May "In the Trend of VM" (#27): high-profile vulnerabilities in Linux, ActiveMQ, SharePoint, and Adobe Acrobat Reader

May "In the Trend of VM" 27: high-profile vulnerabilities in Linux, ActiveMQ, SharePoint, and Adobe Acrobat Reader. Presenting the traditional monthly roundup of trending vulnerabilities according to Positive Technologies. While the previous April edition featured only one vulnerability, this one...

SUSE CVE-2026-43449

In the Linux kernel, the following vulnerability has been resolved: nvme-pci: Fix slab-out-of-bounds in nvmedbbufset dev-onlinequeues is a count incremented in nvmeinitqueue. Thus, valid indices are 0 through dev-onlinequeues − 1. This patch fixes the loop condition to ensure the index stays with...

CVE-2026-43502

In the Linux kernel, the following vulnerability has been resolved: net/rds: handle zerocopy send cleanup before the message is queued A zerocopy send can fail after user pages have been pinned but before the message is attached to the sending socket. The purge path currently infers zerocopy stat...

CVE-2026-43496

In the Linux kernel, the following vulnerability has been resolved: net/sched: schred: Replace direct dequeue call with peek and qdiscdequeuepeeked When red qdisc has children eg qfq qdisc whose peek callback is qdiscpeekdequeued, we could get a kernel panic. When the parent of such qdiscs eg...

EUVD-2026-31275

In the Linux kernel, the following vulnerability has been resolved: net/rds: handle zerocopy send cleanup before the message is queued A zerocopy send can fail after user pages have been pinned but before the message is attached to the sending socket. The purge path currently infers zerocopy stat...

CVE-2026-45251 Kernel use-after-free via file descriptor syscalls

A file descriptor can be closed while a thread is blocked in a poll2 or select2 call waiting for that descriptor. Because the blocked thread does not hold a reference to the underlying object, this closure may result in the object being freed while the thread remains blocked. In this situation, t...

PT-2026-42458

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the Reliable Delivery Service RDS implementation where zerocopy send operations can fail after user pages are pinned but before the message is attached to the sending...

FreeBSD 资源管理错误漏洞

FreeBSD is a Unix-like operating system developed by the FreeBSD Foundation. There is a resource management vulnerability in FreeBSD. This vulnerability arises from threads being blocked during poll or select calls when file descriptors are closed. The kernel fails to remove the blocked threads...

PT-2026-42453

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A kernel panic can occur in the Linux kernel when a Random Early Detection RED queueing discipline qdisc has children, such as a Fair Queueing FQ qdisc, whose peek callback is qdisc peek...

kernel: net/sched: Make cake_enqueue return NET_XMIT_CN when past buffer_limit

In the Linux kernel, the following vulnerability has been resolved: net/sched: Make cakeenqueue return NETXMITCN when past bufferlimit The following setup can trigger a WARNING in htbactivate due to the condition: !cl-leaf.q-q.qlen tc qdisc del dev lo root tc qdisc add dev lo root handle 1: htb...

Astra Linux - уязвимость в linux-5.10

In the Linux kernel, the following vulnerability has been resolved: virtio-blk: Avoid use-after-free on suspend/resume In virtblkinithctx, hctx-userdata is set to vq. However, vq is freed during suspension and reallocated during resume. As a result, hctx-userdata becomes invalid after resume,...

Astra Linux - уязвимость в linux-5.10

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlinkqueue: dropping bogus WARN messages This issue occurs when rules are flushed/deleted while the packet is still being processed. Therefore, this WARN message needs to be removed. This warning has existed in som...

Astra Linux - уязвимость в linux-5.10

In the Linux kernel, the following vulnerability has been resolved: iavf: Fixed NULL pointer dereferencing in iavfgetlinkksettings. Fixed a potential NULL pointer dereferencing issue, caused by freeing adapter-vfres in iavfinitgetresources. The previous commit introduced a regression, where...

Astra Linux - уязвимость в linux-5.10, linux

In the Linux kernel, the following vulnerabilities have been resolved: net: stmmac: fixed an issue where a left shift overflow occurred in the DMA queue. When the queue number is greater than 4, a left shift overflow occurs due to the 32-bit integer variable used in calculations. The mask...

Astra Linux - уязвимость в linux-5.10, linux

In the Linux kernel, the following vulnerability has been resolved: nvme-pci: fixed a NULL pointer dereferencing in nvmeallocadmintags. In nvmeallocadmintags, adminq can be set to an error typically -ENOMEM if the blkmqinitqueue call fails to set up the queue. This condition is checked immediatel...

Astra Linux - уязвимость в linux-6.1

In the Linux kernel, the following vulnerability has been resolved: Wifi: iwlwifi: mvm – Ensure that the queue for the offloaded TID exists. The resume code path assumes that the TX queue for the offloaded TID has been configured. At the time of resuming operations, it attempts to synchronize the...

Astra Linux - уязвимость в linux-5.10

In the Linux kernel, the following vulnerability has been resolved: In the blkmqunquiescetagset function, it is necessary to use RCU instead of set-taglistlock. The blkmqadd,delqueuetagset functions add and remove queues from the tagset. These functions ensure that the tagset and queues are marke...

Astra Linux - уязвимость в linux-5.10, linux

In the Linux kernel, the following vulnerabilities have been resolved: kcm: Race conditions occur when accessing skreceivequeue. sk-skreceivequeue is protected by the skb queue lock. However, for KCM sockets, the RX path requires mux-rxlock to protect more than just the skb queue. Nevertheless,...

Astra Linux - уязвимость в linux-5.10, linux-6.1, linux-5.15

In the Linux kernel, the following vulnerabilities have been resolved: RDMA/irdma: Fixed a data race on the CQP request done field. KCSAN detected a data race at the cqprequest-requestdone memory location. This location is accessed without a lock in the irdmahandlecqpop function, while it is bein...

Astra Linux - уязвимость в linux-5.10, linux-6.1

In the Linux kernel, the following vulnerability has been resolved: UBLK: Failure to recover a device if queue setup is interrupted. In ublkctrlendrecovery, if waitforcompletioninterruptible is interrupted by a signal, the queues are not set up successfully. Therefore, we must fail the...