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However, at this point, the pointer to the xattr entry is no longer valid, because it was removed from the original location where it had been stored.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 kernelUpgrade kernel-tools-debuginfoUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-debuginfoUpgrade python-perfUpgrade kernel-livepatch-5.10.184-174.730Upgrade bpftool-debuginfoUpgrade bpftoolUpgrade perfUpgrade kernel-livepatch-4.14.318-240.529Upgrade kernel-tools-develUpgrade kernel-headersUpgrade python-perf-debuginfoUpgrade kernel-livepatch-5.15.117-72.142Upgrade kernel-debuginfo-common-aarch64Upgrade perf-debuginfoUpgrade kernel-toolsUpgrade kernel-devel | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade python3-perfUpgrade kernel-tools-develUpgrade kernel-libbpfUpgrade kernel-debuginfoUpgrade kernel-headersUpgrade perfUpgrade kernel-debuginfo-common-aarch64Upgrade perf-debuginfoUpgrade bpftoolUpgrade kernel-develUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-toolsUpgrade kernel-libbpf-staticUpgrade kernel-libbpf-develUpgrade python3-perf-debuginfoUpgrade bpftool-debuginfoUpgrade kernelUpgrade kernel-livepatch-6.1.29-47.49Upgrade kernel-tools-debuginfo | Feb 20, 2026 | Dec 24, 2025 |
| Debian | — | Upgrade linux | Dec 29, 2025 | Dec 29, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernelUpgrade bpftoolUpgrade python3-perfUpgrade kernel-tools-libsUpgrade kernel-abi-stablelistsUpgrade kernel-tools | Mar 10, 2026 | Mar 10, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Dec 24, 2025 |
| Ubuntu | — | Upgrade linux-ibmUpgrade linux-awsUpgrade linux-iotUpgrade linux-oracle-5.15Upgrade linux-azure-fipsUpgrade linux-azureUpgrade linux-lowlatencyUpgrade linux-realtimeUpgrade linux-raspiUpgrade linux-oracleUpgrade linux-gcp-5.15Upgrade linux-azure-5.4Upgrade linux-azure-5.15Upgrade linux-kvmUpgrade linux-intel-iotg-5.15Upgrade linux-aws-5.15Upgrade linux-aws-5.4Upgrade linux-hwe-5.15Upgrade linux-lowlatency-hwe-5.15Upgrade linux-nvidia-tegra-igxUpgrade linux-ibm-5.15Upgrade linux-gcp-5.4Upgrade linux-aws-fipsUpgrade linux-intel-iot-realtimeUpgrade linux-nvidia-tegraUpgrade linux-gcp-fipsUpgrade linux-fipsUpgrade linux-gkeUpgrade linux-riscv-5.15Upgrade linuxUpgrade linux-intel-iotgUpgrade linux-gcpUpgrade linux-xilinx-zynqmpUpgrade linux-raspi-5.4Upgrade linux-nvidia-tegra-5.15Upgrade linux-gkeopUpgrade linux-bluefieldUpgrade linux-oracle-5.4Upgrade linux-ibm-5.4Upgrade linux-hwe-5.4Upgrade linux-nvidia | 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 |
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