SB20260816195 - Out-of-bounds read in Linux kernel riscv mm
Published: August 16, 2026
Security Bulletin ID
SB20260816195
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Out-of-bounds read (CVE-ID: CVE-2026-74524)
CWE-ID: CWE-125 - Out-of-bounds read
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 cause a denial of service.
The vulnerability exists due to an out-of-bounds page-table walk in remove_pud_mapping() and remove_p4d_mapping() when handling memory hot-remove on folded RISC-V page-table levels. A local user can trigger memory hot-remove operations to cause a denial of service.
On Sv48, the P4D level is folded, and on Sv39, both P4D and PUD levels are folded.
Remediation
Install update from vendor's website.