CVE-2026-99079

Что произошло

In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Prevent stale XSK buffer release on refill retry When an XDP redirect to an AF_XDP socket fails because its RX ring is full, the XSK core frees the buffer. During the subsequent batched refill of a legacy cyclic RQ, mlx5e also releases the WQE's XSK buffer before allocating a replacement. If that refill succeeds only partially, a WQE left without a replacement retains its old buffer pointer. The buffer can meanwhile be allocated to another WQE. A later refill retry can then free the live buffer through the stale pointer and publish the same UMEM frame twice. Mark the WQE as released immediately after the driver-side free. The flag is already cleared when a replacement buffer is assigned, so refill retries no longer release stale pointers. The failure is silent and produces no kernel warning or splat. A standalone legacy cyclic-RQ zero-copy libxsk reproducer, using 64-byte UDP traffic offered at 12 Mpps, detected it: stock stopped after 2,854,914 packets in 4.094 seconds, with 4,542 xdp_rx_ring_full events and 64 ownership/double-publication errors. With this change it processed 356,904,225 packets in 30 seconds despite 571,405 xdp_rx_ring_full events, with no ownership or data errors.

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": "3f93f82988bc6b4104314bf9aa485d47fbb7e241",
  "lessThan": "32bbb870078d467479965c21bbc4960c57eea208",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "3f93f82988bc6b4104314bf9aa485d47fbb7e241",
  "lessThan": "34d1db2b18e1c1d189e34dd51923e031815f88e3",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "3f93f82988bc6b4104314bf9aa485d47fbb7e241",
  "lessThan": "639522e5056cade578a324acfa993ec6c9f7f5dc",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "3f93f82988bc6b4104314bf9aa485d47fbb7e241",
  "lessThan": "655f47477054d19de3b138840be229a1a4490d0c",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "3f93f82988bc6b4104314bf9aa485d47fbb7e241",
  "lessThan": "e01620844c5c88b6fcf819d171df8e3976a0e76f",
  "versionType": "git"
}

{
  "status": "affected",
  "version": "6.4"
}

{
  "status": "unaffected",
  "version": "0",
  "lessThan": "6.4",
  "versionType": "semver"
}

{
  "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

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

Источники и ссылки

{
  "cwes": [],
  "epss": {
    "source": "epss",
    "received_at": "2026-11-01T21:13:22.710461+00:00"
  },
  "title": {
    "source": "cve",
    "received_at": "2026-10-28T20:51:05.224050+00:00"
  },
  "scores": [
    "cve"
  ],
  "status": {
    "source": "cve",
    "received_at": "2026-10-28T20:51:05.224050+00:00"
  },
  "affected": [
    "cve"
  ],
  "published": {
    "source": "cve",
    "received_at": "2026-10-28T20:51:05.224050+00:00"
  },
  "solutions": [],
  "percentile": {
    "source": "epss",
    "received_at": "2026-11-01T21:13:22.710461+00:00"
  },
  "references": [
    "cve"
  ],
  "description": {
    "source": "cve",
    "received_at": "2026-10-28T20:51:05.224050+00:00"
  },
  "workarounds": [],
  "configurations": []
}

Хронология записи

1. Данные обновлены02.11.2026, 00:13
2. Данные обновлены31.10.2026, 12:00
3. Данные обновлены29.10.2026, 12:47
4. Опубликована28.10.2026, 23:51

Личная заметка и статус

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