Описание
Security update for openvswitch
This update for openvswitch fixes the following issues
- CVE-2026-5265: heap over-read in ICMP error response generation (bsc#1262498).
- CVE-2026-5367: heap over-read in OVN DHCPv6 client ID processing (bsc#1262499).
- CVE-2026-34956: Invalid memory access in conntrack FTP alg (bsc#1261273).
Changes for openvswitch:
- Update ovn to 25.03.3
- Bug fixes
- Add support for special port_security prefix "VRRPv3". This prefix allows CMS to allow all required traffic for a VRRPv3 virtual router behind LSP. See ovn-nb(5) man page for more details.
- Fixed support for fragmented traffic in the userspace datapath. Added the "acl_ct_translation" NB_Global option to enable connection tracking based L4 field translation for stateful ACLs. When enabled allows proper handling of IP fragmentation in userspace datapaths. This option may break hardware offloading and is disabled by default.
- Added disable_garp_rarp option to logical_router table in order to disable GARP/RARP announcements by all the peer ports of this logical router.
- Update openvswitch to 3.5.4
- Full changelog https://www.openvswitch.org/releases/NEWS-3.5.4.txt
- OVS validated with DPDK 24.11.4.
- Fixed buffer overflow during conntrack processing of alg=ftp in userspace datapath (CVE-2026-34956) (bsc#1261273).
- Update openvswitch to 3.5.3
- Full changelog https://www.openvswitch.org/releases/NEWS-3.5.3.txt
- Bug fixes
Список пакетов
openSUSE Leap 16.0
Ссылки
- SUSE Security Ratings
- SUSE Bug 1261273
- SUSE Bug 1262498
- SUSE Bug 1262499
- SUSE CVE CVE-2026-34956 page
- SUSE CVE CVE-2026-5265 page
- SUSE CVE CVE-2026-5367 page
Описание
A flaw was found in Open vSwitch. When Open vSwitch is configured with a conntrack flow using FTP helpers over the userspace datapath, a remote attacker can send a specially crafted FTP stream with an EPASV command exceeding 255 characters. This heap access error can lead to a crash, resulting in a Denial of Service (DoS) for the affected system.
Затронутые продукты
Ссылки
- CVE-2026-34956
- SUSE Bug 1261273
Описание
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.
Затронутые продукты
Ссылки
- CVE-2026-5265
- SUSE Bug 1262498
Описание
A flaw was found in OVN (Open Virtual Network). A remote attacker, by sending crafted DHCPv6 (Dynamic Host Configuration Protocol for IPv6) SOLICIT packets with an inflated Client ID length, could cause the ovn-controller to read beyond the bounds of a packet. This out-of-bounds read can lead to the disclosure of sensitive information stored in heap memory, which is then returned to the attacker's virtual machine port.
Затронутые продукты
Ссылки
- CVE-2026-5367
- SUSE Bug 1262499