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Registered in England and Wales under Company Registration No. 3798903 From: David Howells In-Reply-To: <1ce413b202ca7c008e077a6f1cfa88f94a3a7cbd.camel@redhat.com> References: <1ce413b202ca7c008e077a6f1cfa88f94a3a7cbd.camel@redhat.com> <501216.1749826470@warthog.procyon.org.uk> <3081793dc1d846dccef07984520fc544f709ca84.camel@HansenPartnership.com> <7ad6d5f61d6cd602241966476252599800c6a304.camel@redhat.com> <69775877d04b8ee9f072adfd2c595187997e59fb.camel@HansenPartnership.com> <3d650cc9ff07462e5c55cc3d9c0da72a3f2c5df2.camel@redhat.com> <534145.1762588015@warthog.procyon.org.uk> To: Simo Sorce Cc: dhowells@redhat.com, "Elliott, Robert (Servers)" , James Bottomley , Ignat Korchagin , Herbert Xu , Stephan Mueller , "torvalds@linux-foundation.org" , Paul Moore , Lukas Wunner , Clemens Lang , David Bohannon , Roberto Sassu , "keyrings@vger.kernel.org" , "linux-crypto@vger.kernel.org" , "linux-security-module@vger.kernel.org" , "linux-kernel@vger.kernel.org" Subject: Re: Module signing and post-quantum crypto public key algorithms Precedence: bulk X-Mailing-List: linux-crypto@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <990171.1762886312.1@warthog.procyon.org.uk> Date: Tue, 11 Nov 2025 18:38:32 +0000 Message-ID: <990172.1762886312@warthog.procyon.org.uk> X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.111 Simo Sorce wrote: > If a defect in a signing algorithm is found you can simply distribute a > new kernel with modules resigned with a different algorithm. Probably more "have to" than "can". The cert providing the composite key for both would have to be invalidated to stop it from being used - and invalidated by having it added to the UEFI dbx table. David