CVE-2026-15422: SCTP needs to better-check INIT ACK chunk parameters
Noroxi assessment
Priority: Monitor (action score 36/100)
- 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: 0.88% (FIRST EPSS); higher than 58.9% of all records.
- Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
- According to CISA the attack is automatable: targets can be found by mass scanning.
- Fixed version: illumos illumos-gate 53a3efdeff8e6745bbfb69c5360f94962fb79e75; OmniOS OmniOS r151054bj, r151056aj, r151058j; Triton Data Center SmartOS 20260709.
Low priority for now. Upgrade to illumos illumos-gate 53a3efdeff8e6745bbfb69c5360f94962fb79e75; OmniOS OmniOS r151054bj, r151056aj, r151058j; Triton Data Center SmartOS 20260709 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
The illumos SCTP inbound path performs association lookup for INIT ACK chunks without adequately validating the address parameters carried in the chunk. Since this lookup runs during packet classification (i.e. before SCTP integrity checks or IPsec policy are applied) a remote, unauthenticated attacker can send a crafted SCTP INIT ACK packet with malformed address parameters to cause an out-of-bounds access and kernel heap corruption, which may lead to remote code execution. The flaw has existed since 2010 (illumos-gate commit a5407c02), and affects any illumos distribution prior to illumos-gate commit 53a3efde.
- Published
- Jul 16, 2026
- Updated
- Jul 17, 2026
- EPSS
- 0.8% · 58th percentile
- CWE
- CWE-122
Report tools
Action score
36
Monitor
Low priority for now.
- CVSS
- 36 / 40 · 9.1 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.8%
CISA SSVC decision
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · illumos
- 9.1
- NVD has not scored this yet; the score shown is the CNA’s.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/S:P/AU:Y/R:U/V:C/RE:H/U:Red
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.
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Versions reported by the vendor
Affected version ranges reported by the assigning authority (illumos). Independent of NVD's CPE analysis and usually ahead of it.
illumos illumos-gate
- a5407c02d5ed61b29481b9b71f1307d7ebec9e5c and later · before 53a3efdeff8e6745bbfb69c5360f94962fb79e75affected · gitfixed in 53a3efdeff8e6745bbfb69c5360f94962fb79e75
OmniOS OmniOS
- r151058 and later · before r151058jaffectedfixed in r151058j
- r151056 and later · before r151056ajaffectedfixed in r151056aj
- r151054 and later · before r151054bjaffectedfixed in r151054bj
- any and later · before r151054affected
Triton Data Center SmartOS
- any and later · before 202060709affectedfixed in 20260709
Same product
illumos: all recordsOther highest-scoring records for the same primary product.
- CVE-2023-31284illumos illumos-gate before 676abcb has a stack buffer overflow in /dev/net, leading to privilege escalation via a stat on a long file name 31Monitor
- CVE-2026-104112Missing release of passed file descriptors in illumos nscd allows local users to exhaust kernel memory27Monitor
- CVE-2026-102916Reachable assertion in illumos bhyve REP string instruction emulation allows guest to panic host27Monitor
Published before and after this one in the same product
- Later →CVE-2026-15449Jul 16, 2026 · TOCTOU double copyin in illumos dld ioctl handling causes kernel heap corruption23Monitor
- Later →CVE-2026-104114Oct 9, 2026 · NULL pointer dereference in illumos nwamd door handler allows local users to crash the daemon21Monitor
- Later →CVE-2026-104115Oct 9, 2026 · Stack buffer overflow in illumos reparsed nfs-basic plugin allows local users to crash the daemon21Monitor
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 |
|---|---|---|
| illumos illumos-gate | 53a3efdeff8e6745bbfb69c5360f94962fb79e75 | Vendor (CNA) |
| OmniOS OmniOS | r151054bj | Vendor (CNA) |
| OmniOS OmniOS | r151056aj | Vendor (CNA) |
| OmniOS OmniOS | r151058j | Vendor (CNA) |
| Triton Data Center SmartOS | 20260709 | Vendor (CNA) |
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.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
- Sourquefinder
- Dan McDonaldremediation developer
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
- CVE-2026-154490 days apartTOCTOU double copyin in illumos dld ioctl handling causes kernel heap corruption23Monitor
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
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Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
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.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- Integrity
- Availability
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- P
Weakness class (CWE)
CWE-122 · Heap-based Buffer OverflowCVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:Y/R:U/V:C/RE:H/U:Red
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
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Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (2 more)Show less
Vendor advisories and official records. Exploit/PoC links are deliberately left out.