CVE-2025-21879

HighCVSS 7.8/10Last modified Jun 17, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

btrfs: fix use-after-free on inode when scanning root during em shrinking

At btrfs_scan_root() we are accessing the inode's root (and fs_info) in a call to btrfs_fs_closing() after we have scheduled the inode for a delayed iput, and that can result in a use-after-free on the inode in case the cleaner kthread does the iput before we dereference the inode in the call to btrfs_fs_closing().

Fix this by using the fs_info stored already in a local variable instead of doing inode->root->fs_info.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-416

Affected software

No affected versions have been published.

Timeline

Published
Mar 27, 2025
Last modified
Jun 17, 2026
NVD status
Modified

Related CVEs from 2025

CVE-2025-21889.1There is a whitelist mechanism bypass in GameCenter ,successful exploitation of this vulnerability may affect service confidentiality and inCVE-2025-218805.5In the Linux kernel, the following vulnerability has been resolved: drm/xe/userptr: fix EFAULT handling Currently we treat EFAULT from hmmCVE-2025-218815.5In the Linux kernel, the following vulnerability has been resolved: uprobes: Reject the shared zeropage in uprobe_write_opcode() We triggeCVE-2025-218825.5In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Fix vport QoS cleanup on error When enabling vport QoS failsCVE-2025-218837.8In the Linux kernel, the following vulnerability has been resolved: ice: Fix deinitializing VF in error path If ice_ena_vfs() fails after CVE-2025-218845.5In the Linux kernel, the following vulnerability has been resolved: net: better track kernel sockets lifetime While kernel sockets are disCVE-2025-218855.5In the Linux kernel, the following vulnerability has been resolved: RDMA/bnxt_re: Fix the page details for the srq created by kernel consumCVE-2025-218865.5In the Linux kernel, the following vulnerability has been resolved: RDMA/mlx5: Fix implicit ODP hang on parent deregistration Fix the destCVE-2025-218877.8In the Linux kernel, the following vulnerability has been resolved: ovl: fix UAF in ovl_dentry_update_reval by moving dput() in ovl_link_upCVE-2025-218885.5In the Linux kernel, the following vulnerability has been resolved: RDMA/mlx5: Fix a WARN during dereg_mr for DM type Memory regions (MR) CVE-2025-218895.5In the Linux kernel, the following vulnerability has been resolved: perf/core: Add RCU read lock protection to perf_iterate_ctx() The perfCVE-2025-21895.1This vulnerability exists in the Tinxy smart devices due to storage of credentials in plaintext within the device firmware. An attacker with
CVE-2025-21879: High severity, CVSS 7.8 | Vulnix