CVE-2026-74287
Linux kernel vulnerability
- Published15 Aug 2026
Description
In the Linux kernel, the following vulnerability has been resolved: sctp: validate embedded address parameter length sctp_verify_asconf() and sctp_verify_param() only validate ADD_IP, DEL_IP, and SET_PRIMARY parameters against a fixed minimum size of sizeof(struct sctp_addip_param) + sizeof(struct sctp_paramhdr). This ensures the outer parameter is large enough to contain an embedded address parameter header, but does not verify that the embedded address parameter's declared length fits within the bounds of the outer parameter. Later, sctp_process_param() and sctp_process_asconf_param() extract the embedded address parameter and pass it to af->from_addr_param(), which uses the address parameter length to parse the variable-length address payload. A malformed peer can therefore advertise an embedded address parameter length that exceeds the remaining bytes in the enclosing parameter. Validate that addr_param->p.length does not exceed the space available after the sctp_addip_param header before processing the embedded address parameter. Reject malformed parameters when the embedded address length extends beyond the enclosing parameter bounds. This prevents out-of-bounds reads when parsing malformed parameters carried in INIT or ASCONF processing paths.
CVSS 3.1 breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:HRemediation
No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.
References
- https://git.kernel.org/stable/c/06c8bf48505f2fef265931db82d5003d302a347b
- https://git.kernel.org/stable/c/0c674b20c9cdb54f8a46c88b4d00cadf82b8f0c0
- https://git.kernel.org/stable/c/28ba1d3c956604a89168adfb4c97cfc6c509bba5
- https://git.kernel.org/stable/c/3a44b2602d57e11e2eb85958d4cd500d14a27d9e
- https://git.kernel.org/stable/c/85f54cf589163a75fa06e37d8c2a4a72824c6dd1
- https://git.kernel.org/stable/c/92e4adfee56f32a963ebb105c6cd9a1ed707262a
- https://git.kernel.org/stable/c/e9361d0ca55c4af12aac09e2572852fa91046229
- https://git.kernel.org/stable/c/ed8605c6f39b9b84f9a4631db6deb25e7f1e973c
Frequently asked
Is CVE-2026-74287 being actively exploited?
CVE-2026-74287 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.73%.
How severe is CVE-2026-74287?
CVE-2026-74287 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.73% probability of exploitation.
How do I fix CVE-2026-74287?
Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.
How Secuno handles this
Secuno correlates vulnerabilities like CVE-2026-74287 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.
Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.