In the Linux kernel, the following vulnerability has been resolved:
btrfs: fix extent map use-after-free when handling missing device in read_one_chunk
Store the error code before freeing the extent_map. Though it's reference counted structure, in that function it's the first and last allocation so this would lead to a potential use-after-free.
The error can happen eg. when chunk is stored on a missing device and the degraded mount option is missing.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=216721
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-develUpgrade kernel-tools-debuginfoUpgrade kernel-toolsUpgrade perfUpgrade kernel-debuginfo-common-aarch64Upgrade bpftool-debuginfoUpgrade python-perfUpgrade perf-debuginfoUpgrade bpftoolUpgrade python-perf-debuginfoUpgrade kernel-tools-develUpgrade kernelUpgrade kernel-livepatch-5.15.90-54.138Upgrade kernel-debuginfo-common-x86_64Upgrade kernel-headersUpgrade kernel-debuginfo | May 20, 2026 | May 20, 2026 |
| Debian | — | Upgrade linux | Dec 23, 2025 | Dec 23, 2025 |
| Ubuntu | — | Upgrade linux-intel-iot-realtimeUpgrade linuxUpgrade linux-aws-5.15Upgrade linux-azureUpgrade linux-hwe-5.15Upgrade linux-lowlatency-hwe-5.15Upgrade linux-realtimeUpgrade linux-awsUpgrade linux-gcpUpgrade linux-bluefieldUpgrade linux-nvidia-tegra-5.15Upgrade linux-intel-iotg-5.15Upgrade linux-lowlatencyUpgrade linux-nvidiaUpgrade linux-kvmUpgrade linux-riscv-5.15Upgrade linux-gkeopUpgrade linux-azure-5.15Upgrade linux-gcp-5.15Upgrade linux-raspiUpgrade linux-oracleUpgrade linux-intel-iotgUpgrade linux-oracle-5.15Upgrade linux-gkeUpgrade linux-ibm | Sep 19, 2025 | Sep 16, 2025 |
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