Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, Linux, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: openvswitch: Use RCU protection in ovsvportcmdfillinfo. ovsvportcmdfillinfo can be called without RTNL or RCU. Use RCU protection and devnetrcu to avoid potential UAF Use-After-Free errors...

CVE-2026-43214

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Add SRCU protection for reading PDPTRs in getsregs2 Add SRCU read-side protection when reading PDPTR registers in getsregs2. Reading PDPTRs may trigger access to guest memory: kvmpdptrread - svmcachereg - loadpdptrs -...

Amazon Linux 2023 : bpftool6.12, kernel6.12, kernel6.12-devel (ALAS2023-2026-1646)

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1646 advisory. In the Linux kernel, the following vulnerability has been resolved: landlock: Fix handling of disconnected directories CVE-2025-68736 In the Linux kernel, the following vulnerability has been...

CVE-2026-43050

In the Linux kernel, the following vulnerability has been resolved: atm: lec: fix use-after-free in sockdefreadable A race condition exists between lecatmclose setting priv-lecd to NULL and concurrent access to priv-lecd in sendtolecd, lechandlebridge, and lecatmsend. When the socket is freed via...

kernel: macvlan: fix possible UAF in macvlan_forward_source()

In the Linux kernel, the following vulnerability has been resolved: macvlan: fix possible UAF in macvlanforwardsource Add RCU protection on struct macvlansourceentry-vlan. Whenever macvlanhashdelsource is called, we must clear entry-vlan pointer before RCU grace period starts. This allows...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-007555)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-007555 advisory. In the Linux kernel, the following vulnerability has been resolved: atm: clip: Fix potential null-ptr-deref in toatmarpd. atmarpd is protected by RTNL since commit...

kernel: macvlan: fix possible UAF in macvlan_forward_source()

In the Linux kernel, the following vulnerability has been resolved: macvlan: fix possible UAF in macvlanforwardsource Add RCU protection on struct macvlansourceentry-vlan. Whenever macvlanhashdelsource is called, we must clear entry-vlan pointer before RCU grace period starts. This allows...

kernel: smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match()

A flaw was found in the Linux kernel’s SMC Shared Memory Communication module: in smcclcprfxmatch, the function is called from smclistenwork without proper RCU or RTNL protection. The code previously used skdstgetsk-dev, which can lead to a use-after-free UAF condition if the sk’s destination is...

kernel: macvlan: fix possible UAF in macvlan_forward_source()

In the Linux kernel, the following vulnerability has been resolved: macvlan: fix possible UAF in macvlanforwardsource Add RCU protection on struct macvlansourceentry-vlan. Whenever macvlanhashdelsource is called, we must clear entry-vlan pointer before RCU grace period starts. This allows...

CVE-2026-23437

CVE-2026-23437 (Linux kernel) concerns the net: shaper module. A missing liveness check occurs when a netdev is looked up during prep of Netlink operations, a reference is taken, and later the code uses the netdev’s lock or RCU protections. The conversion from a ref to a locked netdev may proceed...

PT-2026-30132

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description The Linux kernel contained a flaw where late read accesses to the network device hierarchy were not properly protected. A missing liveness check during the conversion from a reference to...

CVE-2026-23415 futex: Fix UaF between futex_key_to_node_opt() and vma_replace_policy()

In the Linux kernel, the following vulnerability has been resolved: futex: Fix UaF between futexkeytonodeopt and vmareplacepolicy During futexkeytonodeopt execution, vma-vmpolicy is read under speculative mmap lock and RCU. Concurrently, mbind may call vmareplacepolicy which frees the old mempoli...

Amazon Linux 2023 : bpftool6.18, kernel6.18, kernel6.18-devel (ALAS2023-2026-1514)

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1514 advisory. In the Linux kernel, the following vulnerability has been resolved: btrfs: fix reservation leak in some error paths when inserting inline extent CVE-2025-71268 In the Linux kernel, the followi...

kernel: macvlan: fix possible UAF in macvlan_forward_source()

In the Linux kernel, the following vulnerability has been resolved: macvlan: fix possible UAF in macvlanforwardsource Add RCU protection on struct macvlansourceentry-vlan. Whenever macvlanhashdelsource is called, we must clear entry-vlan pointer before RCU grace period starts. This allows...

SUSE CVE-2026-23275

In the Linux kernel, the following vulnerability has been resolved: iouring: ensure ctx-rings is stable for task work flags manipulation If DEFERTASKRUN | SETUPTASKRUN is used and task work is added while the ring is being resized, it's possible for the OR'ing of IORINGSQTASKRUN to happen in the...

CVE-2026-23275

CVE-2026-23275 (Linux kernel, io_uring): The issue arises when DEFER_TASKRUN | SETUP_TASKRUN are used and task work is added while the ring is resized, allowing an overlap window where IORING_SQ_TASKRUN could be OR’ed on the old/new rings during swapping. The fix adds a 2nd rings pointer, →rings_...

CVE-2026-23275

In the Linux kernel, the following vulnerability has been resolved: iouring: ensure ctx-rings is stable for task work flags manipulation If DEFERTASKRUN | SETUPTASKRUN is used and task work is added while the ring is being resized, it's possible for the OR'ing of IORINGSQTASKRUN to happen in the...

DEBIAN-CVE-2026-23255

In the Linux kernel, the following vulnerability has been resolved: net: add proper RCU protection to /proc/net/ptype Yin Fengwei reported an RCU stall in ptypeseqshow and provided a patch. Real issue is that ptypeseqnext and ptypeseqshow violate RCU rules. ptypeseqshow runs under rcureadlock, an...

CVE-2026-23255

The connected Amazon Linux advisory confirms CVE-2026-23255 is a Linux kernel vulnerability where /proc/net/ptype lacked proper RCU protection. The fix adds an explicit device pointer tracking and ensures RCU-compliant reads in ptype_seq_show(), with full READ_ONCE protection in ptype_seq_next() ...

CVE-2026-23245

In the Linux kernel, the following vulnerability has been resolved: net/sched: actgate: snapshot parameters with RCU on replace The gate action can be replaced while the hrtimer callback or dump path is walking the schedule list. Convert the parameters to an RCU-protected snapshot and swap update...