CVE-2026-99088

Что произошло

In the Linux kernel, the following vulnerability has been resolved: net: openvswitch: validate transport header presence in set_ipv6_addr When executing IPv6 address rewrite actions on IPv6 fragments, set_ipv6_addr() calls update_ipv6_checksum(). If parse_ipv6hdr() processes a non-first IPv6 fragment, it sets key->ip.proto to NEXTHDR_FRAGMENT and returns early without calling skb_set_transport_header(). update_ipv6_checksum() unconditionally evaluates skb_transport_offset() on entry before checking l4_proto. Because skb->transport_header is uninitialized, this triggers a warning under CONFIG_DEBUG_NET=y although it is completely harmless. Fix this by returning early in update_ipv6_checksum() if l4_proto is NEXTHDR_FRAGMENT. This avoids reading the uninitialized transport offset for fragments while preserving the debug warning for any other protocol where the transport header is unexpectedly missing. See the syzbot trace: !skb_transport_header_was_set(skb) WARNING: ./include/linux/skbuff.h:3075 at skb_transport_header include/linux/skbuff.h:3075 [inline], CPU#1: syz-executor463/5635 WARNING: ./include/linux/skbuff.h:3075 at skb_transport_offset include/linux/skbuff.h:3250 [inline], CPU#1: syz-executor463/5635 WARNING: ./include/linux/skbuff.h:3075 at update_ipv6_checksum net/openvswitch/actions.c:361 [inline], CPU#1: syz-executor463/5635 WARNING: ./include/linux/skbuff.h:3075 at set_ipv6_addr+0x462/0x660 net/openvswitch/actions.c:399, CPU#1: syz-executor463/5635 [...] RIP: 0010:skb_transport_header include/linux/skbuff.h:3075 [inline] RIP: 0010:skb_transport_offset include/linux/skbuff.h:3250 [inline] RIP: 0010:update_ipv6_checksum net/openvswitch/actions.c:361 [inline] RIP: 0010:set_ipv6_addr+0x462/0x660 net/openvswitch/actions.c:399 [...] Call Trace: set_ipv6 net/openvswitch/actions.c:531 [inline] do_execute_actions+0x557e/0x8600 net/openvswitch/actions.c:1366 ovs_execute_actions+0xde/0x520 net/openvswitch/actions.c:1592 ovs_packet_cmd_execute+0xb4f/0xf10 net/openvswitch/datapath.c:705 genl_family_rcv_msg_doit+0x233/0x340 net/netlink/genetlink.c:1114 genl_rcv_msg+0x614/0x7a0 net/netlink/genetlink.c:1209 netlink_rcv_skb+0x226/0x4a0 net/netlink/af_netlink.c:2572 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1218 netlink_unicast+0x7bd/0x940 net/netlink/af_netlink.c:1361 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1916 sock_sendmsg_nosec+0x14e/0x190 net/socket.c:800

Что делать

dpkg-query -W -f='${Package}	${Version}\n'

rpm -qa --qf '%{NAME}\t%{VERSION}-%{RELEASE}\n'

Get-HotFix | Select-Object HotFixID, InstalledOn

Продукты и затронутые версии

{
  "status": "affected",
  "version": "3fdbd1ce11e5c0d7cafbe44c942c5cad61113d7b",
  "lessThan": "1efa6842e94aa70237446b31fbe2bc16586809c3",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "3fdbd1ce11e5c0d7cafbe44c942c5cad61113d7b",
  "lessThan": "ad4258db21e801a7aae614afca89a2e39283080d",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "3fdbd1ce11e5c0d7cafbe44c942c5cad61113d7b",
  "lessThan": "54cb98ed23866205926298621e04169f50665b59",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "3fdbd1ce11e5c0d7cafbe44c942c5cad61113d7b",
  "lessThan": "b7b80d204abdc258006f9e17c92b363ab13bb599",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "3fdbd1ce11e5c0d7cafbe44c942c5cad61113d7b",
  "lessThan": "6774af7cd17be8f0d0f70de3a749d381b4f2e9da",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "3fdbd1ce11e5c0d7cafbe44c942c5cad61113d7b",
  "lessThan": "2594795fd832f0253826d64ff8976b8ff5fbfe9f",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "3fdbd1ce11e5c0d7cafbe44c942c5cad61113d7b",
  "lessThan": "6b8897ba0733f88f0360ea48a970f373f9142de0",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "3fdbd1ce11e5c0d7cafbe44c942c5cad61113d7b",
  "lessThan": "3c6a4b11330fe424557538a98fca9f0a4c5bf313",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "3.8"
}

{
  "status": "unaffected",
  "version": "0",
  "lessThan": "3.8",
  "versionType": "semver"
}

{
  "status": "unaffected",
  "version": "5.10.273",
  "versionType": "semver",
  "lessThanOrEqual": "5.10.*"
}

{
  "status": "unaffected",
  "version": "5.15.224",
  "versionType": "semver",
  "lessThanOrEqual": "5.15.*"
}

{
  "status": "unaffected",
  "version": "6.1.191",
  "versionType": "semver",
  "lessThanOrEqual": "6.1.*"
}

{
  "status": "unaffected",
  "version": "6.6.160",
  "versionType": "semver",
  "lessThanOrEqual": "6.6.*"
}

{
  "status": "unaffected",
  "version": "6.12.113",
  "versionType": "semver",
  "lessThanOrEqual": "6.12.*"
}

{
  "status": "unaffected",
  "version": "6.18.57",
  "versionType": "semver",
  "lessThanOrEqual": "6.18.*"
}

{
  "status": "unaffected",
  "version": "7.2.11",
  "versionType": "semver",
  "lessThanOrEqual": "7.2.*"
}

{
  "status": "unaffected",
  "version": "7.3",
  "versionType": "original_commit_for_fix",
  "lessThanOrEqual": "*"
}

CVSS: оценки и векторы

Оценка CVSS отсутствует.

Источники и ссылки

{
  "cwes": [],
  "epss": {
    "source": "epss",
    "received_at": "2026-11-01T21:13:22.711382+00:00"
  },
  "title": {
    "source": "cve",
    "received_at": "2026-10-30T12:57:41.987922+00:00"
  },
  "scores": [],
  "status": {
    "source": "cve",
    "received_at": "2026-10-30T12:57:41.987922+00:00"
  },
  "affected": [
    "cve"
  ],
  "published": {
    "source": "cve",
    "received_at": "2026-10-30T12:57:41.987922+00:00"
  },
  "solutions": [],
  "percentile": {
    "source": "epss",
    "received_at": "2026-11-01T21:13:22.711382+00:00"
  },
  "references": [
    "cve",
    "ghsa",
    "nvd"
  ],
  "description": {
    "source": "cve",
    "received_at": "2026-10-30T12:57:41.987922+00:00"
  },
  "workarounds": [],
  "configurations": []
}

Хронология записи

1. Данные обновлены02.11.2026, 00:13
2. Данные обновлены31.10.2026, 12:00
3. Данные обновлены30.10.2026, 15:58
4. Данные обновлены28.10.2026, 23:51
5. Данные обновлены28.10.2026, 18:07
6. Данные обновлены28.10.2026, 17:59
7. Опубликована28.10.2026, 15:17

Личная заметка и статус

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