netfilter: nf_conntrack_sip: don't use simple_strtoul

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Linux Distros Unpatched Vulnerability : CVE-2026-52986

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - netfilter: nfconntracksip: don't use simplestrtoul Replace unsafe port parsing in epaddrlen, ctsipparseheaderuri, and ctsipparserequest with a new sipparseport...

CVE-2026-52986

The CVE-2026-52986 issue affects the Linux kernel netfilter nf_conntrack_sip module, where unsafe port parsing on non-NUL-terminated data allowed malformed SIP packets to affect conntrack processing. The fix introduces a dedicated sip_parse_port() that validates each digit against the buffer limi...

CVE-2026-52986

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfconntracksip: don't use simplestrtoul Replace unsafe port parsing in epaddrlen, ctsipparseheaderuri, and ctsipparserequest with a new sipparseport helper that validates each digit against the buffer limit, eliminatin...

CVE-2026-52986 netfilter: nf_conntrack_sip: don't use simple_strtoul

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfconntracksip: don't use simplestrtoul Replace unsafe port parsing in epaddrlen, ctsipparseheaderuri, and ctsipparserequest with a new sipparseport helper that validates each digit against the buffer limit, eliminatin...

CVE-2026-52986 netfilter: nf_conntrack_sip: don't use simple_strtoul

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfconntracksip: don't use simplestrtoul Replace unsafe port parsing in epaddrlen, ctsipparseheaderuri, and ctsipparserequest with a new sipparseport helper that validates each digit against the buffer limit, eliminatin...

PT-2026-51880

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the netfilter nf conntrack sip module due to unsafe port parsing. The system used the simple strtoul function, which assumes strings are NUL-terminated, on...

Important: kernel6.18

Issue Overview: In the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: Drop/zap existing present SPTE even when creating an MMIO SPTE CVE-2026-23401 In the Linux kernel, the following vulnerability has been resolved: KVM: x86/mmu: Only WARN in direct MMUs when overwriti...

Important: kernel6.12

Issue Overview: 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 resolved: arm64/fpsimd: signal: Fix restoration of SVE context CVE-2026-23102 In the Linu...

EUVD-2026-21954

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfconntracksip: fix use of uninitialized rtpaddr in processsdp processsdp declares union nfinetaddr rtpaddr on the stack and passes it to the nfnatsip sdpsession hook after walking the SDP media descriptions. However...

CVE-2026-31427

The CVE-2026-31427 issue in Linux kernel netfilter/nf_conntrack_sip was fixed by initializing the rtp_addr before calling nf_nat_sip SDP hooks and tracking via a have_rtp_addr flag. If SDP has no m= lines, or contains only inactive/unrecognized media, the code now avoids calling sdp_session with ...

PT-2026-32353

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description In the netfilter module, the process sdp function declares a union nf inet addr named rtp addr on the stack. This variable is only initialized when a recognized media type with a non-zer...

UBUNTU-CVE-2026-23457

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfconntracksip: fix Content-Length u32 truncation in siphelptcp siphelptcp parses the SIP Content-Length header with simplestrtoul, which returns unsigned long, but stores the result in unsigned int clen. On 64-bit...

CVE-2026-23457 netfilter: nf_conntrack_sip: fix Content-Length u32 truncation in sip_help_tcp()

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfconntracksip: fix Content-Length u32 truncation in siphelptcp siphelptcp parses the SIP Content-Length header with simplestrtoul, which returns unsigned long, but stores the result in unsigned int clen. On 64-bit...