In the Linux kernel, the following vulnerability has been resolved:
sched: Fix out-of-bound access in uclamp
Util-clamp places tasks in different buckets based on their clamp values for performance reasons. However, the size of buckets is currently computed using a rounding division, which can lead to an off-by-one error in some configurations.
For instance, with 20 buckets, the bucket size will be 1024/20=51. A task with a clamp of 1024 will be mapped to bucket id 1024/51=20. Sadly, correct indexes are in range [0,19], hence leading to an out of bound memory access.
Clamp the bucket id to fix the issue.
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade perf-debuginfoUpgrade python-perf-debuginfoUpgrade kernel-debuginfoUpgrade kernel-develUpgrade perfUpgrade kernel-tools-debuginfoUpgrade kernel-headersUpgrade bpftool-debuginfoUpgrade python-perfUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-toolsUpgrade kernelUpgrade kernel-tools-develUpgrade kernel-debuginfo-common-x86_64Upgrade bpftool | Apr 26, 2024 | Feb 28, 2024 |
| Debian | — | Upgrade linux | Jul 30, 2024 | Feb 28, 2024 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Feb 28, 2024 |
| Ubuntu | — | Upgrade linux-raspiUpgrade linux-fipsUpgrade linux-gcpUpgrade linux-aws-5.4Upgrade linux-kvmUpgrade linux-gkeopUpgrade linux-oracleUpgrade linux-azure-fipsUpgrade linux-oracle-5.4Upgrade linux-azure-5.4Upgrade linux-awsUpgrade linux-gcp-5.4Upgrade linux-bluefieldUpgrade linuxUpgrade linux-aws-fipsUpgrade linux-raspi-5.4Upgrade linux-gcp-fipsUpgrade linux-hwe-5.4Upgrade linux-azure | Nov 19, 2024 | Feb 28, 2024 |
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