SB20261022415 - Integer overflow in Linux kernel core

Description

This security bulletin contains information about 1 vulnerability.

1) Integer overflow (CVE-ID: CVE-2026-98801)

CWE-ID: CWE-190 - Integer overflow

CVSSv4: 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]

The vulnerability allows a local user to corrupt socket memory reservation accounting and potentially cause a denial of service.

The vulnerability exists due to integer overflow in the Linux kernel's sk_setsockopt() handling of SO_RESERVE_MEM when processing reservation values near INT_MAX. A local user can supply an excessively large reservation value to overflow signed 32-bit arithmetic in sk_mem_pages(delta) and (pages << PAGE_SHIFT), corrupting sk_forward_alloc and sk_reserved_mem and potentially disrupting memory management and system availability.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/37e02c42a00be692c06343e11779aadc45f45971
• https://git.kernel.org/stable/c/492e04f9a00f3cc88a1f6899417b10f3019a624e
• https://git.kernel.org/stable/c/5069ce898148bd799395c5a464e006cbb840f188
• https://git.kernel.org/stable/c/a467b05b201b5c26be52ed3081992fa9c0387648