A kernel security update has been released for Slackware Linux 14.2.

slackware-security: Slackware 14.2 kernel (SSA:2021-202-01)

Slackware 14.2 kernel (SSA:2021-202-01)

New kernel packages are available for Slackware 14.2 to fix a security issue.

Here are the details from the Slackware 14.2 ChangeLog:
+--------------------------+
Wed Jul 21 05:30:44 UTC 2021
patches/packages/linux-4.4.276/*: Upgraded.
These updates fix various bugs and security issues, including the recently
announced local privilege escalation vulnerability in the filesystem layer
(CVE-2021-33909).
Be sure to upgrade your initrd after upgrading the kernel packages.
If you use lilo to boot your machine, be sure lilo.conf points to the correct
kernel and initrd and run lilo as root to update the bootloader.
If you use elilo to boot your machine, you should run eliloconfig to copy the
kernel and initrd to the EFI System Partition.
For more information, see:
  https://www.qualys.com/2021/07/20/cve-2021-33909/sequoia-local-privilege-escalation-linux.txt
Fixed in 4.4.262:
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19060
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19061
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28660
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20261
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29265
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-16232
Fixed in 4.4.263:
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28964
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28972
Fixed in 4.4.264:
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28688
Fixed in 4.4.265:
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3483
Fixed in 4.4.266:
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29154
Fixed in 4.4.267:
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-22555
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25672
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25673
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25670
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25671
Fixed in 4.4.269:
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33034
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-0605
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-31916
Fixed in 4.4.270:
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-26558
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-0129
Fixed in 4.4.271:
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-24587
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-24586
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-24588
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-26139
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-26147
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29650
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-32399
Fixed in 4.4.272:
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3564
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3573
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3587
Fixed in 4.4.274:
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34693
Fixed in 4.4.276:
  https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33909
(* Security fix *)
+--------------------------+

Where to find the new packages:
+-----------------------------+

Thanks to the friendly folks at the OSU Open Source Lab
(  http://osuosl.org) for donating FTP and rsync hosting
to the Slackware project! :-)

Also see the "Get Slack" section on   http://slackware.com for
additional mirror sites near you.

Updated packages for Slackware 14.2:
  ftp://ftp.slackware.com/pub/slackware/slackware-14.2/patches/packages/linux-4.4.276/kernel-generic-4.4.276-i586-1.txz
  ftp://ftp.slackware.com/pub/slackware/slackware-14.2/patches/packages/linux-4.4.276/kernel-generic-smp-4.4.276_smp-i686-1.txz
  ftp://ftp.slackware.com/pub/slackware/slackware-14.2/patches/packages/linux-4.4.276/kernel-headers-4.4.276_smp-x86-1.txz
  ftp://ftp.slackware.com/pub/slackware/slackware-14.2/patches/packages/linux-4.4.276/kernel-huge-4.4.276-i586-1.txz
  ftp://ftp.slackware.com/pub/slackware/slackware-14.2/patches/packages/linux-4.4.276/kernel-huge-smp-4.4.276_smp-i686-1.txz
  ftp://ftp.slackware.com/pub/slackware/slackware-14.2/patches/packages/linux-4.4.276/kernel-modules-4.4.276-i586-1.txz
  ftp://ftp.slackware.com/pub/slackware/slackware-14.2/patches/packages/linux-4.4.276/kernel-modules-smp-4.4.276_smp-i686-1.txz
  ftp://ftp.slackware.com/pub/slackware/slackware-14.2/patches/packages/linux-4.4.276/kernel-source-4.4.276_smp-noarch-1.txz

Updated packages for Slackware x86_64 14.2:
  ftp://ftp.slackware.com/pub/slackware/slackware64-14.2/patches/packages/linux-4.4.276/kernel-generic-4.4.276-x86_64-1.txz
  ftp://ftp.slackware.com/pub/slackware/slackware64-14.2/patches/packages/linux-4.4.276/kernel-headers-4.4.276-x86-1.txz
  ftp://ftp.slackware.com/pub/slackware/slackware64-14.2/patches/packages/linux-4.4.276/kernel-huge-4.4.276-x86_64-1.txz
  ftp://ftp.slackware.com/pub/slackware/slackware64-14.2/patches/packages/linux-4.4.276/kernel-modules-4.4.276-x86_64-1.txz
  ftp://ftp.slackware.com/pub/slackware/slackware64-14.2/patches/packages/linux-4.4.276/kernel-source-4.4.276-noarch-1.txz

MD5 signatures:
+-------------+

Slackware 14.2 packages:
7448b2c6b59a644676d96ab85712e61e kernel-generic-4.4.276-i586-1.txz
3bd670f094978f92f952e1413259f02e kernel-generic-smp-4.4.276_smp-i686-1.txz
f7641f1c4fd3f985e65678fef6b289de kernel-headers-4.4.276_smp-x86-1.txz
4c9e16c5c2fd3519f83dbbe73701901f kernel-huge-4.4.276-i586-1.txz
89e381bdb866be421437d1736158c523 kernel-huge-smp-4.4.276_smp-i686-1.txz
e724f693e995d3e09a29528afbbfb3d8 kernel-modules-4.4.276-i586-1.txz
2eb13babd21e5fcfb67e4a7340d585eb kernel-modules-smp-4.4.276_smp-i686-1.txz
4e5eedd4f157d239ce69661ee480c3cd kernel-source-4.4.276_smp-noarch-1.txz

Slackware x86_64 14.2 packages:
4fe4c95f02a3cbf102a1e55fb3fada4b kernel-generic-4.4.276-x86_64-1.txz
93d82f7afaa97d3883f823aed2cb1ab5 kernel-headers-4.4.276-x86-1.txz
daa4891c599c1f70caabeb034ee1714f kernel-huge-4.4.276-x86_64-1.txz
652ca6026a9db83a4a4b54416974101c kernel-modules-4.4.276-x86_64-1.txz
e3a3ef38df2b45bffddac8be360e7ff3 kernel-source-4.4.276-noarch-1.txz

Installation instructions:
+------------------------+

Upgrade the packages as root:
# upgradepkg kernel-*.txz

If you are using an initrd, you'll need to rebuild it.

For a 32-bit SMP machine, use this command (substitute the appropriate
kernel version if you are not running Slackware 14.2):
# /usr/share/mkinitrd/mkinitrd_command_generator.sh -k 4.4.276-smp | bash

For a 64-bit machine, or a 32-bit uniprocessor machine, use this command
(substitute the appropriate kernel version if you are not running
Slackware 14.2):
# /usr/share/mkinitrd/mkinitrd_command_generator.sh -k 4.4.276 | bash

Please note that "uniprocessor" has to do with the kernel you are running,
not with the CPU. Most systems should run the SMP kernel (if they can)
regardless of the number of cores the CPU has. If you aren't sure which
kernel you are running, run "uname -a". If you see SMP there, you are
running the SMP kernel and should use the 4.4.276-smp version when running
mkinitrd_command_generator. Note that this is only for 32-bit -- 64-bit
systems should always use 4.4.276 as the version.

If you are using lilo or elilo to boot the machine, you'll need to ensure
that the machine is properly prepared before rebooting.

If using LILO:
By default, lilo.conf contains an image= line that references a symlink
that always points to the correct kernel. No editing should be required
unless your machine uses a custom lilo.conf. If that is the case, be sure
that the image= line references the correct kernel file. Either way,
you'll need to run "lilo" as root to reinstall the boot loader.

If using elilo:
Ensure that the /boot/vmlinuz symlink is pointing to the kernel you wish
to use, and then run eliloconfig to update the EFI System Partition.