CVE-2026-98130: sctp: fix a TOCTOU race in SCTP_CMD_TIMER_START
Noroxi assessment
Priority: Monitor (action score 32/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 0.45% (FIRST EPSS).
- Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
- Fixed version: Linux Linux 00b841bac10230c557be6b38efc48508198fe23e, 09e7f9290d63178f56095d5c18fb9f9470153db5, 2188569e7e1b0bc3f3b557dc97ab7a02befc11c8; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.158.1-1.
- Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).
Low priority for now. Upgrade to Linux Linux 00b841bac10230c557be6b38efc48508198fe23e, 09e7f9290d63178f56095d5c18fb9f9470153db5, 2188569e7e1b0bc3f3b557dc97ab7a02befc11c8; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.158.1-1 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
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.
- Published
- Sep 25, 2026
- Updated
- Oct 22, 2026
- EPSS
- 0.4% · 39th percentile
- CWE
- CWE-362
Report tools
Action score
32
Monitor
Low priority for now.
- CVSS
- 32 / 40 · 8.1 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.4%
CNA vs NVD score
- NVD
- —
- CNA · Linux
- 8.1
- NVD has not scored this yet; the score shown is the CNA’s.
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| linux | linux kernel | cpe:2.3:o:linux:linux_kernel |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- linux linux kernel4.19.126 and later · before 4.20
- linux linux kernel5.4.44 and later · before 5.5
- linux linux kernel5.6.16 and later · before 5.7
- linux linux kernel5.7.1 and later · before 5.10.271
- linux linux kernel5.11 and later · before 5.15.222
- linux linux kernel5.16 and later · before 6.1.189
- linux linux kernel6.2 and later · before 6.6.158
- linux linux kernel6.7 and later · before 6.12.111
- linux linux kernel6.13 and later · before 6.18.53
- linux linux kernel6.19 and later · before 7.2.7
- linux linux kernel5.7
- linux linux kernel7.3
Versions reported by the vendor
Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.
Linux Linux
- 9c0a4652f750afe3b4468cbcd9335b244ce2facd, 70989e501fbce502198d82da88358ce453575a05, 085bb270b4b1168c93afb37bbafc881207d15443, 5.7affected
- 20a785aa52c82246055a089e55df9dac47d67da1 and later · before cbf2df9aac4202f9fb0b361a7fe8c79b29fad92caffected · git
- 20a785aa52c82246055a089e55df9dac47d67da1 and later · before 3205a20f837f5b1f009427ac3d9f706bf8a6fbecaffected · git
- 20a785aa52c82246055a089e55df9dac47d67da1 and later · before 755d70ca845fd9b87c7b338ae6ae832b08cd0005affected · git
- 20a785aa52c82246055a089e55df9dac47d67da1 and later · before 09e7f9290d63178f56095d5c18fb9f9470153db5affected · git
- 20a785aa52c82246055a089e55df9dac47d67da1 and later · before e42ba56281ca3ae2dcb3558bebee9a1c9a4831d9affected · git
- 20a785aa52c82246055a089e55df9dac47d67da1 and later · before 00b841bac10230c557be6b38efc48508198fe23eaffected · git
- 20a785aa52c82246055a089e55df9dac47d67da1 and later · before 3d698d1e6c8bc41e3e1707777a016f1bdd07842daffected · git
- 20a785aa52c82246055a089e55df9dac47d67da1 and later · before 2188569e7e1b0bc3f3b557dc97ab7a02befc11c8affected · git
- 4.19.126 and later · before 4.20affected · semver
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | linux | before 6.1.190-1 | 6.1.190-1 |
| Debian:12 | linux-6.12 | before 6.12.111-1~deb12u1 | 6.12.111-1~deb12u1 |
| Debian:13 | linux | before 6.12.111-1 | 6.12.111-1 |
| Debian:14 | linux | before 7.2.7-1 | 7.2.7-1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-64kb | before 5.14.21-150400.24.246.1 | 5.14.21-150400.24.246.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-docs | before 5.14.21-150400.24.246.1 | 5.14.21-150400.24.246.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-obs-build | before 5.14.21-150400.24.246.1 | 5.14.21-150400.24.246.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-syms | before 5.14.21-150400.24.246.1 | 5.14.21-150400.24.246.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS | kernel-64kb | before 5.14.21-150500.55.195.1 | 5.14.21-150500.55.195.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS | kernel-docs | before 5.14.21-150500.55.195.1 | 5.14.21-150500.55.195.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS | kernel-obs-build | before 5.14.21-150500.55.195.1 | 5.14.21-150500.55.195.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS | kernel-syms | before 5.14.21-150500.55.195.1 | 5.14.21-150500.55.195.1 |
| SUSE:Linux Enterprise Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4_Update_61 | before 1-150400.9.3.1 | 1-150400.9.3.1 |
| SUSE:Linux Enterprise Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5_Update_47 | before 1-150500.11.3.1 | 1-150500.11.3.1 |
| SUSE:Linux Enterprise Live Patching 15 SP6 | kernel-default | before 6.4.0-150600.23.143.1 | 6.4.0-150600.23.143.1 |
| SUSE:Linux Enterprise Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6_Update_33 | before 1-150600.13.5.1 | 1-150600.13.5.1 |
| SUSE:Linux Enterprise Micro 5.3 | kernel-default | before 5.14.21-150400.24.246.1 | 5.14.21-150400.24.246.1 |
| SUSE:Linux Enterprise Micro 5.3 | kernel-default-base | before 5.14.21-150400.24.246.1.150400.24.124.1 | 5.14.21-150400.24.246.1.150400.24.124.1 |
| SUSE:Linux Enterprise Micro 5.3 | kernel-source | before 5.14.21-150400.24.246.1 | 5.14.21-150400.24.246.1 |
| SUSE:Linux Enterprise Micro 5.4 | kernel-rt | before 5.14.21-150400.15.192.2 | 5.14.21-150400.15.192.2 |
| SUSE:Linux Enterprise Micro 5.4 | kernel-source-rt | before 5.14.21-150400.15.192.2 | 5.14.21-150400.15.192.2 |
| SUSE:Linux Enterprise Micro 5.5 | kernel-default | before 5.14.21-150500.55.195.1 | 5.14.21-150500.55.195.1 |
| SUSE:Linux Enterprise Micro 5.5 | kernel-default-base | before 5.14.21-150500.55.195.1.150500.6.91.1 | 5.14.21-150500.55.195.1.150500.6.91.1 |
| SUSE:Linux Enterprise Micro 5.5 | kernel-rt | before 5.14.21-150500.13.167.2 | 5.14.21-150500.13.167.2 |
+11
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV90Now
- CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV89Now
- CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV85Now
Published before and after this one in the same product
- ← EarlierCVE-2026-98128Sep 25, 2026 · scsi: mpi3mr: Fix target device refcount leak in mpi3mr_sas_port_add()22Monitor
- ← EarlierCVE-2026-98129Sep 25, 2026 · scsi: mpi3mr: Fix NULL pointer dereference in mpi3mr_sas_port_add()22Monitor
- Later →CVE-2026-98131Sep 25, 2026 · net: stmmac: fix dma mapping leak in stmmac_tso_xmit()22Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Linux Linux | 00b841bac10230c557be6b38efc48508198fe23e | Vendor (CNA) |
| Linux Linux | 09e7f9290d63178f56095d5c18fb9f9470153db5 | Vendor (CNA) |
| Linux Linux | 2188569e7e1b0bc3f3b557dc97ab7a02befc11c8 | Vendor (CNA) |
| Linux Linux | 3205a20f837f5b1f009427ac3d9f706bf8a6fbec | Vendor (CNA) |
| Linux Linux | 3d698d1e6c8bc41e3e1707777a016f1bdd07842d | Vendor (CNA) |
| Linux Linux | 4.20 | Vendor (CNA) |
| Linux Linux | 5.5 | Vendor (CNA) |
| Linux Linux | 5.7 | Vendor (CNA) |
| Linux Linux | 755d70ca845fd9b87c7b338ae6ae832b08cd0005 | Vendor (CNA) |
| Linux Linux | cbf2df9aac4202f9fb0b361a7fe8c79b29fad92c | Vendor (CNA) |
| Linux Linux | e42ba56281ca3ae2dcb3558bebee9a1c9a4831d9 | Vendor (CNA) |
| azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 | 6.6.158.1-1 · Release Notes | Microsoft (MSRC) |
| debian:linux | 6.1.190-1 · Debian:12 | Package registry (OSV) |
| debian:linux | 6.12.111-1 · Debian:13 | Package registry (OSV) |
| debian:linux-6.12 | 6.12.111-1~deb12u1 · Debian:12 | Package registry (OSV) |
| suse:kernel-64kb | 6.4.0-150600.23.143.1 · SUSE:Linux Enterprise Server 15 SP6-LTSS | Package registry (OSV) |
| suse:kernel-default | 6.4.0-150600.23.143.1 · SUSE:Linux Enterprise Live Patching 15 SP6 | Package registry (OSV) |
| suse:kernel-default-base | 6.4.0-150600.23.143.1.150600.12.66.3 · SUSE:Linux Enterprise Server 15 SP6-LTSS | Package registry (OSV) |
| suse:kernel-docs | 6.4.0-150600.23.143.1 · SUSE:Linux Enterprise Server 15 SP6-LTSS | Package registry (OSV) |
| suse:kernel-livepatch-SLE15-SP4_Update_61 | 1-150400.9.3.1 · SUSE:Linux Enterprise Live Patching 15 SP4 | Package registry (OSV) |
| suse:kernel-livepatch-SLE15-SP5_Update_47 | 1-150500.11.3.1 · SUSE:Linux Enterprise Live Patching 15 SP5 | Package registry (OSV) |
| suse:kernel-livepatch-SLE15-SP6_Update_33 | 1-150600.13.5.1 · SUSE:Linux Enterprise Live Patching 15 SP6 | Package registry (OSV) |
| suse:kernel-obs-build | 6.4.0-150600.23.143.1 · SUSE:Linux Enterprise Server 15 SP6-LTSS | Package registry (OSV) |
| suse:kernel-rt | 5.14.21-150500.13.167.2 · SUSE:Linux Enterprise Micro 5.5 | Package registry (OSV) |
| suse:kernel-source | 6.4.0-150600.23.143.1 · SUSE:Linux Enterprise Server 15 SP6-LTSS | Package registry (OSV) |
| suse:kernel-syms | 6.4.0-150600.23.143.1 · SUSE:Linux Enterprise Server 15 SP6-LTSS | Package registry (OSV) |
| suse:kernel-zfcpdump | 6.4.0-150600.23.143.1 · SUSE:Linux Enterprise Server 15 SP6-LTSS | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-26-1184 · Sep 28, 2026(Linux Kernel Güvenlik Bildirimi)
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- Special conditions such as timing or configuration are required.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- High
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
nvd-secondary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
—
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (7 more)Show less
- git.kernel.org/stable/c/09e7f9290d63178f56095d5c18fb9f9470153db5
- git.kernel.org/stable/c/2188569e7e1b0bc3f3b557dc97ab7a02befc11c8
- git.kernel.org/stable/c/3205a20f837f5b1f009427ac3d9f706bf8a6fbec
- git.kernel.org/stable/c/3d698d1e6c8bc41e3e1707777a016f1bdd07842d
- git.kernel.org/stable/c/755d70ca845fd9b87c7b338ae6ae832b08cd0005
- git.kernel.org/stable/c/cbf2df9aac4202f9fb0b361a7fe8c79b29fad92c
- git.kernel.org/stable/c/e42ba56281ca3ae2dcb3558bebee9a1c9a4831d9
Vendor advisories and official records. Exploit/PoC links are deliberately left out.