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CVE-2024-36916

Status Candidate

Overview

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.

Related Files

Ubuntu Security Notice USN-6950-4
Posted Aug 22, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6950-4 - Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system.

tags | advisory, kernel
systems | linux, ubuntu
advisories | CVE-2023-52585, CVE-2024-26900, CVE-2024-26936, CVE-2024-26980, CVE-2024-35848, CVE-2024-36017, CVE-2024-36031, CVE-2024-36880, CVE-2024-36897, CVE-2024-36902, CVE-2024-36906, CVE-2024-36916, CVE-2024-36919, CVE-2024-36929
SHA-256 | 2ffb7a8fcdb048d1878d536775b9a5dc1a6dfde0457ba9427be3df3622cc57cd
Download | Favorite | View
Ubuntu Security Notice USN-6950-3
Posted Aug 14, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6950-3 - Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system.

tags | advisory, kernel
systems | linux, ubuntu
advisories | CVE-2023-52585, CVE-2024-26900, CVE-2024-26936, CVE-2024-26980, CVE-2024-35848, CVE-2024-36017, CVE-2024-36031, CVE-2024-36880, CVE-2024-36897, CVE-2024-36906, CVE-2024-36916, CVE-2024-36919, CVE-2024-36929, CVE-2024-36933
SHA-256 | 91f8a2f2abe5b38323a12e231eedb404e066a524561a85415eb8107933df16bf
Download | Favorite | View
Ubuntu Security Notice USN-6950-2
Posted Aug 13, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6950-2 - Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system.

tags | advisory, kernel
systems | linux, ubuntu
advisories | CVE-2023-52585, CVE-2024-26900, CVE-2024-26936, CVE-2024-26980, CVE-2024-35848, CVE-2024-36017, CVE-2024-36031, CVE-2024-36880, CVE-2024-36897, CVE-2024-36906, CVE-2024-36916, CVE-2024-36919, CVE-2024-36929, CVE-2024-36933
SHA-256 | 104ac502cb413414c029ce1afea7a7125c6a91b2c0b2f41ab80523d51200d7f0
Download | Favorite | View
Ubuntu Security Notice USN-6950-1
Posted Aug 9, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6950-1 - Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system.

tags | advisory, kernel
systems | linux, ubuntu
advisories | CVE-2023-52585, CVE-2024-26900, CVE-2024-26936, CVE-2024-26980, CVE-2024-35848, CVE-2024-36017, CVE-2024-36031, CVE-2024-36880, CVE-2024-36897, CVE-2024-36906, CVE-2024-36916, CVE-2024-36919, CVE-2024-36929, CVE-2024-36933
SHA-256 | 520384544fee23ad6e708dc62b10e258d9da95523db931b26ecc05e116e68e8c
Download | Favorite | View
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