Medium severity5.5NVD Advisory· Published May 28, 2026· Updated Oct 15, 2026
CVE-2026-46172
CVE-2026-46172
Description
In the Linux kernel, the following vulnerability has been resolved:
ipv6: xfrm6: release dst on error in xfrm6_rcv_encap()
xfrm6_rcv_encap() performs an IPv6 route lookup when the skb does not already have a dst attached. ip6_route_input_lookup() returns a referenced dst entry even when the lookup resolves to an error route.
If dst->error is set, xfrm6_rcv_encap() drops the skb without attaching the dst to the skb and without releasing the reference returned by the lookup. Repeated packets hitting this path therefore leak dst entries.
Release the dst before jumping to the drop path.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
20- osv-coords15 versionspkg:rpm/opensuse/dtb-aarch64&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-64kb&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-kvmsmall&distro=openSUSE%20Leap%2016.0pkg:linux/kernelpkg:rpm/opensuse/kernel-azure&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-default&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-docs&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-obs-build&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-obs-qa&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-rt&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/kernel-default-base&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-zfcpdump&distro=openSUSE%20Leap%2016.0
< 6.12.0-160000.36.1+ 14 more
- (no CPE)range: < 6.12.0-160000.36.1
- (no CPE)range: < 6.12.0-160000.36.1
- (no CPE)range: < 6.12.0-160000.36.1
- (no CPE)range: >= 5.8.0, < 5.10.258
- (no CPE)range: < 6.12.0-160000.36.1
- (no CPE)range: < 6.12.0-160000.36.1
- (no CPE)range: < 6.12.0-160000.36.1
- (no CPE)range: < 6.12.0-160000.36.1
- (no CPE)range: < 6.12.0-160000.36.1
- (no CPE)range: < 6.12.0-160000.36.1
- (no CPE)range: < 6.12.0-160000.36.1
- (no CPE)range: < 7.0.11-1.1
- (no CPE)range: < 6.12.0-160000.36.1.160000.2.17
- (no CPE)range: < 6.12.0-160000.36.1
- (no CPE)range: < 6.12.0-160000.36.1
Patches
Vulnerability mechanics
References
11- git.kernel.org/stable/c/554c9b090c8ac5b1c5c507f4badf8d5d0c9c6e13nvdPatch
- git.kernel.org/stable/c/6a5eec0a2a0e99ec9743cf8f1c4082178811d90anvdPatch
- git.kernel.org/stable/c/870560015ce6e0d8f841c6a8aba33c44be52c727nvdPatch
- git.kernel.org/stable/c/9d5047782f9bd2829e529df69209bf3232eb561fnvdPatch
- git.kernel.org/stable/c/a0721bcd72641c32b281f227a94505b31cf54117nvdPatch
- git.kernel.org/stable/c/a20b34f6e854fe6f2aa82528fae7a88759919eb4nvdPatch
- git.kernel.org/stable/c/bc0fcb9823cd0894934cf968b525c575833d7078nvdPatch
- git.kernel.org/stable/c/c2efc4956981066df2fef1cc77391b523db6d8e4nvdPatch
- cert-portal.siemens.com/productcert/html/ssa-019113.htmlnvd
- cert-portal.siemens.com/productcert/html/ssa-457936.htmlnvd
- cert-portal.siemens.com/productcert/html/ssa-784472.htmlnvd
News mentions
2- Siemens SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFPCISA ICS Advisories
- Siemens SIMATIC S7-1500 TM MFPCISA ICS Advisories