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CVE-2021-33574

glibc: mq_notify does not handle separately allocated thread attributes

The mq_notify function in the GNU C Library (aka glibc) versions 2.32 and 2.33 has a use-after-free. It may use the notification thread attributes object (passed through its struct sigevent parameter) after it has been freed by the caller, leading to a denial of service (application crash) or possibly unspecified other impact.

CVSS 3.1 · 9.8 Critical EPSS 3.5% KEV · Not listed
Vendors
Debian Fedoraproject Gnu and 2 more
Products
Debian Linux Fedora Glibc and 18 more
CVE-2021-28041

openssh: double-free memory corruption may lead to arbitrary code execution

ssh-agent in OpenSSH before 8.5 has a double free that may be relevant in a few less-common scenarios, such as unconstrained agent-socket access on a legacy operating system, or the forwarding of an agent to an attacker-controlled host.

CVSS 3.1 · 7.1 High EPSS 3.5% KEV · Not listed
Vendors
Fedoraproject Netapp Openbsd and 1 more
Products
Fedora Cloud Backup Hci Compute Node and 8 more
CVE-2021-27645

glibc: Use-after-free in addgetnetgrentX function in netgroupcache.c

The nameserver caching daemon (nscd) in the GNU C Library (aka glibc or libc6) 2.29 through 2.33, when processing a request for netgroup lookup, may crash due to a double-free, potentially resulting in degraded service or Denial of Service on the local system. This is related to netgroupcache.c.

CVSS 3.1 · 2.5 Low EPSS < 1% KEV · Not listed
Vendors
Debian Fedoraproject Gnu and 1 more
Products
Debian Linux Fedora Glibc and 1 more
CVE-2021-22945

curl: use-after-free and double-free in MQTT sending

When sending data to an MQTT server, libcurl <= 7.73.0 and 7.78.0 could in some circumstances erroneously keep a pointer to an already freed memory area and both use that again in a subsequent call to send data and also free it *again*.

CVSS 3.1 · 9.1 Critical EPSS 6.7% KEV · Not listed
Vendors
Apple Debian Fedoraproject and 5 more
Products
Macos Debian Linux Fedora and 22 more
CVE-2021-22901

curl: Use-after-free in TLS session handling when using OpenSSL TLS backend

curl 7.75.0 through 7.76.1 suffers from a use-after-free vulnerability resulting in already freed memory being used when a TLS 1.3 session ticket arrives over a connection. A malicious server can use this in rare unfortunate circumstances to potentially reach remote code execution in the client. When libcurl at run-time sets up support for TLS 1.3 session tickets on a connection using OpenSSL, it stores pointers to the transfer in-memory object for later retrieval when a session ticket arrives. If the connection is used by multiple transfers (like with a reused HTTP/1.1 connection or multiplexed HTTP/2 connection) that first transfer object might be freed before the new session is established on that connection and then the function will access a memory buffer that might be freed. When using that memory, libcurl might even call a function pointer in the object, making it possible for a remote code execution if the server could somehow manage to get crafted memory content into the correct place in memory.

CVSS 3.1 · 8.1 High EPSS 63.5% KEV · Not listed
Vendors
Haxx Netapp Oracle and 3 more
Products
Curl Active Iq Unified Manager Cloud Backup and 32 more
CVE-2021-20232

gnutls: Use after free in client_send_params in lib/ext/pre_shared_key.c

A flaw was found in gnutls. A use after free issue in client_send_params in lib/ext/pre_shared_key.c may lead to memory corruption and other potential consequences.

CVSS 3.1 · 9.8 Critical EPSS 3.4% KEV · Not listed
Vendors
Fedoraproject Gnu Redhat
Products
Fedora Gnutls Enterprise Linux
CVE-2021-20227

sqlite: potential use-after-free bug when processing a subquery with both a correlated WHERE clause and a "HAVING 0" clause and where the parent query is an aggregate

A flaw was found in SQLite's SELECT query functionality (src/select.c). This flaw allows an attacker who is capable of running SQL queries locally on the SQLite database to cause a denial of service or possible code execution by triggering a use-after-free. The highest threat from this vulnerability is to system availability.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
Vendors
Oracle Sqlite
Products
Communications Network Charging And Control Enterprise Manager For Oracle Database Jd Edwards Enterpriseone Tools and 4 more
CVE-2021-3518

libxml2: Use-after-free in xmlXIncludeDoProcess() in xinclude.c

There's a flaw in libxml2 in versions before 2.9.11. An attacker who is able to submit a crafted file to be processed by an application linked with libxml2 could trigger a use-after-free. The greatest impact from this flaw is to confidentiality, integrity, and availability.

CVSS 3.1 · 8.8 High EPSS 21.9% KEV · Not listed
Vendors
Debian Fedoraproject Netapp and 3 more
Products
Debian Linux Fedora Active Iq Unified Manager and 17 more
CVE-2021-3516

libxml2: Use-after-free in xmlEncodeEntitiesInternal() in entities.c

There's a flaw in libxml2's xmllint in versions before 2.9.11. An attacker who is able to submit a crafted file to be processed by xmllint could trigger a use-after-free. The greatest impact of this flaw is to confidentiality, integrity, and availability.

CVSS 3.1 · 7.8 High EPSS 2.0% KEV · Not listed
Vendors
Debian Fedoraproject Netapp and 3 more
Products
Debian Linux Fedora Clustered Data Ontap and 7 more
CVE-2020-21913

icu: Use after free in pkg_createWithAssemblyCode function in tools/pkgdata/pkgdata.cpp

International Components for Unicode (ICU-20850) v66.1 was discovered to contain a use after free bug in the pkg_createWithAssemblyCode function in the file tools/pkgdata/pkgdata.cpp.

CVSS 3.1 · 5.5 Medium EPSS 1.2% KEV · Not listed
Vendors
Debian Unicode
Products
Debian Linux International Components For Unicode
CVE-2020-13630

sqlite: Use-after-free in fts3EvalNextRow in ext/fts3/fts3.c

ext/fts3/fts3.c in SQLite before 3.32.0 has a use-after-free in fts3EvalNextRow, related to the snippet feature.

CVSS 3.1 · 7.0 High EPSS 1.0% KEV · Not listed
Vendors
Apple Broadcom Canonical and 7 more
Products
Icloud Ipados Iphone Os and 18 more
CVE-2020-1752

glibc: use-after-free in glob() function when expanding ~user

A use-after-free vulnerability introduced in glibc upstream version 2.14 was found in the way the tilde expansion was carried out. Directory paths containing an initial tilde followed by a valid username were affected by this issue. A local attacker could exploit this flaw by creating a specially crafted path that, when processed by the glob function, would potentially lead to arbitrary code execution. This was fixed in version 2.32.

CVSS 3.1 · 7 High EPSS < 1% KEV · Not listed
Vendors
Canonical Debian Gnu and 2 more
Products
Ubuntu Linux Debian Linux Glibc and 7 more
CVE-2020-1712

systemd: use-after-free when asynchronous polkit queries are performed

A heap use-after-free vulnerability was found in systemd before version v245-rc1, where asynchronous Polkit queries are performed while handling dbus messages. A local unprivileged attacker can abuse this flaw to crash systemd services or potentially execute code and elevate their privileges, by sending specially crafted dbus messages.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Debian Redhat Systemd Project
Products
Debian Linux Ceph Storage Discovery and 5 more
CVE-2019-20795

iproute: use-after-free in get_netnsid_from_name in ip/ipnetns.c

iproute2 before 5.1.0 has a use-after-free in get_netnsid_from_name in ip/ipnetns.c. NOTE: security relevance may be limited to certain uses of setuid that, although not a default, are sometimes a configuration option offered to end users. Even when setuid is used, other factors (such as C library configuration) may block exploitability.

CVSS 3.1 · 4.4 Medium EPSS < 1% KEV · Not listed
Vendors
Canonical Iproute2 Project
Products
Ubuntu Linux Iproute2