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In the Linux kernel, the following vulnerability has been resolved:
mm/huge_memory: fix NULL pointer deference when splitting folio
Commit c010d47f107f ("mm: thp: split huge page to any lower order pages") introduced an early check on the folio's order via mapping->flags before proceeding with the split work.
This check introduced a bug: for shmem folios in the swap cache and truncated folios, the mapping pointer can be NULL. Accessing mapping->flags in this state leads directly to a NULL pointer dereference.
This commit fixes the issue by moving the check for mapping != NULL before any attempt to access mapping->flags.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade bpftool6.12-debuginfoUpgrade bpftool6.12Upgrade kernel6.12-debuginfo-common-aarch64Upgrade kernel6.12-modules-extra-commonUpgrade kernel6.12-debuginfo-common-x86_64Upgrade kernel6.12-modules-extraUpgrade kernel6.12Upgrade kernel6.12-libbpf-develUpgrade perf6.12-debuginfoUpgrade kernel6.12-libbpf-debuginfoUpgrade kernel6.12-tools-debuginfoUpgrade kernel6.12-tools-develUpgrade kernel-livepatch-6.12.63-84.121Upgrade kernel6.12-toolsUpgrade python3-perf6.12Upgrade kernel6.12-libbpf-staticUpgrade kernel6.12-develUpgrade kernel6.12-debuginfoUpgrade kernel6.12-libbpfUpgrade perf6.12Upgrade python3-perf6.12-debuginfoUpgrade kernel6.12-headers | Feb 20, 2026 | Dec 16, 2025 |
| Debian | — | Upgrade linux | Jul 23, 2026 | Jul 23, 2026 |
| Oracle_linux | — | Upgrade kernel-uek | Feb 24, 2026 | Dec 16, 2025 |
| Ubuntu | — | Upgrade linux-image-aws-64k-6.17Upgrade linux-image-realtime-hwe-24.04Upgrade linux-image-6.17.0-1009-gcpUpgrade linux-image-generic-64k-hwe-24.04Upgrade linux-image-awsUpgrade linux-image-6.17.0-1010-azureUpgrade linux-image-oracle-6.17Upgrade linux-image-oracle-64k-6.17Upgrade linux-image-azureUpgrade linux-image-6.17.0-19-generic-64kUpgrade linux-image-genericUpgrade linux-image-raspiUpgrade linux-image-6.17.0-1009-awsUpgrade linux-image-6.17.0-1010-raspiUpgrade linux-image-gcp-64k-6.17Upgrade linux-image-gcp-64kUpgrade linux-image-generic-64k-6.17Upgrade linux-image-realtimeUpgrade linux-image-oem-24.04cUpgrade linux-image-oem-24.04dUpgrade linux-image-oem-24.04aUpgrade linux-image-generic-64kUpgrade linux-image-realtime-6.17Upgrade linux-image-oem-24.04bUpgrade linux-image-aws-6.17Upgrade linux-image-6.17.0-1009-oracle-64kUpgrade linux-image-6.17.0-1009-oracleUpgrade linux-image-oracle-64kUpgrade linux-image-generic-hwe-24.04Upgrade linux-image-oem-24.04Upgrade linux-image-6.17.0-1017-oemUpgrade linux-image-oracleUpgrade linux-image-gcpUpgrade linux-image-aws-64kUpgrade linux-image-6.17.0-1009-gcp-64kUpgrade linux-image-6.17.0-1008-realtimeUpgrade linux-image-generic-6.17Upgrade linux-image-azure-6.17Upgrade linux-image-raspi-6.17Upgrade linux-image-virtual-hwe-24.04Upgrade linux-image-virtualUpgrade linux-image-gcp-6.17Upgrade linux-image-6.17.0-19-genericUpgrade linux-image-virtual-6.17Upgrade linux-image-oem-6.17Upgrade linux-image-6.17.0-1009-aws-64k | Mar 17, 2026 | Dec 16, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jun 18, 2026 | Dec 16, 2025 |
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