In the Linux kernel, the following vulnerability has been resolved:
bpf: fix a memory leak in the LRU and LRU_PERCPU hash maps
The LRU and LRU_PERCPU maps allocate a new element on update before locking the target hash table bucket. Right after that the maps try to lock the bucket. If this fails, then maps return -EBUSY to the caller without releasing the allocated element. This makes the element untracked: it doesn't belong to either of free lists, and it doesn't belong to the hash table, so can't be re-used; this eventually leads to the permanent -ENOMEM on LRU map updates, which is unexpected. Fix this by returning the element to the local free list if bucket locking fails.
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade bpftoolUpgrade python-perfUpgrade bpftool-debuginfoUpgrade kernelUpgrade kernel-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-toolsUpgrade kernel-tools-debuginfoUpgrade perf-debuginfoUpgrade kernel-livepatch-5.15.117-72.142Upgrade kernel-tools-develUpgrade kernel-headersUpgrade kernel-debuginfo-common-aarch64Upgrade python-perf-debuginfoUpgrade perfUpgrade kernel-devel | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade perfUpgrade kernel-livepatch-6.1.34-56.100Upgrade kernel-libbpfUpgrade kernel-debuginfoUpgrade bpftool-debuginfoUpgrade perf-debuginfoUpgrade kernel-headersUpgrade kernel-tools-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-toolsUpgrade kernel-tools-develUpgrade kernelUpgrade kernel-develUpgrade python3-perf-debuginfoUpgrade bpftoolUpgrade kernel-libbpf-develUpgrade python3-perfUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-libbpf-static | Feb 20, 2026 | Dec 24, 2025 |
| Debian | — | Upgrade linux | Dec 29, 2025 | Dec 29, 2025 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Dec 24, 2025 |
| Ubuntu | — | Upgrade linux-intel-iot-realtimeUpgrade linux-lowlatency-hwe-5.15Upgrade linux-realtimeUpgrade linux-awsUpgrade linux-nvidia-tegra-5.15Upgrade linux-azureUpgrade linux-hwe-5.15Upgrade linux-bluefieldUpgrade linuxUpgrade linux-nvidia-tegra-igxUpgrade linux-gcpUpgrade linux-kvmUpgrade linux-gkeUpgrade linux-xilinx-zynqmpUpgrade linux-lowlatencyUpgrade linux-ibmUpgrade linux-riscv-5.15Upgrade linux-azure-5.15Upgrade linux-nvidia-tegraUpgrade linux-oracle-5.15Upgrade linux-gcp-5.15Upgrade linux-raspiUpgrade linux-oracleUpgrade linux-intel-iotg-5.15Upgrade linux-intel-iotgUpgrade linux-ibm-5.15Upgrade linux-nvidiaUpgrade linux-aws-5.15Upgrade linux-gkeop | Jan 6, 2026 | Dec 24, 2025 |
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