Medium · 5.5 CVE-2024-50270 EUVD-2024-44772GHSA-vm8m-g3fg-cr9m

mm/damon/core: avoid overflow in damon_feed_loop_next_input()

Published Nov 19, 2024 · Updated May 11, 2026 · Assigned by Linux

Vendor: Linux Product: Linux Package: linux Package: linux Package: linux-allwinner-5.19 Package: linux-aws Package: linux-aws-5.0 Package: linux-aws-5.11 Package: linux-aws-5.13 Package: linux-aws-5.19 Package: linux-aws-5.3 Package: linux-aws-5.8 Package: linux-aws-6.2 Package: linux-aws-6.5 Package: linux-aws-6.8 Package: linux-azure Package: linux-azure-5.11 Package: linux-azure-5.13 Package: linux-azure-5.19 Package: linux-azure-5.3 Package: linux-azure-5.8 Package: linux-azure-6.11 Package: linux-azure-6.2 Package: linux-azure-6.5 Package: linux-azure-6.8 Package: linux-azure-edge Package: linux-azure-fde Package: linux-azure-fde-5.19 Package: linux-azure-fde-6.2 Package: linux-azure-nvidia Package: linux-fips Package: linux-gcp Package: linux-gcp-5.11 Package: linux-gcp-5.13 Package: linux-gcp-5.19 Package: linux-gcp-5.3 Package: linux-gcp-5.8 Package: linux-gcp-6.11 Package: linux-gcp-6.2 Package: linux-gcp-6.5 Package: linux-gcp-6.8 Package: linux-gke Package: linux-gke-4.15 Package: linux-gke-5.15 Package: linux-gke-5.4 Package: linux-gkeop Package: linux-gkeop-5.15 Package: linux-gkeop-5.4 Package: linux-hwe Package: linux-hwe-5.11 Package: linux-hwe-5.13 Package: linux-hwe-5.19 Package: linux-hwe-5.8 Package: linux-hwe-6.2 Package: linux-hwe-6.5 Package: linux-hwe-6.8 Package: linux-hwe-edge Package: linux-ibm Package: linux-ibm-6.8 Package: linux-intel-5.13 Package: linux-intel-iot-realtime Package: linux-lowlatency Package: linux-lowlatency-hwe-5.19 Package: linux-lowlatency-hwe-6.2 Package: linux-lowlatency-hwe-6.5 Package: linux-lowlatency-hwe-6.8 Package: linux-nvidia Package: linux-nvidia-6.11 Package: linux-nvidia-6.2 Package: linux-nvidia-6.5 Package: linux-nvidia-6.8 Package: linux-nvidia-lowlatency Package: linux-nvidia-tegra Package: linux-oem Package: linux-oem-5.10 Package: linux-oem-5.13 Package: linux-oem-5.14 Package: linux-oem-5.17 Package: linux-oem-5.6 Package: linux-oem-6.0 Package: linux-oem-6.1 Package: linux-oem-6.11 Package: linux-oem-6.5 Package: linux-oem-6.8 Package: linux-oracle Package: linux-oracle-5.0 Package: linux-oracle-5.11 Package: linux-oracle-5.13 Package: linux-oracle-5.3 Package: linux-oracle-5.8 Package: linux-oracle-6.5 Package: linux-oracle-6.8 Package: linux-raspi Package: linux-raspi-realtime Package: linux-raspi2 Package: linux-realtime Package: linux-realtime-6.8 Package: linux-riscv Package: linux-riscv-5.11 Package: linux-riscv-5.19 Package: linux-riscv-5.8 Package: linux-riscv-6.5 Package: linux-riscv-6.8 Package: linux-starfive-5.19 Package: linux-starfive-6.2 Package: linux-starfive-6.5 Package: linux-xilinx Platform: Linux Ecosystem: Debian Ecosystem: Ubuntu

Description

In the Linux kernel, the following vulnerability has been resolved:

mm/damon/core: avoid overflow in damon_feed_loop_next_input()

damon_feed_loop_next_input() is inefficient and fragile to overflows.
Specifically, 'score_goal_diff_bp' calculation can overflow when 'score'
is high. The calculation is actually unnecessary at all because 'goal' is
a constant of value 10,000. Calculation of 'compensation' is again
fragile to overflow. Final calculation of return value for under-achiving
case is again fragile to overflow when the current score is
under-achieving the target.

Add two corner cases handling at the beginning of the function to make the
body easier to read, and rewrite the body of the function to avoid
overflows and the unnecessary bp value calcuation.

Affected products

Vendor	Product	Affected	Fixed
Linux	Linux	6.8	6.11.8

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

Debian

Security tracker ↗

Release	Package	Fixed in	Advisory
Debian 14	linux	6.11.9-1	—
Debian 13	linux	6.11.9-1	—

Ubuntu

Security tracker ↗

Release	Package	Fixed in	Advisory
Ubuntu 24.04 LTS	linux	6.8.0-58.60	USN-7449-1
Ubuntu 24.04 LTS	linux-aws	6.8.0-1027.29	USN-7449-1
Ubuntu 24.04 LTS	linux-azure	6.8.0-1027.32	USN-7449-1
Ubuntu 24.04 LTS	linux-azure-6.11	6.11.0-1012.12~24.04.1	—
Ubuntu 24.04 LTS	linux-azure-nvidia	6.8.0-1014.15	USN-7468-1
Ubuntu 24.04 LTS	linux-gcp	6.8.0-1028.30	USN-7450-1
Ubuntu 24.04 LTS	linux-gcp-6.11	6.11.0-1011.11~24.04.1	—
Ubuntu 24.04 LTS	linux-gke	6.8.0-1023.27	USN-7450-1
Ubuntu 24.04 LTS	linux-gkeop	6.8.0-1010.12	USN-7450-1
Ubuntu 24.04 LTS	linux-ibm	6.8.0-1024.24	USN-7449-1
Ubuntu 24.04 LTS	linux-nvidia	6.8.0-1026.29	USN-7449-1
Ubuntu 24.04 LTS	linux-nvidia-6.11	6.11.0-1007.7	—
Ubuntu 24.04 LTS	linux-nvidia-lowlatency	6.8.0-1026.29.1	USN-7449-1
Ubuntu 24.04 LTS	linux-nvidia-tegra	6.8.0-1008.8	—
Ubuntu 24.04 LTS	linux-oem-6.11	6.11.0-1015.15	USN-7310-1
Ubuntu 24.04 LTS	linux-oem-6.8	6.8.0-1026.26	USN-7449-1
Ubuntu 24.04 LTS	linux-oracle	6.8.0-1024.25	USN-7449-1
Ubuntu 24.04 LTS	linux-raspi	6.8.0-1028.32	USN-7524-1
Ubuntu 24.04 LTS	linux-realtime +1	No fix yet	—
Ubuntu 24.04 LTS	linux-riscv +1	6.8.0-58.60.1	USN-7449-1
Ubuntu 24.04 LTS	linux-xilinx	6.8.0-1017.18	—
Ubuntu 22.04 LTS	linux-aws-6.8	6.8.0-1027.29~22.04.1	USN-7451-1
Ubuntu 22.04 LTS	linux-azure-6.8	6.8.0-1027.32~22.04.1	USN-7449-1
Ubuntu 22.04 LTS	linux-gcp-6.8	6.8.0-1028.30~22.04.1	USN-7452-1
Ubuntu 22.04 LTS	linux-hwe-6.8	6.8.0-58.60~22.04.1	USN-7449-2
Ubuntu 22.04 LTS	linux-ibm-6.8	6.8.0-1024.24~22.04.1	—
Ubuntu 22.04 LTS	linux-nvidia-6.8	6.8.0-1026.29~22.04.1	USN-7449-1
Ubuntu 22.04 LTS	linux-oracle-6.8	6.8.0-1024.25~22.04.1	USN-7449-1
Ubuntu 22.04 LTS	linux-riscv +32	No fix yet	—
Ubuntu 22.04 LTS	linux-riscv-6.8 +1	6.8.0-58.60.1~22.04.1	USN-7449-1
Ubuntu 20.04 LTS	linux-gke +28	No fix yet	—
Ubuntu 18.04 LTS	linux-gcp +13	No fix yet	—
Ubuntu 16.04 LTS	linux-hwe-edge	No fix yet	—

Show 3 more (older releases, extended support, other products)

Release	Package	Fixed in	Advisory
Ubuntu Pro Realtime 24.04 LTS	linux-raspi-realtime	6.8.0-2023.24	USN-7523-1
Ubuntu Pro Realtime 24.04 LTS	linux-realtime	6.8.1-1020.21	USN-7453-1
Ubuntu Pro Realtime 22.04 LTS	linux-realtime-6.8	6.8.1-1020.21~22.04.1	—
Ubuntu Pro FIPS-updates 24.04 LTS	linux-fips	6.8.0-78.78+fips1	—

Advisories 11

USN-7449-1 linux, linux-aws, linux-azure, linux-azure-6.8, linux-ibm, linux-lowlatency, linux-lowlatency-hwe-6.8, linux-nvidia, linux-nvidia-6.8, linux-nvidia-lowlatency, linux-oem-6.8, linux-oracle, linux-oracle-6.8 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
USN-7450-1 linux-gcp, linux-gke, linux-gkeop vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
USN-7468-1 linux-azure-nvidia vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
USN-7453-1 linux-realtime vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
USN-7451-1 linux-aws-6.8 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
USN-7524-1 linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
USN-7523-1 linux-raspi-realtime vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
USN-7310-1 linux-oem-6.11 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
USN-7449-2 linux-hwe-6.8 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
USN-7452-1 linux-gcp-6.8 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
WID-SEC-2024-3497 Linux Kernel: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 13, 2026

References