CVE-2024-36916 Affecting cluster-md-kmp-default package, versions <6.4.0-150600.23.14.2
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Test your applications- Snyk ID SNYK-SLES156-CLUSTERMDKMPDEFAULT-7552201
- published 23 Jul 2024
- disclosed 22 Jul 2024
Introduced: 22 Jul 2024
CVE-2024-36916 Open this link in a new tabHow to fix?
Upgrade SLES:15.6 cluster-md-kmp-default to version 6.4.0-150600.23.14.2 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream cluster-md-kmp-default package and not the cluster-md-kmp-default package as distributed by SLES.
See How to fix? for SLES:15.6 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
blk-iocost: avoid out of bounds shift
UBSAN catches undefined behavior in blk-iocost, where sometimes iocg->delay is shifted right by a number that is too large, resulting in undefined behavior on some architectures.
[ 186.556576] ------------[ cut here ]------------ UBSAN: shift-out-of-bounds in block/blk-iocost.c:1366:23 shift exponent 64 is too large for 64-bit type 'u64' (aka 'unsigned long long') CPU: 16 PID: 0 Comm: swapper/16 Tainted: G S E N 6.9.0-0_fbk700_debug_rc2_kbuilder_0_gc85af715cac0 #1 Hardware name: Quanta Twin Lakes MP/Twin Lakes Passive MP, BIOS F09_3A23 12/08/2020 Call Trace: <IRQ> dump_stack_lvl+0x8f/0xe0 __ubsan_handle_shift_out_of_bounds+0x22c/0x280 iocg_kick_delay+0x30b/0x310 ioc_timer_fn+0x2fb/0x1f80 __run_timer_base+0x1b6/0x250 ...
Avoid that undefined behavior by simply taking the "delay = 0" branch if the shift is too large.
I am not sure what the symptoms of an undefined value delay will be, but I suspect it could be more than a little annoying to debug.
References
- https://www.suse.com/security/cve/CVE-2024-36916.html
- https://bugzilla.suse.com/1225759
- https://git.kernel.org/stable/c/488dc6808cb8369685f18cee81e88e7052ac153b
- https://git.kernel.org/stable/c/62accf6c1d7b433752cb3591bba8967b7a801ad5
- https://git.kernel.org/stable/c/844fc023e9f14a4fb1de5ae1eaefafd6d69c5fa1
- https://git.kernel.org/stable/c/beaa51b36012fad5a4d3c18b88a617aea7a9b96d
- https://git.kernel.org/stable/c/ce0e99cae00e3131872936713b7f55eefd53ab86
- https://git.kernel.org/stable/c/f6add0a6f78dc6360b822ca4b6f9f2f14174c8ca
- https://lists.debian.org/debian-lts-announce/2024/06/msg00019.html