NULL pointer dereference in Linux kernel - CVE-2024-56646

Vulnerability identifier: #VU102116

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2024-56646

CWE-ID: CWE-476

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to NULL pointer dereference within the inet6_rtm_deladdr(), modify_prefix_route() and inet6_addr_modify() functions in net/ipv6/addrconf.c. A local user can perform a denial of service (DoS) attack.

Linux kernel
Ubuntu
linux-image-6.11.0-21-generic-64k (Ubuntu package)
linux-image-virtual-hwe-24.04 (Ubuntu package)
linux-image-virtual (Ubuntu package)
linux-image-6.11.0-21-generic (Ubuntu package)
linux-image-generic-64k (Ubuntu package)
linux-image-oem-24.04a (Ubuntu package)
linux-image-oem-24.04 (Ubuntu package)
linux-image-generic-64k-hwe-24.04 (Ubuntu package)
linux-image-generic (Ubuntu package)
linux-image-generic-hwe-24.04 (Ubuntu package)
linux-image-6.11.0-1007-realtime (Ubuntu package)
linux-image-realtime (Ubuntu package)
linux-image-realtime-hwe-24.04 (Ubuntu package)
linux-image-6.11.0-1010-raspi (Ubuntu package)
linux-image-raspi (Ubuntu package)
linux-image-gcp-64k (Ubuntu package)
linux-image-gcp (Ubuntu package)
linux-image-6.11.0-1011-gcp-64k (Ubuntu package)
linux-image-6.11.0-1011-gcp (Ubuntu package)
linux-image-aws (Ubuntu package)
linux-image-6.11.0-1011-aws (Ubuntu package)
linux-image-lowlatency-64k (Ubuntu package)
linux-image-lowlatency (Ubuntu package)
linux-image-6.11.0-1011-lowlatency (Ubuntu package)
linux-image-6.11.0-1011-lowlatency-64k (Ubuntu package)
linux-image-lowlatency-64k-hwe-24.04 (Ubuntu package)
linux-image-lowlatency-hwe-24.04 (Ubuntu package)
linux-image-azure (Ubuntu package)
linux-image-6.11.0-1012-azure (Ubuntu package)
linux-image-6.11.0-1012-azure-fde (Ubuntu package)
linux-image-azure-fde (Ubuntu package)
linux-image-oracle (Ubuntu package)
linux-image-oracle-64k (Ubuntu package)
linux-image-6.11.0-1013-oracle (Ubuntu package)
linux-image-6.11.0-1013-oracle-64k (Ubuntu package)
linux-image-6.11.0-1017-oem (Ubuntu package)
linux-image-oem-24.04b (Ubuntu package)

Install update from vendor's website.

Linux kernel - addressed in versions 6.12.5, 6.13
linux-image-6.11.0-21-generic-64k (Ubuntu package) - addressed in versions 6.11.0-21.21, 6.11.0-21.21~24.04.1+1
linux-image-virtual-hwe-24.04 (Ubuntu package) - addressed in versions 6.11.0-21.21, 6.11.0-21.21~24.04.1
linux-image-virtual (Ubuntu package) - update to 6.11.0-21.21
linux-image-6.11.0-21-generic (Ubuntu package) - addressed in versions 6.11.0-21.21, 6.11.0-21.21~24.04.1+1
linux-image-generic-64k (Ubuntu package) - update to 6.11.0-21.21
linux-image-oem-24.04a (Ubuntu package) - update to 6.11.0-21.21
linux-image-oem-24.04 (Ubuntu package) - update to 6.11.0-21.21
linux-image-generic-64k-hwe-24.04 (Ubuntu package) - addressed in versions 6.11.0-21.21, 6.11.0-21.21~24.04.1
linux-image-generic (Ubuntu package) - update to 6.11.0-21.21
linux-image-generic-hwe-24.04 (Ubuntu package) - addressed in versions 6.11.0-21.21, 6.11.0-21.21~24.04.1
linux-image-6.11.0-1007-realtime (Ubuntu package) - update to 6.11.0-1007.7
linux-image-realtime (Ubuntu package) - update to 6.11.0-1007.7
linux-image-realtime-hwe-24.04 (Ubuntu package) - update to 6.11.0-1007.7
linux-image-6.11.0-1010-raspi (Ubuntu package) - update to 6.11.0-1010.10
linux-image-raspi (Ubuntu package) - update to 6.11.0-1010.10
linux-image-gcp-64k (Ubuntu package) - update to 6.11.0-1011.11
linux-image-gcp (Ubuntu package) - update to 6.11.0-1011.11
linux-image-6.11.0-1011-gcp-64k (Ubuntu package) - update to 6.11.0-1011.11
linux-image-6.11.0-1011-gcp (Ubuntu package) - update to 6.11.0-1011.11
linux-image-aws (Ubuntu package) - update to 6.11.0-1011.12
linux-image-6.11.0-1011-aws (Ubuntu package) - update to 6.11.0-1011.12
linux-image-lowlatency-64k (Ubuntu package) - update to 6.11.0-1011.12
linux-image-lowlatency (Ubuntu package) - update to 6.11.0-1011.12
linux-image-6.11.0-1011-lowlatency (Ubuntu package) - update to 6.11.0-1011.12~24.04.1
linux-image-6.11.0-1011-lowlatency-64k (Ubuntu package) - update to 6.11.0-1011.12~24.04.1
linux-image-lowlatency-64k-hwe-24.04 (Ubuntu package) - update to 6.11.0-1011.12~24.04.1
linux-image-lowlatency-hwe-24.04 (Ubuntu package) - update to 6.11.0-1011.12~24.04.1
linux-image-azure (Ubuntu package) - update to 6.11.0-1012.12
linux-image-6.11.0-1012-azure (Ubuntu package) - update to 6.11.0-1012.12
linux-image-6.11.0-1012-azure-fde (Ubuntu package) - update to 6.11.0-1012.12
linux-image-azure-fde (Ubuntu package) - update to 6.11.0-1012.12
linux-image-oracle (Ubuntu package) - update to 6.11.0-1013.14
linux-image-oracle-64k (Ubuntu package) - update to 6.11.0-1013.14
linux-image-6.11.0-1013-oracle (Ubuntu package) - update to 6.11.0-1013.14
linux-image-6.11.0-1013-oracle-64k (Ubuntu package) - update to 6.11.0-1013.14
linux-image-6.11.0-1017-oem (Ubuntu package) - update to 6.11.0-1017.17
linux-image-oem-24.04b (Ubuntu package) - update to 6.11.0-1017.17

• https://git.kernel.org/stable/c/01f95357e47219a9c4b29e177b717edbfab721b4
• https://git.kernel.org/stable/c/a747e02430dfb3657141f99aa6b09331283fa493
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.5
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.13

• NULL pointer dereference in Linux kernel ipv6
• Ubuntu update for linux-oem-6.11
• Ubuntu update for linux-lowlatency-hwe-6.11
• Ubuntu update for linux-lowlatency
• Ubuntu update for linux
• Ubuntu update for linux-raspi