Security Bulletin: Impacted IBM Optim for z/OS 1.0.0, 1.1.0 and 1.2.0 by vulnerabilities in jackc/Pgx, cloudflare/cfSSL, x/net

Summary IBM Optim for z/OS version 1.0.0, 1.1.0 and 1.2.0 depends on open-source packages jackc/Pgx, cloudflare/cfSSL and x/net which are affected by medium, high and critical severity vulnerabilities. IBM Optim for z/OS 2.0.0 resolves these vulnerabilities by upgrading the affected open-source...

net: golang: Go net package: Denial of Service via long CNAME response in LookupCNAME

A flaw was found in the net package of Go golang, specifically when using the LookupCNAME function with the cgo DNS resolver. A remote attacker could exploit this by providing a very long Canonical Name CNAME response. This can trigger a double-free of C memory, leading to a crash and a Denial of...

golang.org/x/net/idna: golang: net/http: golang.org/x/net/idna: Privilege escalation via incorrect Punycode label processing

A flaw was found in golang.org/x/net/idna. ToASCII and ToUnicode incorrectly accept Punycode-encoded labels that decode to an ASCII-only hostname for example, xn--example-.com returns example.com instead of an error. Applications that validate the ASCII form then convert to Unicode may grant acce...

net/url: golang: golang net/url: Denial of Service from quadratic complexity in path resolution

A flaw was found in net/url, a component of golang. This vulnerability arises when resolving relative paths that contain numerous parent directory '..' segments. A remote attacker could exploit this by providing a specially crafted path, leading to quadratic time complexity and excessive memory...

ROS-20260928-73-0059

The vulnerability of the devlratenodesdestroy function in the net/devlink/rate.c module, which is part of the Linux kernel’s networking functions, is related to errors during the update of the link counters. Exploiting this vulnerability could allow an attacker to cause a service failure...

ROS-20260928-73-0053

The vulnerability of the net/sctp component in the Linux operating system is related to pointer dereferencing errors. Exploiting this vulnerability can allow a remote attacker to cause service interruptions...

ROS-20260928-73-0069

The vulnerability of the besendpkttobmc function in the drivers/net/ethernet/emulex/benet/bemain.c file of the be2net network device driver in the Linux kernel is related to the swapping of pointers. Exploiting this vulnerability could allow a remote attacker to cause a service failure...

ROS-20260928-73-0118

The vulnerability of the functions ah6outputdone and ah6output in the Linux kernel’s net/ipv6/ah6.c file is related to incorrect calculation of buffer size. Exploiting this vulnerability could allow an attacker to cause a service failure...

Important: kernel-rt security update

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fixes: kernel: fbcon: Set fbdisplayi-mode to NULL when the mode is released CVE-2025-40323 kernel: ext4: fix e4b bitmap inconsistency reports...

ROS-20260928-73-0106

The vulnerability of the inetdiagmsgsctpladdrsfill function in the net/sctp/diag.c module of the SCTP protocol implementation in the Linux operating system is related to synchronization errors when using a shared resource “Race Condition”. Exploiting this vulnerability can allow an attacker to...

ROS-20260928-73-0047

The vulnerability of the xfrmstatedeletetunnel function in the net/xfrm/xfrmstate.c module of the Linux kernel is related to state management errors. Exploiting this vulnerability could allow an attacker to compromise the confidentiality, integrity, and accessibility of the protected information...

ROS-20260928-73-0125

The vulnerability of the udptunnelnicnetdeviceevent function in the net/ipv4/udptunnelnic.c module of the Linux kernel’s IPv4 protocol implementation is related to the distribution of resources without any restrictions or regulation. Exploiting this vulnerability could allow an attacker to...

CVE-2026-18416: Out-of-bounds Read

The CoAP link-format helper matchpathuri in subsys/net/lib/coap/coaplinkformat.c compares a registered resource path against the URI carried in a Uri-Query href= option. That URI is not NUL terminated, but the inner character loop advanced its index k once per path character without ever testing ...

ROS-20260928-73-0064

The vulnerability of the mptcpschedulework function in the net/mptcp/protocol.c module of the MPTCP protocol implementation in the Linux operating system is related to synchronization errors when using shared resources „Race Conditions“. Exploiting this vulnerability can allow a malicious actor t...

CVE-2026-100705 Kyverno before 1.19.1 SSRF via legacy apiCall service executor

Kyverno before 1.19.1 is vulnerable to server-side request forgery. The default egress blocklist 169.254.169.254, 169.254.169.253, metadata.google.internal, 127.0.0.0/8, ::1/128 and the scoped-token control were wired only into the new CEL http.Get/Post library and were never applied to the legac...

Astra Linux – Vulnerability found in Linux 6.1, Linux 6.12

In the Linux kernel, the following vulnerabilities have been resolved: net/sched: Fixed a issue where partial COW operations by pedit led to corruption of the page cache. tcfpeditact calculates the COW range for skbensurewritable once before the key loop, using tcfpoffmaxhint. However, this hint...

Astra Linux – Vulnerability found in Linux 6.1, Linux 6.12

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 6.1, Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: net/tls: The use-after-free issue in the -EBUSY error handling path of tlsdoencryption has been fixed. The -EBUSY handling in tlsdoencryption, introduced with commit 859054147318 “net: tls: handle backlogging of crypto requests”,...

CLEANSTART-2026-HE08866 When returning errors, functions in the net/textproto package would include its input as part of the error

Security vulnerability affects the loki package. When returning errors, functions in the net/textproto package would include its input as part of the error...

SUSE CVE-2026-98104

In the Linux kernel, the following vulnerability has been resolved: net/sched: clsu32: fix duplicate handle when node ID pool is exhausted gennewkid falls back to returning max htid | 0xFFF when both idrallocu32 ranges are full, instead of reporting an error. u32change trusts that value and inser...