CVE-2024-49933

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2024-49933
In the Linux kernel, the following vulnerability has been resolved: blk_iocost: fix more out of bound shifts Recently running UBSAN caught few out of bound shifts in the ioc_forgive_debts() function: UBSAN: shift-out-of-bounds in block/blk-iocost.c:2142:38 shift exponent 80 is too large for 64-bit type 'u64' (aka 'unsigned long long') ... UBSAN: shift-out-of-bounds in block/blk-iocost.c:2144:30 shift exponent 80 is too large for 64-bit type 'u64' (aka 'unsigned long long') ... Call Trace: <IRQ> dump_stack_lvl+0xca/0x130 __ubsan_handle_shift_out_of_bounds+0x22c/0x280 ? __lock_acquire+0x6441/0x7c10 ioc_timer_fn+0x6cec/0x7750 ? blk_iocost_init+0x720/0x720 ? call_timer_fn+0x5d/0x470 call_timer_fn+0xfa/0x470 ? blk_iocost_init+0x720/0x720 __run_timer_base+0x519/0x700 ... Actual impact of this issue was not identified but I propose to fix the undefined behaviour. The proposed fix to prevent those out of bound shifts consist of precalculating exponent before using it the shift operations by taking min value from the actual exponent and maximum possible number of bits.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/1ab2cfe19700fb3dde4c7dfec392acff34db3120 Patch
https://git.kernel.org/stable/c/1b120f151871eb47ce9f283c007af3f8ae1d990e Patch
https://git.kernel.org/stable/c/1f61d509257d6a05763d05bf37943b35306522b1 Patch
https://git.kernel.org/stable/c/364022095bdd4108efdaaa68576afa4712a5d085 Patch
https://git.kernel.org/stable/c/59121bb38fdc01434ea3fe361ee02b59f036227f Patch
https://git.kernel.org/stable/c/9bce8005ec0dcb23a58300e8522fe4a31da606fa Patch
https://git.kernel.org/stable/c/f4ef9bef023d5c543cb0f3194ecacfd47ef590ec Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
History

13 Nov 2024, 15:09

Type Values Removed Values Added
First Time Linux linux Kernel
Linux
CWE NVD-CWE-noinfo
References () https://git.kernel.org/stable/c/1ab2cfe19700fb3dde4c7dfec392acff34db3120 - () https://git.kernel.org/stable/c/1ab2cfe19700fb3dde4c7dfec392acff34db3120 - Patch
References () https://git.kernel.org/stable/c/1b120f151871eb47ce9f283c007af3f8ae1d990e - () https://git.kernel.org/stable/c/1b120f151871eb47ce9f283c007af3f8ae1d990e - Patch
References () https://git.kernel.org/stable/c/1f61d509257d6a05763d05bf37943b35306522b1 - () https://git.kernel.org/stable/c/1f61d509257d6a05763d05bf37943b35306522b1 - Patch
References () https://git.kernel.org/stable/c/364022095bdd4108efdaaa68576afa4712a5d085 - () https://git.kernel.org/stable/c/364022095bdd4108efdaaa68576afa4712a5d085 - Patch
References () https://git.kernel.org/stable/c/59121bb38fdc01434ea3fe361ee02b59f036227f - () https://git.kernel.org/stable/c/59121bb38fdc01434ea3fe361ee02b59f036227f - Patch
References () https://git.kernel.org/stable/c/9bce8005ec0dcb23a58300e8522fe4a31da606fa - () https://git.kernel.org/stable/c/9bce8005ec0dcb23a58300e8522fe4a31da606fa - Patch
References () https://git.kernel.org/stable/c/f4ef9bef023d5c543cb0f3194ecacfd47ef590ec - () https://git.kernel.org/stable/c/f4ef9bef023d5c543cb0f3194ecacfd47ef590ec - Patch
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5

23 Oct 2024, 15:13

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: blk_iocost: corrige más cambios fuera de los límites Recientemente, la ejecución de UBSAN detectó algunos cambios fuera de los límites en la función ioc_forgive_debts(): UBSAN: cambio fuera de los límites en block/blk-iocost.c:2142:38 el exponente de cambio 80 es demasiado grande para el tipo de 64 bits 'u64' (también conocido como 'unsigned long long') ... UBSAN: cambio fuera de los límites en block/blk-iocost.c:2144:30 el exponente de cambio 80 es demasiado grande para el tipo de 64 bits 'u64' (también conocido como 'unsigned long long') ... Seguimiento de llamadas: dump_stack_lvl+0xca/0x130 __ubsan_handle_shift_out_of_bounds+0x22c/0x280 ? __lock_acquire+0x6441/0x7c10 ioc_timer_fn+0x6cec/0x7750 ? blk_iocost_init+0x720/0x720 ? call_timer_fn+0x5d/0x470 call_timer_fn+0xfa/0x470 ? blk_iocost_init+0x720/0x720 __run_timer_base+0x519/0x700 ... No se identificó el impacto real de este problema, pero propongo corregir el comportamiento indefinido. La solución propuesta para evitar esos cambios fuera de los límites consiste en precalcular el exponente antes de usarlo en las operaciones de cambio tomando el valor mínimo del exponente real y la cantidad máxima posible de bits.

21 Oct 2024, 18:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-10-21 18:15

Updated : 2024-11-13 15:09

NVD link : CVE-2024-49933

Mitre link : CVE-2024-49933

CVE.ORG link : CVE-2024-49933

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
NVD-CWE-noinfo