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Urgent Resolution for rxrpc Vulnerabilities in Slackware 15.0 Kernel

slackware
Calendar Grey June 1, 2026
Dist Slackware Esm H88
New kernel packages for Slackware 15.0 address critical security risks with enhanced rxrpc functionalities.
New kernel packages are available for Slackware 15.0 and -current to fix security issues.

Summary

Here are the details from the Slackware 15.0 ChangeLog: patches/packages/linux-5.15.209/kernel-generic-5.15.209-i586-1.txz: Upgraded. This update fixes security issues: rxrpc: Fix missing validation of ticket length in non-XDR key preparsing rxrpc: Fix anonymous key handling rxrpc: only handle RESPONSE during service challenge rxrpc: Fix recvmsg() unconditional requeue rxrpc: reject undecryptable rxkad response tickets rxrpc: Fix call removal to use RCU safe deletion rxrpc: Fix key quota calculation for multitoken keys rxrpc: proc: size address buffers for %pISpc output For more information, see: https://www.cve.org/CVERecord?id=CVE-2026-31696 https://www.cve.org/CVERecord?id=CVE-2026-31676 https://www.cve.org/CVERecord?id=CVE-2026-23066 https://www.cve.org/CVERecord?id=CVE-2026-31637 https://www.cve.org/CVERecord?id=CVE-2026-31642 https://www.cve.org/CVERecord?id=CVE-2026-31630 (* Security fix

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Topics%20covered

Topics Covered

security advisory critical security fix slackware kernel issue rxrpc

Where Find 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 15.0: ftp://ftp.slackware.com/pub/slackware/slackware-15.0/patches/packages/linux-5.15.209/kernel-generic-5.15.209-i586-1.txz ftp://ftp.slackware.com/pub/slackware/slackware-15.0/patches/packages/linux-5.15.209/kernel-generic-smp-5.15.209_smp-i686-1.txz ftp://ftp.slackware.com/pub/slackware/slackware-15.0/patches/packages/linux-5.15.209/kernel-headers-5.15.209_smp-x86-1.txz ftp://ftp.slackware.com/pub/slackware/slackware-15.0/patches/packages/linux-5.15.209/kernel-huge-5.15.209-i586-1.txz ftp://ftp.slackware.com/pub/slackware/slackware-15.0/patches/packages/linux-5.15.209/kernel-huge-smp-5.15.209_smp-i686-1.txz ftp://ftp.slackware.com/pub/slackware/slackware-15.0/patches/packages/linux-5.15.209/kernel-modules-5.15.209-i...

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MD5 Signatures

Slackware 15.0 packages: 0087a3143a15048e6ba145f2a084191d kernel-generic-5.15.209-i586-1.txz 61b381a97c64d49ae6df95c218749380 kernel-generic-smp-5.15.209_smp-i686-1.txz 5619040f39e7e941b5496c54cf7cbee6 kernel-headers-5.15.209_smp-x86-1.txz 4ca45f7cc6ca2f3ba83a0ecb95a8a8a6 kernel-huge-5.15.209-i586-1.txz b83be05421f475a23ef8f03bdeda5f78 kernel-huge-smp-5.15.209_smp-i686-1.txz 4a10e71a859bb91d2afecad49d115cf1 kernel-modules-5.15.209-i586-1.txz e6c5e1f1aa0f6065c9b291b28040970d kernel-modules-smp-5.15.209_smp-i686-1.txz 30f9fa767297bca0150fdb6fd09ed842 kernel-source-5.15.209_smp-noarch-1.txz
Slackware x86_64 15.0 packages: a4dfa657205a1604a7304375dcc447ef kernel-generic-5.15.209-x86_64-1.txz ec28794ae0823c076bb446fb92056e88 kernel-headers-5.15.209-x86-1.txz af313da2ce014d5696164f7a900afb61 kernel-huge-5.15.209-x86_64-1.txz 79dab68b6ff91292360784a89a275512 kernel-modules-5.15.209-x86_64-1.txz d21fb99c8a00aeee290c1dec6050d783 kernel-source-5.15.209-noarch-1.txz
Slackware -current packages: 1e786beda07ffc5e75865efb27eda603 kernel-firmware-20260529_d953ad8-noarch-1.txz e3e59a5f0ca8fdcbea2b35580c14fef1 kernel-generic-6.12.92-i686-1.txz 2e86867ab7888573637062568a89236a kernel-headers-6.12.92-x86-1.txz 1ea8aeaaa7a1fd5438d06be1ce82de69 kernel-source-6.12.92-noarch-1.txz 0da6557abf8fc3a4672ffa0d4e29b704 kernel-generic-6.18.34-i686-1.txz a1c2fda540370f8641fe411158673ff2 kernel-headers-6.18.34-x86-1.txz 89dcca6a8f587653b131e344e8f292a8 kernel-source-6.18.34-noarch-1.txz 4d69cd5a69cf01010b2c703e19215802 kernel-generic-7.0.11-i686-1.txz 1c194dfcbd015aa8b21c3e8b9acf385b kernel-headers-7.0.11-x86-1.txz d804983f50a917f0d302fb3e5d1996ef kernel-source-7.0.11-noarch-1.txz
Slackware x86_64 -current packages: 1e786beda07ffc5e75865efb27eda603 kernel-firmware-20260529_d953ad8-noarch-1.txz 58878534d2b789e986f521f960605856 kernel-generic-6.18.34-x86_64-1.txz 04867dfa23926a9d626a9731a1beb035 kernel-headers-6.18.34-x86-1.txz 21cfe4f290df8d8bd87cbd4c66024d60 kernel-source-6.18.34-noarch-1.txz f66140c36afa287308d6f56def01e64b kernel-generic-7.0.11-x86_64-1.txz e00d3dfdf5e137dfb8d83b4c19313cad kernel-headers-7.0.11-x86-1.txz 2018ef751d6873adc9c4ff06810d2f68 kernel-source-7.0.11-noarch-1.txz

Severity
critical
Lowest
Low
Medium
High
Critical

Topics%20covered

Topics Covered

security advisory critical security fix slackware kernel issue rxrpc

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Installation Instructions

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 15.0): # /usr/share/mkinitrd/mkinitrd_command_generator.sh -k 5.15.209-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 15.0): # /usr/share/mkinitrd/mkinitrd_command_generator.sh -k 5.15.209 | 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 5.15.209-smp version when running mkinitrd_command_generator. Note that this is only for 32-bit -- 64-bit systems should always use 5.15.209 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.

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