Medium severity6.5NVD Advisory· Published Apr 24, 2026· Updated Jun 1, 2026
CVE-2026-5265
CVE-2026-5265
Description
When generating an ICMP Destination Unreachable or Packet Too Big response, the handler copies a portion of the original packet into the ICMP error body using the IP header's self-declared total length (ip_tot_len for IPv4, ip6_plen for IPv6) without validating it against the actual packet buffer size. A VM can send a short packet with an inflated IP length field that triggers an ICMP error (e.g., by hitting a reject ACL), causing ovn-controller to read heap memory beyond the valid packet data and include it in the ICMP response sent back to the VM.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
22- osv-coords21 versionspkg:rpm/opensuse/openvswitch&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/openvswitch&distro=openSUSE%20Tumbleweedpkg:rpm/suse/openvswitch3&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-ESPOSpkg:rpm/suse/openvswitch3&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-LTSSpkg:rpm/suse/openvswitch3&distro=SUSE%20Linux%20Enterprise%20Micro%205.5pkg:rpm/suse/openvswitch3&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP5-LTSSpkg:rpm/suse/openvswitch3&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP5pkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-ESPOSpkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-LTSSpkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Package%20Hub%2015%20SP7pkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Server%20Applications%2015%20SP7pkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP4-LTSSpkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP5-LTSSpkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP6-LTSSpkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP4pkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP5pkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP6pkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/openvswitch&distro=SUSE%20Linux%20Micro%206.2
< 3.5.4-160000.4.1+ 20 more
- (no CPE)range: < 3.5.4-160000.4.1
- (no CPE)range: < 3.7.1-34.1
- (no CPE)range: < 3.1.7-150500.3.31.1
- (no CPE)range: < 3.1.7-150500.3.31.1
- (no CPE)range: < 3.1.7-150500.3.31.1
- (no CPE)range: < 3.1.7-150500.3.31.1
- (no CPE)range: < 3.1.7-150500.3.31.1
- (no CPE)range: < 2.14.2-150400.24.35.1
- (no CPE)range: < 2.14.2-150400.24.35.1
- (no CPE)range: < 3.5.4-150700.41.18.1
- (no CPE)range: < 3.5.4-150700.41.18.1
- (no CPE)range: < 2.14.2-150400.24.35.1
- (no CPE)range: < 2.14.2-150400.24.35.1
- (no CPE)range: < 3.1.7-150600.33.15.1
- (no CPE)range: < 3.5.4-160000.4.1
- (no CPE)range: < 2.14.2-150400.24.35.1
- (no CPE)range: < 2.14.2-150400.24.35.1
- (no CPE)range: < 3.1.7-150600.33.15.1
- (no CPE)range: < 3.5.4-160000.4.1
- (no CPE)range: < 3.1.7-6.1
- (no CPE)range: < 3.5.4-160000.4.1
Patches
Vulnerability mechanics
References
13- www.openwall.com/lists/oss-security/2026/04/20/2nvd
- www.openwall.com/lists/oss-security/2026/04/20/4nvd
- access.redhat.com/errata/RHSA-2026:11694nvd
- access.redhat.com/errata/RHSA-2026:11695nvd
- access.redhat.com/errata/RHSA-2026:11696nvd
- access.redhat.com/errata/RHSA-2026:11698nvd
- access.redhat.com/errata/RHSA-2026:11700nvd
- access.redhat.com/errata/RHSA-2026:11701nvd
- access.redhat.com/errata/RHSA-2026:11702nvd
- access.redhat.com/errata/RHSA-2026:22110nvd
- access.redhat.com/errata/RHSA-2026:22111nvd
- access.redhat.com/security/cve/CVE-2026-5265nvd
- bugzilla.redhat.com/show_bug.cginvd
News mentions
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