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bestouff 4 hours ago [-]
Lots of privilege escalations these days. But are there that many multiuser Linux systems nowadays ? I'm under the impression the whole landscape is either servers or single-user desktops (and ofc Android phones).
INTPenis 4 hours ago [-]
The idea is that you can exploit a service hosted on Linux to run these.
dathinab 3 hours ago [-]
> many multiuser Linux systems nowadays
not relevant IMHO
we don't live anymore in a time where you can trust that local apps do not misbehave, and in such a context LPE is pretty bad even in a single user system
just thing about all the supply chain problems of recent times
bestouff 1 hours ago [-]
I would say that in a single-user system LPE isn't even needed. The moment you run malicious code all bets are off. No need to compromise the system when all your data is under "enemy" control.
zahlman 3 hours ago [-]
I impersonate multiple users on my machine for organizational reasons.
LPEs also potentially make user-level malware into system-level malware, which is only marginally more impactful for a single person on a desktop, but considerably harder to clean up. (It also broadens the range of what such malware could exfiltrate from me.)
riedel 2 hours ago [-]
Many university HPC clusters are run multiuser. At least login nodes.
nubinetwork 3 hours ago [-]
At what point do we all start rolling our own microkernels? This is kind of getting silly now... 4 now in the past month?
craftkiller 3 hours ago [-]
I hate that the Qubes OS people were right.
itintheory 4 hours ago [-]
Sounds like this one is in the same kernel modules as dirtyfrag, so the existing mitigations (if in place) are sufficient.
not relevant IMHO
we don't live anymore in a time where you can trust that local apps do not misbehave, and in such a context LPE is pretty bad even in a single user system
just thing about all the supply chain problems of recent times
LPEs also potentially make user-level malware into system-level malware, which is only marginally more impactful for a single person on a desktop, but considerably harder to clean up. (It also broadens the range of what such malware could exfiltrate from me.)
https://access.redhat.com/security/vulnerabilities/RHSB-2026...
https://aws.amazon.com/security/security-bulletins/2026-027-...
That one also includes disabling user namespaces. Could be problematic if they're in use.