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: net: skbuff: Fixed an issue where a missing zerocopy reference was present in the pskbcarve helpers. Both pskbcarveinsideheader and pskbcarveinsidenonlinear copy the old skbsharedinfo header into a new buffer using memcpy. Thi...

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

In the Linux kernel, the following vulnerability has been resolved: net/rds: opnents is reset when zerocopy page pin fails. When iovitergetpages2 fails in rdsmessagezcopyfromuser, the pinned pages are released using putpage, and rm-data.opmmpznotifier is cleared. However, we fail to properly clea...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: In the net: gro subsystem, do not merge the zcopy state when copying fragments between the source skb and the GRO skb. The skbgroreceive function currently copies fragments between the source skb and the GRO skb, without checking...

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

In the Linux kernel, the following vulnerability has been resolved: net/rds: Handle the cleanup after a zerocopy send occurs, 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 currentl...

Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: fixed the zerocopy completion for multi-skbs sends When a large message is fragmented into multiple skbs, the zerocopy uarg is only allocated and attached to the last skb in the loop. Non-final skbs carry pinned use...

PT-2026-94901

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the esp ssg unref function where it incorrectly releases page references on the source scatterlist after an AEAD operation. When a socket buffer skb contains managed...

PT-2026-94505

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the cgroup getsockopt BPF program where the ctx-optlen can be shrunk after the kernel getsockopt handler has executed. In the kernel-buffer variant used by TCP ZEROCOP...

PT-2026-93690

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the skb zerocopy function where it incorrectly calls skb tx error on the source skb during an skb orphan frags failure. This operation is destructive to the source skb...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerability has been resolved: In the net: stream module, the purge skerrorqueue operation in skstreamkillqueues has been fixed. Changheon Lee reported TCP socket leaks, with a detailed reproduction guide. It appears that we encounter TCP socket leaks in the...

Astra Linux – Vulnerabilities in Linux, Linux-5.10, Linux-5.15

In the Linux kernel, the following vulnerabilities have been resolved: TCP/UDP: Fixed memory leaks related to sk and zerocopy SKBS with TX timestamps. Syzkaller reported 0 memory leaks of an UDP socket and ZEROCOPY SKBS. We can reproduce this issue with the following sequence: sk = socketAFINET,...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: TCP: Add sanity checks to rx zerocopy The purpose of TCP rx zerocopy is to map pages that are initially allocated by NIC drivers, not pages owned by a file system. This patch adds the following additional checks to canmapfrag:...

Astra Linux – Vulnerability in Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: TCP: TX zerocopy should not access the pfmemalloc status. We received a recent syzbot report 1 indicating a possible misuse of the page status in TCP zerocopy paths. Indeed, for pages originating from user space or other layers,...

SUSE CVE-2026-80977

In the Linux kernel, the following vulnerability has been resolved: net: skbuff: don't touch shared zerocopy state in skbtxerror skbtxerror completes the zerocopy uarg and clears SKBFLALLZEROCOPY, and skbzcopydowngrademanaged clears SKBFLMANAGEDFRAGREFS. Both live in skbshinfo, which every clone...

Linux Distros Unpatched Vulnerability : CVE-2026-80977

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - net: skbuff: don't touch shared zerocopy state in skbtxerror skbtxerror completes the zerocopy uarg and clears SKBFLALLZEROCOPY, and skbzcopydowngrademanaged...

CVE-2026-80977

A flaw was found in the Linux kernel's networking subsystem. The skbtxerror function improperly handles shared zerocopy state in socket buffers skbs. When a cloned skb is processed, it can prematurely signal that its pages are free and drop shared fragment flags while the original skb is still in...

AZL-100568 CVE-2026-89487 affecting package kernel for versions less than 6.6.157.1-1

In the Linux kernel, the following vulnerability has been resolved: openvswitch: only skbtxerror a packet we are about to drop queueuserspacepacket borrows the packet skb -- it only copies it into a private netlink message userskb and does not own it; on return doexecuteactions keeps forwarding i...

DEBIAN-CVE-2026-89487

In the Linux kernel, the following vulnerability has been resolved: openvswitch: only skbtxerror a packet we are about to drop queueuserspacepacket borrows the packet skb -- it only copies it into a private netlink message userskb and does not own it; on return doexecuteactions keeps forwarding i...

CVE-2026-89487

In the Linux kernel, the following vulnerability has been resolved: openvswitch: only skbtxerror a packet we are about to drop queueuserspacepacket borrows the packet skb -- it only copies it into a private netlink message userskb and does not own it; on return doexecuteactions keeps forwarding i...

DEBIAN-CVE-2026-80977

In the Linux kernel, the following vulnerability has been resolved: net: skbuff: don't touch shared zerocopy state in skbtxerror skbtxerror completes the zerocopy uarg and clears SKBFLALLZEROCOPY, and skbzcopydowngrademanaged clears SKBFLMANAGEDFRAGREFS. Both live in skbshinfo, which every clone...

AZL-100274 CVE-2026-80977 affecting package kernel for versions less than 6.6.157.1-1

In the Linux kernel, the following vulnerability has been resolved: net: skbuff: don't touch shared zerocopy state in skbtxerror skbtxerror completes the zerocopy uarg and clears SKBFLALLZEROCOPY, and skbzcopydowngrademanaged clears SKBFLMANAGEDFRAGREFS. Both live in skbshinfo, which every clone...