Oracle Solaris End of Life: Sun Died in 2010, the Dates Run to 2037 — and the Real Deadline Is January 1, 2027

By Scott Bissett  ·  Published: August 12, 2026  ·  EOL Watch — deadline coverage  ·  Dates verified against Oracle's Lifetime Support Policy brochure for Oracle and Sun system software (effective July 11, 2025), Oracle's Solaris 11.4 release notes, the live CISA KEV catalog, and our tracked lifecycle data — methodology

People still search for "Sun EOL," and the question deserves a straight answer. Sun Microsystems ceased to exist in January 2010, when Oracle completed the acquisition. Its operating system did not. Oracle Solaris 11.4 carries Premier Support to November 2031 and Extended Support to November 2037 — dates published in Oracle's own Lifetime Support Policy brochure. If those dates hold (and Oracle's policy says they are floors, re-evaluated annually as "at least" commitments), Solaris will have outlived the company that built it by more than a quarter century. Among the operating systems we track, only RHEL 10's paid Extended Life Cycle Support, reaching May 2039, extends further into the future.

That is the headline. Here is the trap underneath it: almost nobody running "supported Solaris" is on 11.4's runway. The estates this article is written for — the SPARC boxes running billing, telecom switching, manufacturing control, the systems whose justification is "it still runs" — are disproportionately on Solaris 10 and 11.3. Both of those releases share one date: Extended Support ends January 1, 2027. That is 142 days from publication. After that day, both drop into Oracle's Sustaining Support — a phase that answers the phone forever and ships new security fixes never.

How Oracle's Solaris support ladder actually works

Oracle's model for operating systems has three phases, and the definitions matter more here than for almost any other product we cover, because Solaris estates routinely live in the third one for a decade without noticing what it excludes. From Oracle's Lifetime Support Policy brochure for Oracle and Sun system software:

Premier Support is the full-service phase — Oracle commits to "a minimum ten-year support period" for the operating system. It includes program updates, patches, fixes, security patches, security alerts, and "Critical Patch Updates for Oracle Solaris operating system software." For Solaris 11, delivery is through Support Repository Updates (SRUs) — the brochure's own footnote spells out that "Solaris 11 updates are provided through Support Repository Updates (SRU)," with Interim Diagnostic or Relief (IDR) updates for issues that cannot wait for the next SRU.

Extended Support is the paid overtime phase — "for selected Oracle Linux and Oracle Solaris operating system software releases, Oracle may extend the technical support period by offering Extended Support for a three-year period." Crucially, for Solaris it still includes "fixes, security patches, security alerts, and critical patch updates." A Solaris 10 or 11.3 estate under Extended Support today is genuinely patched — that is what makes January 1, 2027 a real cliff rather than a formality. For 11.3 specifically, Oracle's footnote notes that post-2018 fixes arrive as Limited Support Updates (LSUs) and IDRs rather than the 11.4 SRU stream.

Sustaining Support is the phase Oracle offers "for an indefinite period" — and the reason a Solaris estate can feel supported forever. It includes access to technical experts, My Oracle Support, and assistance with service requests 24x7. But Oracle's own exclusion list is explicit. Sustaining Support does not include: "new program updates, patches, fixes, security patches, security alerts, critical patch updates" and specifically "new critical patch updates for Oracle Solaris operating system software." Everything you receive on Sustaining Support was "created during the Oracle Premier Support period." The phone still answers. The diagnosis still happens. The fix never comes.

That last phase is the Solaris trap in one sentence: Sustaining Support is indefinite support for the software as it existed on the day its patch window closed. Solaris 9 has been there since 2014, Solaris 8 since 2012 — and on January 1, 2027, Solaris 10 and 11.3 join them, permanently.

Every Solaris version's dates

Every release we track, newest first, with live status. Dates are from our tracked lifecycle data (verification pass 2026-08-12), cross-checked against Oracle's Lifetime Support Policy brochure (effective July 11, 2025). Each version links to its lifecycle page with live status and risk score.

Dates from our tracked dataset (verification pass 2026-08-12), cross-checked against Oracle's Lifetime Support Policy: Oracle and Sun System Software and Operating Systems (effective July 11, 2025). Oracle publishes these dates to month precision; our tracked data carries them as first-of-month dates, and release dates to day precision. "Ended" reflects releases whose fixes Oracle delivers only via newer Solaris 11 updates; "Not offered" reflects Oracle's "Not Available" for Extended Support. Sustaining Support is listed as "Indefinite" for every release above.

Solaris 11.4: the terminal release — and what "no Solaris 12" actually means

There is no Solaris 12, and Oracle's published documents explain the model without requiring anyone to speculate. The Lifetime Support Policy's footnote on 11.4 reads: "Solaris 11.4 follows a Continuous Delivery model, where new functionality is delivered as updates to the existing release; upgrades are not required to gain access to new features and capabilities. As a result, Support dates are evaluated for update annually, and will be provided through at least the dates above."

Unpacked, that is three commitments. First, 11.4 is the release — new features arrive as SRUs to 11.4, not as a version 12 you migrate to. Second, the November 2031 and November 2037 dates are floors: Oracle reviews them every year and the published numbers are "at least" figures. Third — and this is the part that matters for planning — there is no published anything beyond those dates. We track what vendors publish, and what Oracle publishes is: continuous delivery on 11.4, Premier to at least November 2031, Extended to at least November 2037, Sustaining indefinitely after. A nineteen-year runway from GA is the longest single-release commitment of any operating system in our data except the one Solaris 10 already completed.

For a platform whose parent company died in 2010, that is a remarkable position — the support ladder runs longer than most of the software written on top of it. It is also a genuinely unusual one: most vendors we cover ship successors and expire predecessors. Oracle's Solaris model instead concentrates the entire future of the platform on one release. Which makes the operational question binary: you are on 11.4, or you are on borrowed time.

The Sustaining trap: exploited in the wild, unpatched by design

The comfortable story a Sustaining-Support estate tells itself is that Solaris is obscure enough not to be a target. The live CISA Known Exploited Vulnerabilities catalog says otherwise — as of the August 10, 2026 catalog release, it contains two Oracle Solaris entries, both confirmed exploited in the wild:

CVE-2020-14871 — listed as "Oracle Solaris and Zettabyte File System (ZFS) Unspecified Vulnerability," added to the KEV catalog on November 3, 2021: per CISA, Oracle Solaris and the Oracle ZFS Storage Appliance Kit "contain an unspecified vulnerability causing high impacts to confidentiality, integrity, and availability of affected systems." And CVE-2019-3010 — "Oracle Solaris Privilege Escalation Vulnerability" in the XScreenSaver component, added May 25, 2022. CISA's required action for both is the same eight words: "Apply updates per vendor instructions."

Read that required action against Oracle's Sustaining Support exclusion list and the trap closes. Both of those CVEs were fixed during their releases' patch windows — a machine current on SRUs never had a long exposure. But "apply updates per vendor instructions" only works while the vendor still creates updates for your release. On January 1, 2027, Solaris 11.3 and Solaris 10 cross into the phase where — per Oracle's own policy — no new security patches and no new Critical Patch Updates are created, at any price. The next CVE-2020-14871 that lands on those releases is not a patching backlog. It is permanent, and it arrives on systems that still feel supported because My Oracle Support still answers. That combination — proven in-the-wild exploitation history, indefinite phone support, zero future fixes — is the specific failure mode this site exists to name.

The migration reality: one cheap move, one hard question

The cheap move is 11.3 to 11.4, and it is genuinely cheap. This is not a rebuild — it is an in-place pkg update within Solaris 11, and Oracle's 11.4 release notes document the path: run Oracle's pre-update checker, clear the handful of known considerations (Java 8 mediation, /var/tmp hygiene, MySQL 5.1, OpenLDAP export), update, and boot into a new boot environment — with the old one intact to fall back to. For an OS transition, that is about as low-risk as the industry gets.

The constraint is hardware, and Oracle is precise about it: "Oracle Solaris 11.4 supports systems based on the Oracle SPARC T4 or later processors; the Fujitsu SPARC64 X, X+, or XII processors; or x64 CPUs supporting either the Intel EM64T or AMD AMD64 instruction sets." The release notes then list what cannot make the jump: SPARC Enterprise M3000 through M9000 systems on SPARC64 VI/VII/VII+, and every platform built on UltraSPARC T1, T2, T2+, and T3. If your estate is on that list, "update to 11.4" is a hardware refresh wearing a software costume — Oracle's own guidance points those systems at a My Oracle Support document about keeping 11.3 on critical fixes "until you can upgrade the hardware," and that grace runs out with 11.3's Extended Support.

Solaris 10 estates face the harder question. There is no in-place update from Solaris 10 to 11 — the documented intermediate step, Solaris 10 Containers (running the old environment inside a zone on newer Solaris), reaches the end of its own Premier Support in January 2027 per the same Oracle brochure. That leaves the honest fork every "it still runs" estate eventually faces: re-platform the application onto supported Solaris 11.4 on current SPARC hardware, or leave Solaris entirely — which means leaving SPARC, which means the application-porting, endianness, and ISV-support questions that kept these systems frozen in the first place. Neither path fits in 142 days from a standing start; what fits in 142 days is deciding which path you are on before the patches stop, rather than after.

The three-step check, today: inventory every Solaris instance and zone — uname -rv tells you the release, pkg info entire (on 11.x) tells you how current you are. Map each against the table above. Anything on 11.4 gets its SRU currency checked; anything on 11.3 with T4-or-later hardware gets a pkg update scheduled before January 1; anything on Solaris 10, pre-T4 SPARC, or older gets the harder conversation — Extended Support has under five months left, and Sustaining Support is not a security posture.

We track Oracle Solaris and 480+ other products against vendor-verified dates — every Solaris version with live status, check any version in seconds, or see what else hits end of life this quarter.

Frequently Asked Questions

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• All Oracle Solaris versions with live status · Solaris 11.3 — dates and risk score · Solaris 10 — dates and risk score
• IBM AIX End of Life: the Technology Level Clock — the other big-iron Unix, where support expires per TL, not per release
• IBM i (AS/400, iSeries) End of Life · IBM MQ End of Support — the rest of our big-iron series: the platforms that outlive their names
• Oracle 19c End of Support — the same Premier/Extended/Sustaining ladder applied to the database likely running on these same Solaris boxes
• What Extended Support Actually Costs — where Oracle's percentage-uplift model fits in the cross-vendor pricing landscape
• IBM End-of-Life Dates: The Complete Enterprise Matrix · The 2026 EOL Calendar