CVE-2023-32248: Linux Kernel ksmbd Tree Connection NULL Pointer Dereference Denial-of-Service Vulnerability
First published: Wed Jul 05 2023(Updated: )
A flaw was found in the Linux kernel's ksmbd, a high-performance in-kernel SMB server. The specific flaw exists within the handling of SMB2_TREE_CONNECT and SMB2_QUERY_INFO commands. The issue results from the lack of proper validation of a pointer prior to accessing it. An attacker can leverage this vulnerability to create a denial-of-service condition on the system.
Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <6.4 | 6.4 |
| Linux Kernel | >=5.15<5.15.111 | |
| Linux Kernel | >=5.16<6.1.28 | |
| Linux Kernel | >=6.2<6.2.15 | |
| Linux Kernel | >=6.3<6.3.2 | |
| netapp h300s | ||
| netapp h410c | ||
| netapp h410s | ||
| netapp h500s | ||
| netapp h700s | ||
| Linux Kernel | <=6.3.9 | |
| Linux kernel | ||
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.15-1 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://access.redhat.com/security/cve/CVE-2023-32248
- https://www.zerodayinitiative.com/advisories/ZDI-CAN-20479/
- https://bugzilla.redhat.com/show_bug.cgi?id=2219818
- https://security.netapp.com/advisory/ntap-20230915-0006/
- https://launchpad.net/bugs/cve/CVE-2023-32248
- https://github.com/torvalds/linux/commit/3ac00a2ab69b34189942afa9e862d5170cdcb018
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-32248
- https://nvd.nist.gov/vuln/detail/CVE-2023-32248
- https://security-tracker.debian.org/tracker/CVE-2023-32248
- https://ubuntu.com/security/CVE-2023-32248
- https://git.kernel.org/linus/3ac00a2ab69b34189942afa9e862d5170cdcb018
Frequently Asked Questions
What is the severity of CVE-2023-32248?
CVE-2023-32248 has a medium severity rating due to its exploitation potential affecting the Linux kernel's ksmbd.
How do I fix CVE-2023-32248?
To mitigate CVE-2023-32248, update your Linux kernel to version 6.4 or later, or to the fixed versions if using the Debian Linux package.
Which Linux kernel versions are affected by CVE-2023-32248?
CVE-2023-32248 affects Linux kernel versions from 5.15 up to 6.3.9 but is resolved in version 6.4 and subsequent releases.
What components are affected by CVE-2023-32248?
CVE-2023-32248 specifically impacts the ksmbd component in the Linux kernel, which functions as an in-kernel SMB server.
Is CVE-2023-32248 remotely exploitable?
Yes, CVE-2023-32248 can be exploited remotely due to improper validation of pointers within SMB commands.
- collector/nvd-latest
- agent/type
- collector/launchpad-cve
- source/Launchpad
- agent/first-publish-date
- agent/author
- agent/title
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2023-32248
- agent/software-canonical-lookup
- collector/mitre-cve
- source/MITRE
- agent/severity
- collector/usn-cve
- source/Ubuntu
- agent/description
- agent/trending
- agent/remedy
- agent/references
- agent/last-modified-date
- agent/source
- collector/nvd-cve
- source/NVD
- agent/software-canonical-lookup-request
- collector/nvd-index
- collector/nvd-api
- agent/weakness
- agent/tags
- collector/zdi-advisory
- source/ZDI
- alias/ZDI-23-696
- alias/ZDI-CAN-20479
- agent/softwarecombine
- agent/event
- collector/security-tracker-debian
- source/Debian
- package-manager/redhat
- vendor/linux
- canonical/linux kernel
- version/linux kernel/5.15
- version/linux kernel/5.16
- version/linux kernel/6.2
- version/linux kernel/6.3
- vendor/netapp
- canonical/netapp h300s
- canonical/netapp h410c
- canonical/netapp h410s
- canonical/netapp h500s
- canonical/netapp h700s
- version/linux kernel/6.3.9
- package-manager/debian