In the Linux kernel, the following vulnerability has been resolved:
ext4: fix invalid free tracking in ext4_xattr_move_to_block()
In ext4_xattr_move_to_block(), the value of the extended attribute which we need to move to an external block may be allocated by kvmalloc() if the value is stored in an external inode. So at the end of the function the code tried to check if this was the case by testing entry->e_value_inum.
However, at this point, the pointer to the xattr entry is no longer valid, because it was removed from the original location where it had been stored. So we could end up calling kvfree() on a pointer which was not allocated by kvmalloc(); or we could also potentially leak memory by not freeing the buffer when it should be freed. Fix this by storing whether it should be freed in a separate variable.
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 kernel-develUpgrade kernel-livepatch-4.14.318-240.529Upgrade perfUpgrade python-perf-debuginfoUpgrade kernel-tools-develUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-headersUpgrade kernel-toolsUpgrade kernel-livepatch-5.15.117-72.142Upgrade bpftool-debuginfoUpgrade kernel-livepatch-5.10.184-174.730Upgrade kernelUpgrade kernel-debuginfoUpgrade kernel-tools-debuginfoUpgrade python-perfUpgrade bpftoolUpgrade kernel-debuginfo-common-x86_64 | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade kernel-tools-develUpgrade perf-debuginfoUpgrade kernel-debuginfoUpgrade kernel-libbpfUpgrade perfUpgrade python3-perfUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-headersUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-develUpgrade python3-perf-debuginfoUpgrade kernel-libbpf-develUpgrade bpftool-debuginfoUpgrade kernel-toolsUpgrade kernel-tools-debuginfoUpgrade kernelUpgrade bpftoolUpgrade kernel-livepatch-6.1.29-47.49Upgrade kernel-libbpf-static | Feb 20, 2026 | Dec 24, 2025 |
| Debian | — | Upgrade linux | Dec 29, 2025 | Dec 29, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernelUpgrade python3-perfUpgrade bpftoolUpgrade kernel-abi-stablelistsUpgrade kernel-toolsUpgrade kernel-tools-libs | Mar 10, 2026 | Mar 10, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Dec 24, 2025 |
| Ubuntu | — | Upgrade linuxUpgrade linux-aws-fipsUpgrade linux-intel-iot-realtimeUpgrade linux-nvidia-tegraUpgrade linux-hwe-5.4Upgrade linux-bluefieldUpgrade linux-gcp-fipsUpgrade linux-oracle-5.4Upgrade linux-gcp-5.4Upgrade linux-riscv-5.15Upgrade linux-nvidia-tegra-5.15Upgrade linux-gkeopUpgrade linux-fipsUpgrade linux-gcpUpgrade linux-ibm-5.15Upgrade linux-xilinx-zynqmpUpgrade linux-gkeUpgrade linux-ibm-5.4Upgrade linux-intel-iotgUpgrade linux-nvidiaUpgrade linux-nvidia-tegra-igxUpgrade linux-raspi-5.4Upgrade linux-ibmUpgrade linux-gcp-5.15Upgrade linux-hwe-5.15Upgrade linux-intel-iotg-5.15Upgrade linux-lowlatency-hwe-5.15Upgrade linux-lowlatencyUpgrade linux-azure-fipsUpgrade linux-awsUpgrade linux-kvmUpgrade linux-azure-5.15Upgrade linux-azure-5.4Upgrade linux-aws-5.15Upgrade linux-realtimeUpgrade linux-iotUpgrade linux-azure-fdeUpgrade linux-oracleUpgrade linux-oracle-5.15Upgrade linux-azureUpgrade linux-raspiUpgrade linux-aws-5.4 | Jan 6, 2026 | Dec 24, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Dec 24, 2025 |
Prioritize 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