Bubblewrap (bwrap) before version 0.4.1, if installed in setuid mode and the kernel supports unprivileged user namespaces, then the bwrap --userns2 option can be used to make the setuid process keep running as root while being traceable. This can in turn be used to gain root permissions. Note that this only affects the combination of bubblewrap in setuid mode (which is typically used when unprivileged user namespaces are not supported) and the support of unprivileged user namespaces. Known to be affected are: Debian testing/unstable, if unprivileged user namespaces enabled (not default) Debian buster-backports, if unprivileged user namespaces enabled (not default) Arch if using linux-hardened, if unprivileged user namespaces enabled (not default) Centos 7 flatpak COPR, if unprivileged user namespaces enabled (not default) This has been fixed in the 0.4.1 release, and all affected users should update.

cyrus-sasl (aka Cyrus SASL) 2.1.27 has an out-of-bounds write leading to unauthenticated remote denial-of-service in OpenLDAP via a malformed LDAP packet. The OpenLDAP crash is ultimately caused by an off-by-one error in sasladdstring in common.c in cyrus-sasl.

A flaw was found in the way the Linux kernel loaded ELF executables. Provided that an application was built as Position Independent Executable (PIE), the loader could allow part of that application's data segment to map over the memory area reserved for its stack, potentially resulting in memory corruption. An unprivileged local user with access to SUID (or otherwise privileged) PIE binary could use this flaw to escalate their privileges on the system.

Upstream patch:

https://git.kernel.org/linus/a87938b2e246b81b4fb713edb371a9fa3c5c3c86

Unspecified vulnerability in EMC Documentum Content Server 6.0, 6.5 before SP2 P02, 6.5 SP3 before SP3 P02, and 6.6 before P02 allows local users to obtain "highest super user privileges" by leveraging system administrator privileges.

Red Hat Enterprise Linux 5 and Fedora install the Bind /etc/rndc.key file with world-readable permissions, which allows local users to perform unauthorized named commands, such as causing a denial of service by stopping named.