CVE-2026-98230

Что произошло

In the Linux kernel, the following vulnerability has been resolved: xfrm: use hlist_del_init_rcu for state_cache and state_cache_input Commit 14acf9652e56 ("xfrm: defensively unhash xfrm_state lists in __xfrm_state_delete") converted bydst/bysrc/byseq/byspi from hlist_del_rcu() to hlist_del_init_rcu() so that a second __xfrm_state_delete() on the same object becomes a no-op rather than a write through LIST_POISON pprev. It missed state_cache and state_cache_input, which kept hlist_del_rcu(): - hlist_del_rcu() leaves pprev = LIST_POISON2 (non-NULL), so hlist_unhashed() returns false. - hlist_del_init_rcu() leaves pprev = NULL, so hlist_unhashed() returns true. A second __xfrm_state_delete() therefore enters __hlist_del() on the already-deleted state_cache/state_cache_input nodes and does WRITE_ONCE(*pprev, next) through LIST_POISON2 — a write use-after-free once the slab is reused. The corruption can in turn cause a subsequent hlist_for_each_entry_rcu traversal to follow a dangling next pointer, producing the read use-after-free reported in xfrm_input_state_lookup(). Switch state_cache and state_cache_input to hlist_del_init_rcu() to match the other four lists, closing the write use-after-free and, with it, the read use-after-free it spawns.

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": "aa48a18fdb0911572d133057cd579db704b87da4",
  "lessThan": "fb38fb7420d5f7192f9e2b6ac835ede149cd7ac5",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "0045e3d80613cc7174dc15f189ee6fc4e73b9365",
  "lessThan": "4748c27e2e6a1969e02f1df46e62f79d2799b80b",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "0045e3d80613cc7174dc15f189ee6fc4e73b9365",
  "lessThan": "9b74a47a4cbd0d29faff4f3b199212c73e6b6220",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "0045e3d80613cc7174dc15f189ee6fc4e73b9365",
  "lessThan": "2afb8dc1f4390f164db8352f8e685e126e9db566",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "5e4334dc39443645415450163ff5ff1ee7e79784",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "6.12.13",
  "lessThan": "6.12.112",
  "versionType": "semver"
}

{
  "status": "affected",
  "version": "6.13"
}

{
  "status": "unaffected",
  "version": "0",
  "lessThan": "6.13",
  "versionType": "semver"
}

{
  "status": "unaffected",
  "version": "6.12.112",
  "versionType": "semver",
  "lessThanOrEqual": "6.12.*"
}

{
  "status": "unaffected",
  "version": "6.18.54",
  "versionType": "semver",
  "lessThanOrEqual": "6.18.*"
}

{
  "status": "unaffected",
  "version": "7.2.8",
  "versionType": "semver",
  "lessThanOrEqual": "7.2.*"
}

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

CVSS: оценки и векторы

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Источники и ссылки

{
  "cwes": [],
  "epss": {
    "source": "epss",
    "received_at": "2026-11-02T21:15:46.190340+00:00"
  },
  "title": {
    "source": "cve",
    "received_at": "2026-10-28T20:15:08.251245+00:00"
  },
  "scores": [
    "cve"
  ],
  "status": {
    "source": "cve",
    "received_at": "2026-10-28T20:15:08.251245+00:00"
  },
  "affected": [
    "cve"
  ],
  "published": {
    "source": "cve",
    "received_at": "2026-10-28T20:15:08.251245+00:00"
  },
  "solutions": [],
  "percentile": {
    "source": "epss",
    "received_at": "2026-11-02T21:15:46.190340+00:00"
  },
  "references": [
    "cve"
  ],
  "description": {
    "source": "cve",
    "received_at": "2026-10-28T20:15:08.251245+00:00"
  },
  "workarounds": [],
  "configurations": []
}

Хронология записи

1. Данные обновлены03.11.2026, 00:15
2. Данные обновлены02.11.2026, 00:13
3. Данные обновлены31.10.2026, 12:00
4. Данные обновлены29.10.2026, 12:47
5. Опубликована28.10.2026, 23:15

Личная заметка и статус

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