CVE-2026-98398

Что произошло

In the Linux kernel, the following vulnerability has been resolved: locking/lockdep: Invalidate stale class_cache entries for zapped classes syzbot reported a lockdep splat hitting DEBUG_LOCKS_WARN_ON(1) in hlock_class() due to an invalid class_idx: WARNING: kernel/locking/lockdep.c:238 at __lock_acquire+0x382/0x2cf0 kernel/locking/lockdep.c:5203 Workqueue: wg-crypt-wg0 wg_packet_tx_worker RIP: 0010:hlock_class kernel/locking/lockdep.c:238 [inline] RIP: 0010:check_wait_context kernel/locking/lockdep.c:4870 [inline] RIP: 0010:__lock_acquire+0x389/0x2cf0 kernel/locking/lockdep.c:5203 Call Trace: lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5886 _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:173 tcp_tsq_handler+0x29/0x200 net/ipv4/tcp_output.c:1291 tcp_tsq_workfn+0x384/0x410 net/ipv4/tcp_output.c:1325 ... When a lock class is zapped (e.g. during module unload or key unregistration), zap_class() clears the class's bit in lock_classes_in_use and removes it from the class hash table. However, existing lockdep_map instances embedded in data structures may still retain a pointer to the zapped class in their class_cache[] array. When __lock_acquire() subsequently runs on such a lock, it finds lock->class_cache[subclass] != NULL, skipping register_lock_class() and assigning hlock->class_idx to the index of the zapped class. When check_wait_context() or hlock_class() inspects the held_lock, it finds !test_bit(class_idx, lock_classes_in_use) and warns. Furthermore, if the zapped slot is subsequently re-allocated to an unrelated lock key, the stale class_cache entry would erroneously match the unrelated class (ABA issue). Add lock_class_cache_is_valid() to validate that the cached class is within lock_classes bounds, still allocated in lock_classes_in_use (using uninstrumented arch_test_bit() in __always_inline context so it is safe in noinstr contexts like match_held_lock()), and that class->key matches the expected subkey (taking lockdep_set_subclass() overrides into account). Also use READ_ONCE()/WRITE_ONCE() when accessing class_cache[]. If the entry is invalid or stale, fall back to register_lock_class() / look_up_lock_class().

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": "a0b0fd53e1e67639b303b15939b9c653dbe7a8c4",
  "lessThan": "f8a1281ab82df5b51fd0384354d4b21daf2b7af0",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "a0b0fd53e1e67639b303b15939b9c653dbe7a8c4",
  "lessThan": "1c9d664e2e067fca69e5a41d68e23bbc66a583fe",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "a0b0fd53e1e67639b303b15939b9c653dbe7a8c4",
  "lessThan": "6bc345f6d81ebe22e0f355c2a21d7e29691f9332",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "a0b0fd53e1e67639b303b15939b9c653dbe7a8c4",
  "lessThan": "f63c86e9d267629758adaba18579e784ddd63c32",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "a0b0fd53e1e67639b303b15939b9c653dbe7a8c4",
  "lessThan": "c7acfb04c7e2e2dea248282b21373d93296644dd",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "a0b0fd53e1e67639b303b15939b9c653dbe7a8c4",
  "lessThan": "baa320fbb2f9fea50f5632a307da8ce84fbef5bd",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "a0b0fd53e1e67639b303b15939b9c653dbe7a8c4",
  "lessThan": "02c6be7d675b21d81f0ba3a524346850a8c0e3bf",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "5.1"
}

{
  "status": "unaffected",
  "version": "0",
  "lessThan": "5.1",
  "versionType": "semver"
}

{
  "status": "unaffected",
  "version": "5.15.222",
  "versionType": "semver",
  "lessThanOrEqual": "5.15.*"
}

{
  "status": "unaffected",
  "version": "6.1.189",
  "versionType": "semver",
  "lessThanOrEqual": "6.1.*"
}

{
  "status": "unaffected",
  "version": "6.6.158",
  "versionType": "semver",
  "lessThanOrEqual": "6.6.*"
}

{
  "status": "unaffected",
  "version": "6.12.111",
  "versionType": "semver",
  "lessThanOrEqual": "6.12.*"
}

{
  "status": "unaffected",
  "version": "6.18.53",
  "versionType": "semver",
  "lessThanOrEqual": "6.18.*"
}

{
  "status": "unaffected",
  "version": "7.2.7",
  "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": "2026-11-03T21:16:05.845576+00:00"
  },
  "title": {
    "source": "cve",
    "received_at": "2026-10-28T20:15:08.304099+00:00"
  },
  "scores": [],
  "status": {
    "source": "cve",
    "received_at": "2026-10-28T20:15:08.304099+00:00"
  },
  "affected": [
    "cve"
  ],
  "published": {
    "source": "cve",
    "received_at": "2026-10-28T20:15:08.304099+00:00"
  },
  "solutions": [],
  "percentile": {
    "source": "epss",
    "received_at": "2026-11-03T21:16:05.845576+00:00"
  },
  "references": [
    "cve"
  ],
  "description": {
    "source": "cve",
    "received_at": "2026-10-28T20:15:08.304099+00:00"
  },
  "workarounds": [],
  "configurations": []
}

Хронология записи

1. Данные обновлены04.11.2026, 00:16
2. Данные обновлены03.11.2026, 00:15
3. Данные обновлены02.11.2026, 00:13
4. Данные обновлены31.10.2026, 12:00
5. Данные обновлены29.10.2026, 12:47
6. Опубликована28.10.2026, 23:15

Личная заметка и статус

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