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CVE

CVE-2026-15422

SCTP needs to better-check INIT ACK chunk parameters
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CVE

CVE-2026-15422

SCTP needs to better-check INIT ACK chunk parameters

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.1
-
4.0
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
C
H
U
0
-
C
H
U
-

Related Resources

No items found.

References

https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/15xxx/CVE-2026-15422.json, https://nvd.nist.gov/vuln/detail/CVE-2026-15422, https://illumos.org/issues/18117, https://github.com/illumos/illumos-gate/commit/53a3efdeff8e6745bbfb69c5360f94962fb79e75, https://github.com/illumos/illumos-gate, https://illumos.topicbox.com/groups/developer/Ta1a8e2e1f7f928df/18117-sctp-needs-to-better-check-init-ack-chunk-parameters

Severity

0

CVSS Score
0
10

Basic Information

Base CVSS
0
EPSS Probability
0.00882%
EPSS Percentile
0.56821%
Introduced Version
0
Fix Available
53a3efdeff8e6745bbfb69c5360f94962fb79e75

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