EUVD-2026-21946

In the Linux kernel, the following vulnerability has been resolved: net/sched: clsflow: fix NULL pointer dereference on shared blocks flowchange calls tcfblockq and dereferences q-handle to derive a default baseclass. Shared blocks leave block-q NULL, causing a NULL deref when a flow filter witho...

CVE-2026-31424

In the Linux kernel, the following vulnerability has been resolved: netfilter: xtables: restrict xtcheckmatch/xtchecktarget extensions for NFPROTOARP Weiming Shi says: xtmatch and xttarget structs registered with NFPROTOUNSPEC can be loaded by any protocol family through nftcompat. When such a...

CVE-2026-31425

In the Linux kernel, the following vulnerability has been resolved: rds: ib: reject FRMR registration before IB connection is established rdsibgetmr extracts the rdsibconnection from conn-ctransportdata and passes it to rdsibregfrmr for FRWR memory registration. On a fresh outgoing connection, ic...

CVE-2026-31422

In the Linux kernel, the following vulnerability has been resolved: net/sched: clsflow: fix NULL pointer dereference on shared blocks flowchange calls tcfblockq and dereferences q-handle to derive a default baseclass. Shared blocks leave block-q NULL, causing a NULL deref when a flow filter witho...

CVE-2026-31421

In the Linux kernel, the following vulnerability has been resolved: net/sched: clsfw: fix NULL pointer dereference on shared blocks The old-method path in fwclassify calls tcfblockq and dereferences q-handle. Shared blocks leave block-q NULL, causing a NULL deref when an empty clsfw filter is...

UBUNTU-CVE-2026-31421

In the Linux kernel, the following vulnerability has been resolved: net/sched: clsfw: fix NULL pointer dereference on shared blocks The old-method path in fwclassify calls tcfblockq and dereferences q-handle. Shared blocks leave block-q NULL, causing a NULL deref when an empty clsfw filter is...

CVE-2026-31421

In the Linux kernel, the following vulnerability has been resolved: net/sched: clsfw: fix NULL pointer dereference on shared blocks The old-method path in fwclassify calls tcfblockq and dereferences q-handle. Shared blocks leave block-q NULL, causing a NULL deref when an empty clsfw filter is...

CVE-2026-31421 net/sched: cls_fw: fix NULL pointer dereference on shared blocks

In the Linux kernel, the following vulnerability has been resolved: net/sched: clsfw: fix NULL pointer dereference on shared blocks The old-method path in fwclassify calls tcfblockq and dereferences q-handle. Shared blocks leave block-q NULL, causing a NULL deref when an empty clsfw filter is...

CVE-2026-31421

CVE-2026-31421 – Linux kernel net/sched cls_fw NULL pointer dereference . Root cause: in fw_classify(), the old-method path uses tcf_block_q() and dereferences q->handle; for shared blocks, block->q is NULL, causing a NULL pointer dereference when a nonzero skb is classified. The fix preven...

CVE-2026-31422 net/sched: cls_flow: fix NULL pointer dereference on shared blocks

In the Linux kernel, the following vulnerability has been resolved: net/sched: clsflow: fix NULL pointer dereference on shared blocks flowchange calls tcfblockq and dereferences q-handle to derive a default baseclass. Shared blocks leave block-q NULL, causing a NULL deref when a flow filter witho...

CVE-2026-31422

In the Linux kernel, the following vulnerability has been resolved: net/sched: clsflow: fix NULL pointer dereference on shared blocks flowchange calls tcfblockq and dereferences q-handle to derive a default baseclass. Shared blocks leave block-q NULL, causing a NULL deref when a flow filter witho...

CVE-2026-31422

In the Linux kernel, the following vulnerability has been resolved: net/sched: clsflow: fix NULL pointer dereference on shared blocks flowchange calls tcfblockq and dereferences q-handle to derive a default baseclass. Shared blocks leave block-q NULL, causing a NULL deref when a flow filter witho...

CVE-2026-31421

In the Linux kernel, the following vulnerability has been resolved: net/sched: clsfw: fix NULL pointer dereference on shared blocks The old-method path in fwclassify calls tcfblockq and dereferences q-handle. Shared blocks leave block-q NULL, causing a NULL deref when an empty clsfw filter is...

CVE-2026-31422

CVE-2026-31422 affects the Linux kernel’s net/sched subsystem. The vulnerability occurs in flow_change() where tcf_block_q() dereferences q->handle to derive a default baseclass for shared blocks, while block->q can be NULL for shared blocks. The fix adds a check of tcf_block_shared() befor...

LSN-0119-1 Kernel Live Patch Security Notice

In the Linux kernel, the following vulnerability has been resolved: btrfs: ref-verify: fix use-after-free after invalid ref action At btrfsreftreemod after we successfully inserted the new ref entry local variable 'ref' into the respective block entry's rbtree local variable 'be', if we find an...

Nitro PDF Pro 安全漏洞

Nitro PDF Pro is a PDF editing and management tool developed by the American company Nitro. Version 14.41.1.4 of Nitro PDF Pro contains a security vulnerability, which stems from a null pointer dereferencing in the appAlert function, potentially causing the application to crash...

Nitro PDF Pro 安全漏洞

Nitro PDF Pro is a PDF editing and management tool developed by the American company Nitro. Version 14.41.1.4 of Nitro PDF Pro contains a security vulnerability, which stems from a null pointer dereferencing, potentially leading to a denial-of-service attack...

Linux kernel 安全漏洞

The Linux kernel is the core of the open-source operating system Linux, developed by the Linux Foundation in the United States. There is a security vulnerability in the Linux kernel, which stems from the improper restrictions imposed by the xtcheckmatch/xtchecktarget extensions on NFPROTOARP. Thi...

Linux kernel 安全漏洞

The Linux kernel is the core of the open-source operating system Linux, developed by the Linux Foundation in the United States. There is a security vulnerability in the Linux kernel, which stems from a null pointer dereferencing in the clsflow module when shared blocks are involved, potentially...

CVE-2025-69624

Nitro PDF Pro for Windows 14.41.1.4 contains a NULL pointer dereference vulnerability in the JavaScript implementation of app.alert. When app.alert is called with more than one argument and the first argument evaluates to null for example, app.alertapp.activeDocs, true when app.activeDocs is null...