UBUNTU-CVE-2025-40190

In the Linux kernel, the following vulnerability has been resolved: ext4: guard against EA inode refcount underflow in xattr update syzkaller found a path where ext4xattrinodeupdateref reads an EA inode refcount that is already ref underflow: refcount=-1 refchange=-1 EXT4-fs warning: eainode dec...

CVE-2025-40190 ext4: guard against EA inode refcount underflow in xattr update

In the Linux kernel, the following vulnerability has been resolved: ext4: guard against EA inode refcount underflow in xattr update syzkaller found a path where ext4xattrinodeupdateref reads an EA inode refcount that is already ref underflow: refcount=-1 refchange=-1 EXT4-fs warning: eainode dec...

CVE-2025-40190

CVE-2025-40190 affects the Linux kernel ext4: EA inode refcount underflow during xattr updates. The root cause is in ext4_xattr_inode_update_ref(), where a non-positive refcount could be decremented (ref_change -1), leading to underflow and errors. The fix enforces that if the current refcount is...

CVE-2025-40190

In the Linux kernel, the following vulnerability has been resolved: ext4: guard against EA inode refcount underflow in xattr update syzkaller found a path where ext4xattrinodeupdateref reads an EA inode refcount that is already ref underflow: refcount=-1 refchange=-1 EXT4-fs warning: eainode dec...

CVE-2025-40186

CVE-2025-40186 is a Linux kernel vulnerability described for Unity/Linux kernels: when handling TCP Fast Open (TFO), a call to reqsk_fastopen_remove() in tcp_conn_request() can trigger refcount underflow and double-free of the request_sockets object. The fix removes reqsk_fastopen_remove() from t...

CVE-2025-40186

In the Linux kernel, the following vulnerability has been resolved: tcp: Don't call reqskfastopenremove in tcpconnrequest. syzbot reported the splat below in tcpconnrequest. 0 If a listener is closed while a TFO socket is being processed in tcpconnrequest, inetcskreqskqueueadd does not set reqsk-...

CVE-2025-40190: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: ext4: guard against EA inode refcount underflow in xattr update syzkaller found a path where ext4xattrinodeupdateref reads an EA inode refcount that is already = 0 and then applies refchange often -1. That lets the refcount...

CVE-2025-40191: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Fix kfd process ref leaking when userptr unmapping kfdlookupprocessbypid hold the kfd process reference to ensure it doesn't get destroyed while sending the segfault event to user space. Calling kfdlookupprocessbypid ...

CVE-2025-40186: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: tcp: Don't call reqskfastopenremove in tcpconnrequest. syzbot reported the splat below in tcpconnrequest. 0 If a listener is closed while a TFO socket is being processed in tcpconnrequest, inetcskreqskqueueadd does not set reqsk-...

kernel: powerpc/xive: Fix refcount leak in xive_spapr_init

In the Linux kernel, the following vulnerability has been resolved: powerpc/xive: Fix refcount leak in xivespaprinit offindcompatiblenode returns a node pointer with refcount incremented, we should use ofnodeput on it when done. Add missing ofnodeput to avoid refcount leak...

kernel: powerpc/xics: fix refcount leak in icp_opal_init()

In the Linux kernel, the following vulnerability has been resolved: powerpc/xics: fix refcount leak in icpopalinit The offindcompatiblenode function returns a node pointer with refcount incremented, use ofnodeput on it when done...

kernel: blk-cgroup: Fix class @block_class's subsystem refcount leakage

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: Fix class @blockclass's subsystem refcount leakage blkcgfillrootiostats iterates over @blockclass's devices by classdeviterinit|next, but does not end iterating with classdeviterexit, so causes the class's subsystem...

kernel: ipvlan: Fix use-after-free in ipvlan_get_iflink().

In the Linux kernel, the following vulnerability has been resolved: ipvlan: Fix use-after-free in ipvlangetiflink. syzbot presented an use-after-free report 0 regarding ipvlan and linkwatch. ipvlan does not hold a refcnt of the lower device unlike vlan and macvlan. If the linkwatch work is...

OESA-2025-2632 kernel security update

The Linux Kernel, the operating system core itself. Security Fixes: In the Linux kernel, the following vulnerability has been resolved: SUNRPC: make sure cache entry active before cacheshow The function cshow was called with protection from RCU. This only ensures that cp will not be freed...

OESA-2025-2636 kernel security update

The Linux Kernel, the operating system core itself. Security Fixes: In the Linux kernel, the following vulnerability has been resolved: gfs2: Fix possible data races in gfs2showoptions Some fields such as gtlogdsecs of the struct gfs2tune are accessed without holding the lock gtspin in...

PT-2025-51658

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A flaw exists in the Linux kernel's netpoll functionality related to incorrect reference counting during cleanup operations. A previously committed fix efa95b01da18, "netpoll: fix use...

Unity Linux 20.1070a Security Update: kernel (UTSA-2025-990502)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-990502 advisory. In the Linux kernel, the following vulnerability has been resolved: ata: pataocteoncf: Fix refcount leak in octeoncfprobe offinddevicebynode takes reference, we shou...

Unity Linux 20.1070a Security Update: kernel (UTSA-2025-990390)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-990390 advisory. In the Linux kernel, the following vulnerability has been resolved: soc: rockchip: Fix refcount leak in rockchipgrfinit offindmatchingnodeandmatch returns a node...

Unity Linux 20.1070a Security Update: kernel (UTSA-2025-990512)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-990512 advisory. In the Linux kernel, the following vulnerability has been resolved: net: altera: Fix refcount leak in alteratsemdiocreate Every iteration of foreachchildofnode...

Unity Linux 20.1070a Security Update: kernel (UTSA-2025-990468)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-990468 advisory. In the Linux kernel, the following vulnerability has been resolved: pinctrl: devicetree: fix refcount leak in pinctrldttomap If we fail to allocate propname buffer, ...