In the Linux kernel, the following vulnerability has been resolved:
zsmalloc: fix races between asynchronous zspage free and page migration
The asynchronous zspage free worker tries to lock a zspage's entire page list without defending against page migration. Since pages which haven't yet been locked can concurrently migrate off the zspage page list while lock_zspage() churns away, lock_zspage() can suffer from a few different lethal races.
It can lock a page which no longer belongs to the zspage and unsafely dereference page_private(), it can unsafely dereference a torn pointer to the next page (since there's a data race), and it can observe a spurious NULL pointer to the next page and thus not lock all of the zspage's pages (since a single page migration will reconstruct the entire page list, and create_page_chain() unconditionally zeroes out each list pointer in the process).
Fix the races by using migrate_read_lock() in lock_zspage() to synchronize with page migration.
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 kernel-livepatch-4.14.285-215.501Upgrade kernel-toolsUpgrade kernelUpgrade bpftoolUpgrade kernel-livepatch-5.15.50-23.125Upgrade kernel-tools-develUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-debuginfoUpgrade python-perfUpgrade kernel-develUpgrade kernel-livepatch-5.10.126-117.518Upgrade bpftool-debuginfoUpgrade kernel-tools-debuginfoUpgrade perf-debuginfoUpgrade kernel-headersUpgrade perfUpgrade python-perf-debuginfoUpgrade kernel-debuginfo-common-aarch64 | May 21, 2025 | Feb 26, 2025 |
| Debian | — | Upgrade linux | Feb 27, 2025 | Feb 27, 2025 |
| Huawei Euleros 2_0_sp12 | — | Upgrade kernel-toolsUpgrade kernel-abi-stablelistsUpgrade kernelUpgrade kernel-tools-libsUpgrade python3-perfUpgrade bpftool | Jun 11, 2025 | Feb 26, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade bpftoolUpgrade kernel-tools-libsUpgrade kernel-abi-stablelistsUpgrade kernelUpgrade python3-perfUpgrade kernel-tools | Jun 11, 2025 | Feb 26, 2025 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Feb 26, 2025 |
| Ubuntu | — | Upgrade linux-nvidiaUpgrade linux-gkeopUpgrade linux-kvmUpgrade linux-azure-5.4Upgrade linuxUpgrade linux-hwe-5.4Upgrade linux-hweUpgrade linux-aws-fipsUpgrade linux-gcp-5.4Upgrade linux-gcpUpgrade linux-oracleUpgrade linux-ibmUpgrade linux-gcp-4.15Upgrade linux-azure-5.15Upgrade linux-ibm-5.4Upgrade linux-azure-fipsUpgrade linux-iotUpgrade linux-oracle-5.15Upgrade linux-azure-4.15Upgrade linux-riscv-5.15Upgrade linux-gcp-fipsUpgrade linux-intel-iotg-5.15Upgrade linux-gkeUpgrade linux-bluefieldUpgrade linux-lowlatency-hwe-5.15Upgrade linux-oracle-5.4Upgrade linux-raspiUpgrade linux-azureUpgrade linux-aws-5.4Upgrade linux-fipsUpgrade linux-intel-iotgUpgrade linux-aws-5.15Upgrade linux-lowlatencyUpgrade linux-awsUpgrade linux-aws-hweUpgrade linux-hwe-5.15Upgrade linux-realtimeUpgrade linux-gcp-5.15Upgrade linux-raspi-5.4 | Mar 3, 2025 | Feb 26, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Feb 26, 2025 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub