#usernamespace — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #usernamespace, aggregated by home.social.
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💥🔧 Ubuntu's #unprivileged user namespace restrictions are about as useful as a chocolate teapot, as revealed by three new bypasses. Meanwhile, #security advisories pile up like unread emails, and #Ubuntu users everywhere double down on their favorite pastime: keeping their fingers crossed. 🤞📧
https://seclists.org/oss-sec/2025/q1/253 #Bypass #UserNamespace #Vulnerabilities #HackerNews #ngated -
OSS-SEC: Three bypasses of Ubuntu's unprivileged user namespace restrictions
https://seclists.org/oss-sec/2025/q1/253
#HackerNews #OSSSEC #Ubuntu #Security #Vulnerabilities #UserNamespace #Bypasses #OpenSource
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#TIL: #Firefox on #Linux works fine with
user.max_user_namespaces = 0
as well as with
user.max_user_namespaces = 100
but not with
user.max_user_namespaces = 1
which seems to have been set by default on my #DebianUnstable since last week or so.
Also Firefox' error messages on the shell where I started it weren't really that helpful:
Failed to launch tab subprocess @fork (Error:28): file ipc/[…]
fork() failed: No space left on device: file ipc/[…] -
#TIL: #Firefox on #Linux works fine with
user.max_user_namespaces = 0
as well as with
user.max_user_namespaces = 100
but not with
user.max_user_namespaces = 1
which seems to have been set by default on my #DebianUnstable since last week or so.
Also Firefox' error messages on the shell where I started it weren't really that helpful:
Failed to launch tab subprocess @fork (Error:28): file ipc/[…]
fork() failed: No space left on device: file ipc/[…] -
#TIL: #Firefox on #Linux works fine with
user.max_user_namespaces = 0
as well as with
user.max_user_namespaces = 100
but not with
user.max_user_namespaces = 1
which seems to have been set by default on my #DebianUnstable since last week or so.
Also Firefox' error messages on the shell where I started it weren't really that helpful:
Failed to launch tab subprocess @fork (Error:28): file ipc/[…]
fork() failed: No space left on device: file ipc/[…] -
#TIL: #Firefox on #Linux works fine with
user.max_user_namespaces = 0
as well as with
user.max_user_namespaces = 100
but not with
user.max_user_namespaces = 1
which seems to have been set by default on my #DebianUnstable since last week or so.
Also Firefox' error messages on the shell where I started it weren't really that helpful:
Failed to launch tab subprocess @fork (Error:28): file ipc/[…]
fork() failed: No space left on device: file ipc/[…] -
#TIL: #Firefox on #Linux works fine with
user.max_user_namespaces = 0
as well as with
user.max_user_namespaces = 100
but not with
user.max_user_namespaces = 1
which seems to have been set by default on my #DebianUnstable since last week or so.
Also Firefox' error messages on the shell where I started it weren't really that helpful:
Failed to launch tab subprocess @fork (Error:28): file ipc/[…]
fork() failed: No space left on device: file ipc/[…]