CVE-2011-1573

MEDIUMNVD 5.95.9—
EchelonGraph scoreMEDIUM confidence

Score 5.9 from GitHub Security Advisory published 2022-05-13. NVD baseline CVSS 5.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.9
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 3%CVSS: 5.9Exploit: NoneExposed: 0

A fix is available — apply it.

net/sctp/sm_make_chunk.c in the Linux kernel before 2.6.34, when addip_enable and auth_enable are used, does not consider the amount of zero padding during calculation of chunk lengths for (1) INIT and (2) INIT ACK chunks, which allows remote attackers to cause a denial of service (OOPS) via crafted packet data.

CVSS v3
5.9
EG Score
5.9(medium)
EPSS
84.9%
KEV
Not listed

Published

February 2, 2012

Last Modified

April 29, 2026

Advisory Details (4)

Auto-updated May 29, 2026
Patch available. Sources: redhat.
generic

oss-security - CVE request - kernel: sctp: fix to calc the INIT/INIT-ACK chunk length correctly to set

http://openwall.com/lists/oss-security/2011/04/11/4
generic

oss-security - Re: CVE request - kernel: sctp: fix to calc the INIT/INIT-ACK chunk length correctly to set

http://openwall.com/lists/oss-security/2011/04/11/12
redhat Patch Available

695383 – (CVE-2011-1573) CVE-2011-1573 kernel: sctp: fix to calc the INIT/INIT-ACK chunk length correctly to set

Affected: Red Hat Enterprise Linux 4 as it did not support SCTP authentication and extended parameters. It did not affect the version of

https://bugzilla.redhat.com/show_bug.cgi?id=695383
generic
http://rhn.redhat.com/errata/RHSA-2011-0927.html

Vendor Advisories for CVE-2011-1573(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(8)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-image-2.6.32-32-sparc64 (2.6.32-32.62) @ lucid2026-05-29ubuntu
ubuntulinux-image-2.6.24-29-lpiacompat (2.6.24-29.95) @ hardy2026-05-29ubuntu
ubuntulinux-image-2.6.38-12-generic (2.6.38-12.51~lucid1) @ lucid2026-05-29ubuntu
ubuntulinux-image-2.6.32-217-dove (2.6.32-217.34) @ lucid2026-05-29ubuntu
ubuntulinux-image-2.6.32-417-dove (2.6.32-417.34) @ maverick2026-05-29ubuntu
ubuntulinux-image-2.6.31-611-imx51 (2.6.31-611.29) @ lucid2026-05-29ubuntu
redhatkernel-0:2.6.18-238.19.1.el52011-07-15redhat
redhatkernel-0:2.6.32-71.29.1.el62011-05-10redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(7)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 8× in last 7d / 38× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 104 total refreshes for this CVE.

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Frequently asked(5)

What is CVE-2011-1573?
CVE-2011-1573 is a medium vulnerability published on February 2, 2012. net/sctp/smmakechunk.c in the Linux kernel before 2.6.34, when addipenable and authenable are used, does not consider the amount of zero padding during calculation of chunk lengths for (1) INIT and (2) INIT ACK chunks, which allows remote attackers to cause a denial of service (OOPS) via crafted…
When was CVE-2011-1573 disclosed?
CVE-2011-1573 was first published in the National Vulnerability Database on February 2, 2012, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2011-1573 actively exploited?
CVE-2011-1573 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 84.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2011-1573?
CVE-2011-1573 has a CVSS v3 base score of 5.9 (NVD).
How do I remediate CVE-2011-1573?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2011-1573, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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