Use-after-free in Linux kernel - CVE-2026-98524

Vulnerability identifier: #VU156826

CSH Severity: Low

CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-98524

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to escalate privileges on the affected system.

The vulnerability exists due to use-after-free in the Linux kernel RDS InfiniBand memory-region handling code when a failed mapping or registration leaves a freed scatterlist referenced by a pooled memory region. A local user can trigger this failure condition and subsequent memory-region teardown to access freed memory, potentially escalating privileges.

Linux kernel
Ubuntu
linux-nvidia-tegra (Ubuntu package)
linux-nvidia-tegra-igx (Ubuntu package)
linux-nvidia-tegra-5.15 (Ubuntu package)
linux (Ubuntu package)
linux-gcp (Ubuntu package)
linux-oracle (Ubuntu package)
linux-aws (Ubuntu package)
linux-ibm (Ubuntu package)
linux-hwe-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux-nvidia-tegra (Ubuntu package) - update to 5.15.0-1070.72
linux-nvidia-tegra-igx (Ubuntu package) - update to 5.15.0-1059.59
linux-nvidia-tegra-5.15 (Ubuntu package) - update to 5.15.0-1070.72~20.04.1
linux (Ubuntu package) - update to 7.0.0-42.42
linux-gcp (Ubuntu package) - update to 7.0.0-1016.18
linux-oracle (Ubuntu package) - update to 7.0.0-1015.16
linux-aws (Ubuntu package) - update to 7.0.0-1016.17
linux-ibm (Ubuntu package) - update to 7.0.0-1017.17
linux-hwe-7.0 (Ubuntu package) - update to 7.0.0-42.42~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1017.17

• https://git.kernel.org/stable/c/1be3211e6ac77adbb1eac01314d989d243b32c59
• https://git.kernel.org/stable/c/4468df5bcdef959fd96494e9968f323561a45f4c
• https://git.kernel.org/stable/c/49ba5ed0129906e0362c2e4b5e21c89b2a41e115
• https://git.kernel.org/stable/c/58eb1b3325edac42dc6df72c80962bd53a3c8ca7
• https://git.kernel.org/stable/c/8dca3c81344532a7f05edb3d12f31f3009410a90
• https://git.kernel.org/stable/c/b36d32f30c3f1e58e3a5ae79d0f52836a316b36e
• https://git.kernel.org/stable/c/c42d316163f89cd23de2f3e24558177a8c29bad8
• https://git.kernel.org/stable/c/e2ee0616260080376123997488b5cf8a3870b8d9

• Use-after-free in Linux kernel rds
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more
• Ubuntu update for linux-nvidia-tegra, linux-nvidia-tegra-5.15, linux-nvidia-tegra-igx
• Ubuntu update for linux, linux-aws, linux-aws-5.15 and more