--===============2526203196538564823==
Content-Type: multipart/signed; micalg=pgp-sha512;
	protocol="application/pgp-signature";
 boundary="k+fx0ZAZLueIeWQD"
Content-Disposition: inline


--k+fx0ZAZLueIeWQD
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline

==========================================================================
Ubuntu Security Notice USN-5117-1
October 20, 2021

linux-oem-5.13 vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-oem-5.13: Linux kernel for OEM systems

Details:

It was discovered that the btrfs file system in the Linux kernel did not
properly handle removing a non-existent device id. An attacker with
CAP_SYS_ADMIN could use this to cause a denial of service. (CVE-2021-3739)

It was discovered that the Qualcomm IPC Router protocol implementation in
the Linux kernel did not properly validate metadata in some situations. A
local attacker could use this to cause a denial of service (system crash)
or expose sensitive information. (CVE-2021-3743)

It was discovered that the virtual terminal (vt) device implementation in
the Linux kernel contained a race condition in its ioctl handling that led
to an out-of-bounds read vulnerability. A local attacker could possibly use
this to expose sensitive information. (CVE-2021-3753)

It was discovered that the Linux kernel did not properly account for the
memory usage of certain IPC objects. A local attacker could use this to
cause a denial of service (memory exhaustion). (CVE-2021-3759)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.04 LTS:
  linux-image-5.13.0-1017-oem     5.13.0-1017.21
  linux-image-oem-20.04c          5.13.0.1017.21

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References:
  https://ubuntu.com/security/notices/USN-5117-1
  CVE-2021-3739, CVE-2021-3743, CVE-2021-3753, CVE-2021-3759

Package Information:
  https://launchpad.net/ubuntu/+source/linux-oem-5.13/5.13.0-1017.21


--k+fx0ZAZLueIeWQD
Content-Type: application/pgp-signature; name="signature.asc"

-----BEGIN PGP SIGNATURE-----
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=n9fi
-----END PGP SIGNATURE-----

--k+fx0ZAZLueIeWQD--


--===============2526203196538564823==
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: base64
Content-Disposition: inline

-- 
ubuntu-security-announce mailing list
ubuntu-security-announce@lists.ubuntu.com
Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-security-announce