Today is the 16th anniversary of the completion of se4’s proof of implementation correctness, and the 11th anniversary of seL4 being open-sourced.
Happy #seL4 Day from all at Trustworthy Systems!
Happy #seL4 Day from all at Trustworthy Systems!
July 29, 2025 at 2:26 AM
Today is the 16th anniversary of the completion of se4’s proof of implementation correctness, and the 11th anniversary of seL4 being open-sourced.
Happy #seL4 Day from all at Trustworthy Systems!
Happy #seL4 Day from all at Trustworthy Systems!
apparently the TCP/IP stack that i designed is used in seL4! in the microkit library, specifically (sel4-async-network)
October 7, 2025 at 8:31 AM
apparently the TCP/IP stack that i designed is used in seL4! in the microkit library, specifically (sel4-async-network)
It finally happened – the MCS variant of #seL4 is verified (on RISC-V)!
Proofcraft has just finished the functional correctness proof of this most powerful version of the kernel, specifically aimed at supporting mixed-criticality real-time systems.
sel4.systems/news/#mcs26
Proofcraft has just finished the functional correctness proof of this most powerful version of the kernel, specifically aimed at supporting mixed-criticality real-time systems.
sel4.systems/news/#mcs26
seL4 News | seL4
sel4.systems
June 29, 2026 at 8:24 AM
It finally happened – the MCS variant of #seL4 is verified (on RISC-V)!
Proofcraft has just finished the functional correctness proof of this most powerful version of the kernel, specifically aimed at supporting mixed-criticality real-time systems.
sel4.systems/news/#mcs26
Proofcraft has just finished the functional correctness proof of this most powerful version of the kernel, specifically aimed at supporting mixed-criticality real-time systems.
sel4.systems/news/#mcs26
Genode Sculpt OS runs on #seL4: sel4.systems/news/#sculpt
seL4 News | seL4
sel4.systems
November 12, 2025 at 10:31 AM
Genode Sculpt OS runs on #seL4: sel4.systems/news/#sculpt
The seL4 whitepaper is trending on HN: news.ycombinator.com/item?id=4345...
The SeL4 Microkernel: An Introduction [pdf] | Hacker News
news.ycombinator.com
March 24, 2025 at 8:48 AM
The seL4 whitepaper is trending on HN: news.ycombinator.com/item?id=4345...
Very pleased that UNSW is sponsoring this year’s #seL4 Summit again: sel4.systems/news/#sponso...
seL4 News | seL4
sel4.systems
May 21, 2025 at 12:29 AM
Very pleased that UNSW is sponsoring this year’s #seL4 Summit again: sel4.systems/news/#sponso...
Great to see ANU joining the #seL4 Foundation, in line with the collaboration between Trustworthy Systems and the FM/PL folks at ANU, all around #seL4 and #LionsOS
sel4.systems/news/#09-18
sel4.systems/news/#09-18
seL4 News | seL4
sel4.systems
September 18, 2026 at 5:06 AM
Great to see ANU joining the #seL4 Foundation, in line with the collaboration between Trustworthy Systems and the FM/PL folks at ANU, all around #seL4 and #LionsOS
sel4.systems/news/#09-18
sel4.systems/news/#09-18
The recordings of all presentations from this month's #seL4 Summit are up: sel4.systems/news/2025.ht...
seL4 News | seL4
sel4.systems
September 23, 2025 at 1:32 AM
The recordings of all presentations from this month's #seL4 Summit are up: sel4.systems/news/2025.ht...
basically all software becomes seL4-tier security postured, because we now have the cognitive resources to do that. but for small, poorly resourced projects this dynamic seems attacker favored for a while just because of the sheer speed
April 7, 2026 at 9:41 PM
basically all software becomes seL4-tier security postured, because we now have the cognitive resources to do that. but for small, poorly resourced projects this dynamic seems attacker favored for a while just because of the sheer speed
There is a whole branch of formal methods that consists not of TLA+ style modeling, but checking assertions about the code directly, sometimes (as in the case of this widely used OS microkernel) down to the level of machine instructions. sel4.systems/Verification...
seL4 Proofs | seL4
sel4.systems
July 26, 2026 at 2:51 PM
There is a whole branch of formal methods that consists not of TLA+ style modeling, but checking assertions about the code directly, sometimes (as in the case of this widely used OS microkernel) down to the level of machine instructions. sel4.systems/Verification...
The slides and videos from the #seL4 Summit are now available from the program page: sel4.systems/Summit/2026/...
September 16, 2026 at 8:08 AM
The slides and videos from the #seL4 Summit are now available from the program page: sel4.systems/Summit/2026/...
After thinking about the best 64-bit microkernel OS skeleton that I could port RISC OS to run on top of, so that it would be both better and easier to get bootstrapped than trying to run on the raw hardware like it currently does, I think seL4 is the only logical choice. github.com/seL4/seL4
October 15, 2025 at 3:53 AM
After thinking about the best 64-bit microkernel OS skeleton that I could port RISC OS to run on top of, so that it would be both better and easier to get bootstrapped than trying to run on the raw hardware like it currently does, I think seL4 is the only logical choice. github.com/seL4/seL4
SeL4 on AArch64 gets confidentiality proof 🔒
Proofcraft has completed the formal mathematical proof for SeL4's confidentiality on AArch64, ensuring the kernel prevents unauthorized information access.
Proofcraft has completed the formal mathematical proof for SeL4's confidentiality on AArch64, ensuring the kernel prevents unauthorized information access.
August 24, 2026 at 8:00 PM
SeL4 on AArch64 gets confidentiality proof 🔒
Proofcraft has completed the formal mathematical proof for SeL4's confidentiality on AArch64, ensuring the kernel prevents unauthorized information access.
Proofcraft has completed the formal mathematical proof for SeL4's confidentiality on AArch64, ensuring the kernel prevents unauthorized information access.
Proofcraft is a Silver Spo0nsor of the #seL4 Summit – thank you Proofcraft!
sel4.discourse.group/t/thank-you-...
sel4.discourse.group/t/thank-you-...
Thank you Proofcraft, silver sponsor of the seL4 Summit 2026
The seL4 Foundation thanks Proofcraft, silver sponsor of the seL4 Summit 2026. Founded by the seL4 verification leaders, Proofcraft offers commercial support and projects in formal verification in ge...
sel4.discourse.group
April 16, 2026 at 10:25 PM
Proofcraft is a Silver Spo0nsor of the #seL4 Summit – thank you Proofcraft!
sel4.discourse.group/t/thank-you-...
sel4.discourse.group/t/thank-you-...
WCET Reborn
In my talk at the #seL4 Summit I discussed how we have re-established seL4’s worst-case execution-time (WCET) analysis, making it, once more, the only protected-mode OS with a sound and complete timing analysis.
trustworthy.systems/publications...
In my talk at the #seL4 Summit I discussed how we have re-established seL4’s worst-case execution-time (WCET) analysis, making it, once more, the only protected-mode OS with a sound and complete timing analysis.
trustworthy.systems/publications...
TS | Trustworthy Systems R&D update
trustworthy.systems
September 22, 2026 at 3:52 AM
WCET Reborn
In my talk at the #seL4 Summit I discussed how we have re-established seL4’s worst-case execution-time (WCET) analysis, making it, once more, the only protected-mode OS with a sound and complete timing analysis.
trustworthy.systems/publications...
In my talk at the #seL4 Summit I discussed how we have re-established seL4’s worst-case execution-time (WCET) analysis, making it, once more, the only protected-mode OS with a sound and complete timing analysis.
trustworthy.systems/publications...
Regrettably I didn’t take a picture, but one of the coolest talks at the #seL4 Summit was Alexander Böttcher: “Sculpt OS – a dynamic, general-purpose OS powered by Genode on seL4”. It was presented on a laptop running Sculpt OS!
events.linuxfoundation.org/sel4-summit/...
events.linuxfoundation.org/sel4-summit/...
Schedule | LF Events
Please note: This schedule is automatically displayed in Central European Summer Time (CEST / UTC+2). To see the schedule in your preferred timezone, please select from the drop-down menu to the right...
events.linuxfoundation.org
September 8, 2025 at 6:34 AM
Regrettably I didn’t take a picture, but one of the coolest talks at the #seL4 Summit was Alexander Böttcher: “Sculpt OS – a dynamic, general-purpose OS powered by Genode on seL4”. It was presented on a laptop running Sculpt OS!
events.linuxfoundation.org/sel4-summit/...
events.linuxfoundation.org/sel4-summit/...
We need to invent ICE from Neuromancer.
Or we need to move everything to seL4 and capabilities-based security.
Or, seL4 is ICE from Neuromancer
Or we need to move everything to seL4 and capabilities-based security.
Or, seL4 is ICE from Neuromancer
September 10, 2026 at 1:28 PM
We need to invent ICE from Neuromancer.
Or we need to move everything to seL4 and capabilities-based security.
Or, seL4 is ICE from Neuromancer
Or we need to move everything to seL4 and capabilities-based security.
Or, seL4 is ICE from Neuromancer
New #seL4 (16.0.0) released!
A matching Microkit release (2.3.0) is out as well:
sel4.systems/news/#07-22
A matching Microkit release (2.3.0) is out as well:
sel4.systems/news/#07-22
seL4 News | seL4
sel4.systems
July 23, 2026 at 2:37 AM
New #seL4 (16.0.0) released!
A matching Microkit release (2.3.0) is out as well:
sel4.systems/news/#07-22
A matching Microkit release (2.3.0) is out as well:
sel4.systems/news/#07-22
#seL4 release 15.0.0 is out!
Together with accompanying releases of Microkit, CAmkES, CapDL and rust-sel4.
sel4.systems/news/#03-31
Together with accompanying releases of Microkit, CAmkES, CapDL and rust-sel4.
sel4.systems/news/#03-31
seL4 News | seL4
sel4.systems
March 31, 2026 at 10:59 PM
#seL4 release 15.0.0 is out!
Together with accompanying releases of Microkit, CAmkES, CapDL and rust-sel4.
sel4.systems/news/#03-31
Together with accompanying releases of Microkit, CAmkES, CapDL and rust-sel4.
sel4.systems/news/#03-31
