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CVE-2023-31085

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Date: April 23, 2023

An issue was discovered in drivers/mtd/ubi/cdev.c in the Linux kernel 6.2. There is a divide-by-zero error in do_div(sz,mtd->erasesize), used indirectly by ctrl_cdev_ioctl, when mtd->erasesize is 0.

Language: C

Severity Score

Related Resources (7)

https://lore.kernel.org/all/687864524.118195.1681799447034.JavaMail.zimbra%40nod.at/
https://lore.kernel.org/all/687864524.118195.1681799447034.JavaMail.zimbra@nod.at/
https://access.redhat.com/security/cve/CVE-2023-31085
https://security.netapp.com/advisory/ntap-20230929-0003/
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=017c73a34a661a861712f7cc1393a123e5b2208c
https://nvd.nist.gov/vuln/detail/CVE-2023-31085
https://www.mend.io/vulnerability-database/CVE-2023-31085

Severity Score

Weakness Type (CWE)

Divide By Zero

CWE-369

Top Fix

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Upgrade Version

Upgrade to version linux-yocto - 4.8.26+gitAUTOINC+1c60e003c7_27efc3ba68;linux-yocto - 4.10+gitAUTOINC+805ea440c7_b259a5d744;linux-libc-headers - 5.14

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CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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