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envelope-from=borntraeger@linux.ibm.com; helo=mx0b-001b2d01.pphosted.com X-Spam_score_int: -26 X-Spam_score: -2.7 X-Spam_bar: -- X-Spam_report: (-2.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Am 27.07.26 um 14:14 schrieb Cornelia Huck: > On Mon, Jul 27 2026, Christian Borntraeger wrote: > >> Cornelia, Eric, Matt, >> >> here are 5 more fixes for hardening QEMU against invalid input. Nothing >> is strictly a security issues as defined in the policy. For example >> https://qemu-project.gitlab.io/qemu/system/security.html says assert / >> abort: If triggering the code path requires kernel privileges (or root >> account access) in the guest, asserts/aborts in QEMU are a self >> inflicted denial of service. These will not be treated as security >> flaws, at most hardening bugs. >> And if anyone can provide invalid boot loader content it can provide >> anything to boot if secure boot is not available. >> We should fix those anyway, probably even for 11.1 > > Fixing: yes. For 11.1: how easy are they to trigger? For the bios fixes, > I assume you need a broken/crafted disk image; I assume that for the > other two, you need some buggy/misbehaving guest. Did you actually > manage to trigger this via some kind of test case? Easy to trigger, but only with modified guests or modified zipls. Normal guests will not trigger those.