rc7:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:5.7:-:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.2.7 *cpe:2.3:o:linux:linux_kernel:7.3:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.53 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.19.126 up to (excluding) 4.20 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.4.44 up to (excluding) 5.5 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.6.16 up to (excluding) 5.7 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.111 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.222 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.158 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.7.1 up to (excluding) 5.10.271 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.189 Added Reference Type kernel.org: https://git.kernel.org/stable/c/00b841bac10230c557be6b38efc48508198fe23e Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/09e7f9290d63178f56095d5c18fb9f9470153db5 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/2188569e7e1b0bc3f3b557dc97ab7a02befc11c8 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/3205a20f837f5b1f009427ac3d9f706bf8a6fbec Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/3d698d1e6c8bc41e3e1707777a016f1bdd07842d Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/755d70ca845fd9b87c7b338ae6ae832b08cd0005 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/cbf2df9aac4202f9fb0b361a7fe8c79b29fad92c Types: Patch Changed Reference Type nvd-ai-agent-0.4.0-gemma-4-31B-it: https://git.kernel.org/stable/c/00b841bac10230c557be6b38efc48508198fe23e Types: Broken Link nvd-ai-agent-0.4.0-gemma-4-31B-it: https://git.kernel.org/stable/c/00b841bac10230c557be6b38efc48508198fe23e Types: Broken Link, Patch Changed Reference Type nvd-ai-agent-0.4.0-gemma-4-31B-it: https://git.kernel.org/stable/c/2188569e7e1b0bc3f3b557dc97ab7a02befc11c8 Types: Broken Link nvd-ai-agent-0.4.0-gemma-4-31B-it: https://git.kernel.org/stable/c/2188569e7e1b0bc3f3b557dc97ab7a02befc11c8 Types: Broken Link, Patch Changed Reference Type nvd-ai-agent-0.4.0-gemma-4-31B-it: https://git.kernel.org/stable/c/3d698d1e6c8bc41e3e1707777a016f1bdd07842d Types: Broken Link nvd-ai-agent-0.4.0-gemma-4-31B-it: https://git.kernel.org/stable/c/3d698d1e6c8bc41e3e1707777a016f1bdd07842d Types: Broken Link, Patch Changed Reference Type nvd-ai-agent-0.4.0-gemma-4-31B-it: https://git.kernel.org/stable/c/e42ba56281ca3ae2dcb3558bebee9a1c9a4831d9 Types: Permissions Required nvd-ai-agent-0.4.0-gemma-4-31B-it: https://git.kernel.org/stable/c/e42ba56281ca3ae2dcb3558bebee9a1c9a4831d9 Types: Patch, Permissions Required Added Reference Type kernel.org: https://git.kernel.org/stable/c/e42ba56281ca3ae2dcb3558bebee9a1c9a4831d9 Types: Patch -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Oct. 19, 2026
Action Type Old Value New Value Added Affected Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/98xxx/CVE-2026-98130.json">CVE-2026-98130</a> -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Oct. 03, 2026
Action Type Old Value New Value Added Affected Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/98xxx/CVE-2026-98130.json">CVE-2026-98130</a> Added Reference https://git.kernel.org/stable/c/09e7f9290d63178f56095d5c18fb9f9470153db5 Added Reference https://git.kernel.org/stable/c/3205a20f837f5b1f009427ac3d9f706bf8a6fbec Added Reference https://git.kernel.org/stable/c/755d70ca845fd9b87c7b338ae6ae832b08cd0005 Added Reference https://git.kernel.org/stable/c/cbf2df9aac4202f9fb0b361a7fe8c79b29fad92c -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Sep. 25, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Sep. 25, 2026
Action Type Old Value New Value Added 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. Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/98xxx/CVE-2026-98130.json">CVE-2026-98130</a> Added Reference https://git.kernel.org/stable/c/00b841bac10230c557be6b38efc48508198fe23e Added Reference https://git.kernel.org/stable/c/2188569e7e1b0bc3f3b557dc97ab7a02befc11c8 Added Reference https://git.kernel.org/stable/c/3d698d1e6c8bc41e3e1707777a016f1bdd07842d Added Reference https://git.kernel.org/stable/c/e42ba56281ca3ae2dcb3558bebee9a1c9a4831d9