USN-8278-1: Linux kernel vulnerabilities

It was discovered that the Linux kernel algifaead module did not properly handle in-place cryptographic operations. This flaw is known as Copy Fail. A local attacker could use this to escalate privileges, or possibly escape a container. CVE-2026-31431 Several security issues were discovered in th...

Important: kernel

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: net: clear the dst when changing skb protocol CVE-2025-38192 In the Linux kernel, the following vulnerability has been resolved: rcu/nocb: Fix possible invalid rdp's-nocbcbkthread pointer access CVE-2025-38704 In...

UBUNTU-CVE-2026-43442

In the Linux kernel, the following vulnerability has been resolved: iouring: fix physical SQE bounds check for SQEMIXED 128-byte ops When IORINGSETUPSQEMIXED is used without IORINGSETUPNOSQARRAY, the boundary check for 128-byte SQE operations in ioinitreq validated the logical SQ head position...

PT-2026-39103

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the io uring component where the boundary check for 128-byte Submission Queue Entry SQE operations in the io init req function validates the logical SQ head position...

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 physical SQE boundary-checking error involving a 128-byte operation in iouring, potentially...

Linux Distros Unpatched Vulnerability : CVE-2026-43174

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - iouring/zcrx: fix post open error handling Closing a queue doesn't guarantee that all associated page pools are terminated right away, let the refcounting do th...

CVE-2026-43224 io_uring/zcrx: fix sgtable leak on mapping failures

In the Linux kernel, the following vulnerability has been resolved: iouring/zcrx: fix sgtable leak on mapping failures In an unlikely case when iopopulateareadma fails, which could only happen on a PAGEPOOL32BITARCHWITH64BITDMA machine, iozcrxmaparea will have an initialised and not freed table. ...

CVE-2026-43121 io_uring/zcrx: fix user_ref race between scrub and refill paths

In the Linux kernel, the following vulnerability has been resolved: iouring/zcrx: fix userref race between scrub and refill paths The iozcrxputniovuref function uses a non-atomic check-then-decrement pattern atomicread followed by separate atomicdec to manipulate userrefs. This is serialized...

PT-2026-37461

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A race condition exists in the io uring/zcrx component on SMP systems between the scrub and refill paths. The io zcrx put niov uref function employs a non-atomic check-then-decrement...

PT-2026-37514

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the io uring/zcrx component where closing a queue does not guarantee the immediate termination of all associated page pools. The system incorrectly releases the zcrx...

Exploit for Incorrect Resource Transfer Between Spheres in Linux Linux_Kernel

CVE-2026-31431: Detection & Defense Against iouring Bypass of...

CVE-2026-31774

The CVE-2026-31774 issue affects the Linux kernel io_uring/net path. A 32-bit length value (sqe->len) is stored into sr->len (int), allowing values above INT_MAX (e.g., 0xFFFFFFFF) to overflow and propagate through the bundle recv/send path. This can cause a slab-out-of-bounds read in io_bu...

PT-2026-36423

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the io uring subsystem where the validate fixed range function allows a buffer address at the exact end of a registered region when the length is zero. This occurs...

PT-2026-36409

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the io uring network component where a slab-out-of-bounds read can occur in the io bundle nbufs function. This happens when userspace provides a sqe-len value exceedin...

Important: kernel6.18

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: nvme: fix memory allocation in nvmeprreadkeys CVE-2026-23244 In the Linux kernel, the following vulnerability has been resolved: net/sched: actgate: snapshot parameters with RCU on replace CVE-2026-23245 In the...

Amazon Linux 2023 : bpftool6.18, kernel6.18, kernel6.18-devel (ALAS2023-2026-1596)

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1596 advisory. In the Linux kernel, the following vulnerability has been resolved: nvme: fix memory allocation in nvmeprreadkeys CVE-2026-23244 In the Linux kernel, the following vulnerability has been...

CVE-2026-31484

A flaw was found in the Linux kernel. A local user could potentially exploit an out-of-bounds read vulnerability in the iouring/fdinfo component, specifically within the iouringshowfdinfo function. This issue arises from an incorrect wrap check when processing 128-byte Submission Queue Entries SQ...

USN-8183-1 linux-gcp, linux-gcp-6.17 vulnerabilities

Josh Eads, Kristoffer Janke, Eduardo Vela Nava, Tavis Ormandy, and Matteo Rizzo discovered that some AMD Zen processors did not properly verify the signature of CPU microcode. This flaw is known as EntrySign. A privileged attacker could possibly use this issue to cause load malicious CPU microcod...

USN-8177-1 linux, linux-realtime vulnerabilities

Josh Eads, Kristoffer Janke, Eduardo Vela Nava, Tavis Ormandy, and Matteo Rizzo discovered that some AMD Zen processors did not properly verify the signature of CPU microcode. This flaw is known as EntrySign. A privileged attacker could possibly use this issue to cause load malicious CPU microcod...

Unbreakable Enterprise kernel security update

6.12.0-201.74.2.1 - Revert 'rds: Drop rds conn in connect worker if not in down state.' Vijayendra Suman Orabug: 39200413 - iouring/kbuf: check if target buffer list is still legacy on recycle Jens Axboe Orabug: 39202438 - ipv6: use RCU in ip6xmit Eric Dumazet Orabug: 39202432 CVE-2025-40135 - ds...