In the Linux kernel, the following vulnerability has been resolved:
fs/xattr: missing fdput() in fremovexattr error path
In the Linux kernel, the fremovexattr() syscall calls fdget() to acquire a file reference but returns early without calling fdput() when strncpy_from_user() fails on the name argument. In multi-threaded processes where fdget() takes the slow path, this permanently leaks one file reference per call, pinning the struct file and associated kernel objects in memory. An unprivileged local user can exploit this to cause kernel memory exhaustion. The issue was inadvertently fixed by commit a71874379ec8 ("xattr: switch to CLASS(fd)").
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade kernel6.12-develUpgrade perf6.12-debuginfoUpgrade kernel6.12-tools-develUpgrade kernel6.12-debuginfo-common-x86_64Upgrade kernel6.12-modules-extra-commonUpgrade kernel6.12-toolsUpgrade kernel6.12Upgrade kernel6.12-debuginfoUpgrade kernel6.12-libbpf-debuginfoUpgrade kernel6.12-headersUpgrade python3-perf6.12Upgrade kernel6.12-libbpf-staticUpgrade perf6.12Upgrade kernel6.12-libbpf-develUpgrade kernel6.12-libbpfUpgrade kernel6.12-modules-extraUpgrade bpftool6.12Upgrade bpftool6.12-debuginfoUpgrade kernel6.12-debuginfo-common-aarch64Upgrade python3-perf6.12-debuginfoUpgrade kernel6.12-tools-debuginfoUpgrade kernel-livepatch-6.12.77-99.140 | Apr 9, 2026 | Mar 9, 2026 |
| Debian | — | Upgrade linux | Jul 27, 2026 | Jul 27, 2026 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Mar 9, 2026 |
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