Threats Tagged 'cve-2025-39927'

The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: net_sched: hfsc: Fix a potential UAF in hfsc_dequeue() too (CVE-2025-37823) * kernel: i40e: fix MMIO write access to an invalid page in i40e_clear_hw (CVE-2025-38200) * kernel: drm/gem: Acquire references on GEM handles for framebuffers (CVE-2025-38449) * kernel: netfilter: nf_conntrack: fix crash due to removal of uninitialised entry (CVE-2025-38472) * kernel: xfrm: interface: fix use-after-free after changing collect_md xfrm interface (CVE-2025-38500) * kernel: smb: client: fix use-after-free in cifs_oplock_break (CVE-2025-38527) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

In the Linux kernel, the following vulnerability has been resolved: ceph: fix race condition validating r_parent before applying state Add validation to ensure the cached parent directory inode matches the directory info in MDS replies. This prevents client-side race conditions where concurrent operations (e.g. rename) cause r_parent to become stale between request initiation and reply processing, which could lead to applying state changes to incorrect directory inodes. [ idryomov: folded a kerneldoc fixup and a follow-up fix from Alex to move CEPH_CAP_PIN reference when r_parent is updated: When the parent directory lock is not held, req->r_parent can become stale and is updated to point to the correct inode. However, the associated CEPH_CAP_PIN reference was not being adjusted. The CEPH_CAP_PIN is a reference on an inode that is tracked for accounting purposes. Moving this pin is important to keep the accounting balanced. When the pin was not moved from the old parent to the new one, it created two problems: The reference on the old, stale parent was never released, causing a reference leak. A reference for the new parent was never acquired, creating the risk of a reference underflow later in ceph_mdsc_release_request(). This patch corrects the logic by releasing the pin from the old parent and acquiring it for the new parent when r_parent is switched. This ensures reference accounting stays balanced. ]