Linux kernel 安全漏洞

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in the Linux kernel that stems from overlayfs not handling pure data directories correctly, which could cause the kernel to crash...

Important: kernel

Issue Overview: A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS. A local user could use this flaw to crash the system. CVE-2021-20321 A flaw was found in the Linux kernel. A memory leak in the ccp-o...

CVE-2022-49743

In the Linux kernel, the following vulnerability has been resolved: ovl: Use "buf" flexible array for memcpy destination The "buf" flexible array needs to be the memcpy destination to avoid false positive run-time warning from the recent FORTIFYSOURCE hardening: memcpy: detected field-spanning...

SUSE CVE-2022-49743

In the Linux kernel, the following vulnerability has been resolved: ovl: Use "buf" flexible array for memcpy destination The "buf" flexible array needs to be the memcpy destination to avoid false positive run-time warning from the recent FORTIFYSOURCE hardening: memcpy: detected field-spanning...

DEBIAN-CVE-2022-49743

In the Linux kernel, the following vulnerability has been resolved: ovl: Use "buf" flexible array for memcpy destination The "buf" flexible array needs to be the memcpy destination to avoid false positive run-time warning from the recent FORTIFYSOURCE hardening: memcpy: detected field-spanning...

AZL-59405 CVE-2025-21887 affecting package kernel for versions less than 5.15.180.1-1

In the Linux kernel, the following vulnerability has been resolved: ovl: fix UAF in ovldentryupdatereval by moving dput in ovllinkup The issue was caused by dputupper being called before ovldentryupdatereval, while upper-dflags was still accessed in ovldentryremote. Move dputupper after its last...

CVE-2025-21887

In CVE-2025-21887, the Linux kernel overlayfs (ovl) had a use-after-free in ovl_dentry_remote/ovl_dentry_update_reval caused by calling dput(upper) before upper is no longer safe to use; the fix moves dput(upper) to after its final use in ovl_link_up, preventing the UAF. The issue is addressed in...

Linux kernel 安全漏洞

Linux kernel is the kernel used by Linux, the open source operating system of the Linux Foundation in the United States. A security vulnerability exists in the Linux kernel that stems from overlayfs not properly handling tmpfile cleanup...

CVE-2025-21887: Use After Free

In the Linux kernel, the following vulnerability has been resolved: ovl: fix UAF in ovldentryupdatereval by moving dput in ovllinkup The issue was caused by dputupper being called before ovldentryupdatereval, while upper-dflags was still accessed in ovldentryremote. Move dputupper after its last...

GHSA-265R-HFXG-FHMG vulnerabilities

Vulnerabilities for packages: ctop, opa, k3s, docker, cluster-api-helm-controller, kaniko, linkerd2, dagger, grype, newrelic-infrastructure-agent, kubevela, k8sgpt, osv-scanner, helm-operator, chartmuseum, kubescape, kargo, xeol, k8ssandra-client, eksctl, opa-envoy, helm-push, zot, trivy,...

fuse-overlayfs bug fix and enhancement update

An update is available for fuse-overlayfs. This update affects Rocky Linux 9. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list For detailed information on changes in this release, see the Rocky Lin...

Linux Distros Unpatched Vulnerability : CVE-2025-21654

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - In the Linux kernel, the following vulnerability has been resolved: ovl: support encoding fid from inode with no alias Dmitry Safonov reported that a WARNON...

Linux Distros Unpatched Vulnerability : CVE-2024-56570

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - ovl: Filter invalid inodes with missing lookup function Add a check to the ovldentryweird function to prevent the processing of directory inodes that lack the...

Linux Distros Unpatched Vulnerability : CVE-2019-10140

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - A vulnerability was found in Linux kernel's, versions up to 3.10, implementation of overlayfs. An attacker with local access can create a denial of service...

Linux Distros Unpatched Vulnerability : CVE-2019-15794

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Overlayfs in the Linux kernel and shiftfs, a non-upstream patch to the Linux kernel included in the Ubuntu 5.0 and 5.3 kernel series, both replace vma-vmfile in...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: ovl: Filtering invalid inodes with a missing lookup function. A check has been added to the ovldentryweird function to prevent the processing of directory inodes that lack the lookup function. This is important because such inode...

PT-2025-20513

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description The issue is related to the overlayfs in the Linux kernel, where it was possible for the upper layer to directly refer to a data layer without a lowerdir, which could result in an Oops...

CVE-2025-21654

In the Linux kernel, the following vulnerability has been resolved: ovl: support encoding fid from inode with no alias Dmitry Safonov reported that a WARNON assertion can be trigered by userspace when calling inotifyshowfdinfo for an overlayfs watched inode, whose dentry aliases were discarded wi...

SUSE CVE-2025-21654

In the Linux kernel, the following vulnerability has been resolved: ovl: support encoding fid from inode with no alias Dmitry Safonov reported that a WARNON assertion can be trigered by userspace when calling inotifyshowfdinfo for an overlayfs watched inode, whose dentry aliases were discarded wi...

CVE-2024-57924

In the Linux kernel, the following vulnerability has been resolved: fs: relax assertions on failure to encode file handles Encoding file handles is usually performed by a filesystem encodefh method that may fail for various reasons. The legacy users of exportfsencodefh, namely, nfsd and...