CVE-2024-36916
blk-iocost: avoid out of bounds shift
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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.
En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: blk-iocost: evita cambios fuera de los límites UBSAN detecta un comportamiento indefinido en blk-iocost, donde a veces iocg->delay se desplaza hacia la derecha en un número demasiado grande, lo que resulta en un estado indefinido. comportamiento en algunas arquitecturas. [186.556576] ------------[ cortar aquí ]------------ UBSAN: desplazamiento fuera de los límites en block/blk-iocost.c:1366 :23 exponente de desplazamiento 64 es demasiado grande para el tipo de 64 bits 'u64' (también conocido como 'unsigned long long') CPU: 16 PID: 0 Comm: swapper/16 Tainted: GSEN 6.9.0-0_fbk700_debug_rc2_kbuilder_0_gc85af715cac0 #1 Nombre de hardware: Quanta Twin Lakes MP/Twin Lakes MP pasivo, BIOS F09_3A23 08/12/2020 Seguimiento de llamadas: dump_stack_lvl+0x8f/0xe0 __ubsan_handle_shift_out_of_bounds+0x22c/0x280 iocg_kick_delay+0x30b/0x310 ioc_timer_fn+0x2fb/0x 1f80 __run_timer_base+0x1b6/0x250 ... Evitar ese comportamiento indefinido simplemente tomando la rama "retraso = 0" si el cambio es demasiado grande. No estoy seguro de cuáles serán los síntomas de un retraso de valor indefinido, pero sospecho que podría ser más que molesto depurarlo.
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2024-05-30 CVE Reserved
- 2024-05-30 CVE Published
- 2024-05-31 EPSS Updated
- 2024-09-05 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
CAPEC
References (7)
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Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | < 5.10.217 Search vendor "Linux" for product "Linux Kernel" and version " < 5.10.217" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | < 5.15.159 Search vendor "Linux" for product "Linux Kernel" and version " < 5.15.159" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | < 6.1.91 Search vendor "Linux" for product "Linux Kernel" and version " < 6.1.91" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | < 6.6.31 Search vendor "Linux" for product "Linux Kernel" and version " < 6.6.31" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | < 6.8.10 Search vendor "Linux" for product "Linux Kernel" and version " < 6.8.10" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | < 6.9 Search vendor "Linux" for product "Linux Kernel" and version " < 6.9" | en |
Affected
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