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CVE-2022-49687 (GCVE-0-2022-49687)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:24 – Updated: 2026-05-11 19:04
VLAI
Title
virtio_net: fix xdp_rxq_info bug after suspend/resume
Summary
In the Linux kernel, the following vulnerability has been resolved: virtio_net: fix xdp_rxq_info bug after suspend/resume The following sequence currently causes a driver bug warning when using virtio_net: # ip link set eth0 up # echo mem > /sys/power/state (or e.g. # rtcwake -s 10 -m mem) <resume> # ip link set eth0 down Missing register, driver bug WARNING: CPU: 0 PID: 375 at net/core/xdp.c:138 xdp_rxq_info_unreg+0x58/0x60 Call trace: xdp_rxq_info_unreg+0x58/0x60 virtnet_close+0x58/0xac __dev_close_many+0xac/0x140 __dev_change_flags+0xd8/0x210 dev_change_flags+0x24/0x64 do_setlink+0x230/0xdd0 ... This happens because virtnet_freeze() frees the receive_queue completely (including struct xdp_rxq_info) but does not call xdp_rxq_info_unreg(). Similarly, virtnet_restore() sets up the receive_queue again but does not call xdp_rxq_info_reg(). Actually, parts of virtnet_freeze_down() and virtnet_restore_up() are almost identical to virtnet_close() and virtnet_open(): only the calls to xdp_rxq_info_(un)reg() are missing. This means that we can fix this easily and avoid such problems in the future by just calling virtnet_close()/open() from the freeze/restore handlers. Aside from adding the missing xdp_rxq_info calls the only difference is that the refill work is only cancelled if netif_running(). However, this should not make any functional difference since the refill work should only be active if the network interface is actually up.
Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 754b8a21a96d5f11712245aef907149606b323ae , < 9222672fa6370f0ec3d899662cb8680e9282fc4c (git)
Affected: 754b8a21a96d5f11712245aef907149606b323ae , < 8c7a32b7c15555beddc5810c3334d9cefff061bf (git)
Affected: 754b8a21a96d5f11712245aef907149606b323ae , < 340fbdc8011f2dc678f622c5ce1cbb5ab8305de7 (git)
Affected: 754b8a21a96d5f11712245aef907149606b323ae , < 8d7fe9ad6fddc2af8bde4b921b4f8fab231ed38c (git)
Affected: 754b8a21a96d5f11712245aef907149606b323ae , < 57ee40f1b198b59d43c216fbc4672f9300d3c8b0 (git)
Affected: 754b8a21a96d5f11712245aef907149606b323ae , < 8af52fe9fd3bf5e7478da99193c0632276e1dfce (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.16
Unaffected: 0 , < 4.16 (semver)
Unaffected: 4.19.250 , ≤ 4.19.* (semver)
Unaffected: 5.4.202 , ≤ 5.4.* (semver)
Unaffected: 5.10.127 , ≤ 5.10.* (semver)
Unaffected: 5.15.51 , ≤ 5.15.* (semver)
Unaffected: 5.18.8 , ≤ 5.18.* (semver)
Unaffected: 5.19 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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Similarly, virtnet_restore() sets up the\\nreceive_queue again but does not call xdp_rxq_info_reg().\\n\\nActually, parts of virtnet_freeze_down() and virtnet_restore_up()\\nare almost identical to virtnet_close() and virtnet_open(): only\\nthe calls to xdp_rxq_info_(un)reg() are missing. This means that\\nwe can fix this easily and avoid such problems in the future by\\njust calling virtnet_close()/open() from the freeze/restore handlers.\\n\\nAside from adding the missing xdp_rxq_info calls the only difference\\nis that the refill work is only cancelled if netif_running(). However,\\nthis should not make any functional difference since the refill work\\nshould only be active if the network interface is actually up.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: virtio_net: correcci\u00f3n del error xdp_rxq_info despu\u00e9s de suspender/reanudar La siguiente secuencia actualmente provoca una advertencia de error del controlador al usar virtio_net: # ip link set eth0 up # echo mem \u0026gt; /sys/power/state (or e.g. # rtcwake -s 10 -m mem)  # ip link set eth0 down Missing register, driver bug WARNING: CPU: 0 PID: 375 at net/core/xdp.c:138 xdp_rxq_info_unreg+0x58/0x60 Call trace: xdp_rxq_info_unreg+0x58/0x60 virtnet_close+0x58/0xac __dev_close_many+0xac/0x140 __dev_change_flags+0xd8/0x210 dev_change_flags+0x24/0x64 do_setlink+0x230/0xdd0 ... This happens because virtnet_freeze() frees the receive_queue completely (including struct xdp_rxq_info) but does not call xdp_rxq_info_unreg(). 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-10T15:18:14+00:00",
      "cve": "CVE-2022-49687",
      "id": "CVE-2022-49687",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_affected": "198",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: virtio_net: fix xdp_rxq_info bug after suspend/resume",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49687.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.