{"id":"CVE-2022-49687","title":"virtio_net: fix xdp_rxq_info bug after suspend/resume","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nvirtio_net: fix xdp_rxq_info bug after suspend/resume\n\nThe following sequence currently causes a driver bug warning\nwhen using virtio_net:\n\n  # ip link set eth0 up\n  # …","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 754b8a21a96d5f11712245aef907149606b323ae < 9222672fa6370f0ec3d899662cb8680e9282fc4c","Linux >= 754b8a21a96d5f11712245aef907149606b323ae < 8c7a32b7c15555beddc5810c3334d9cefff061bf","Linux >= 754b8a21a96d5f11712245aef907149606b323ae < 340fbdc8011f2dc678f622c5ce1cbb5ab8305de7","Linux >= 754b8a21a96d5f11712245aef907149606b323ae < 8d7fe9ad6fddc2af8bde4b921b4f8fab231ed38c","Linux >= 754b8a21a96d5f11712245aef907149606b323ae < 57ee40f1b198b59d43c216fbc4672f9300d3c8b0","Linux >= 754b8a21a96d5f11712245aef907149606b323ae < 8af52fe9fd3bf5e7478da99193c0632276e1dfce","Linux 4.16"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T19:46:47.424784Z"},"published":"2025-02-26","updated":"2026-11-05","sourceUpdated":"2026-11-05T19:49:41.990Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2022-49687","references":[{"url":"https://git.kernel.org/stable/c/9222672fa6370f0ec3d899662cb8680e9282fc4c"},{"url":"https://git.kernel.org/stable/c/8c7a32b7c15555beddc5810c3334d9cefff061bf"},{"url":"https://git.kernel.org/stable/c/340fbdc8011f2dc678f622c5ce1cbb5ab8305de7"},{"url":"https://git.kernel.org/stable/c/8d7fe9ad6fddc2af8bde4b921b4f8fab231ed38c"},{"url":"https://git.kernel.org/stable/c/57ee40f1b198b59d43c216fbc4672f9300d3c8b0"},{"url":"https://git.kernel.org/stable/c/8af52fe9fd3bf5e7478da99193c0632276e1dfce"}],"tags":["cve.org"],"epss":0.00289,"epssPercentile":0.21608,"ingestedAt":"2026-11-05T22:38:31.584Z","slug":"CVE-2022-49687","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nvirtio_net: fix xdp_rxq_info bug after suspend/resume\n\nThe following sequence currently causes a driver bug warning\nwhen using virtio_net:\n\n  # ip link set eth0 up\n  # echo mem > /sys/power/state (or e.g. # rtcwake -s 10 -m mem)\n  <resume>\n  # ip link set eth0 down\n\n  Missing register, driver bug\n  WARNING: CPU: 0 PID: 375 at net/core/xdp.c:138 xdp_rxq_info_unreg+0x58/0x60\n  Call trace:\n   xdp_rxq_info_unreg+0x58/0x60\n   virtnet_close+0x58/0xac\n   __dev_close_many+0xac/0x140\n   __dev_change_flags+0xd8/0x210\n   dev_change_flags+0x24/0x64\n   do_setlink+0x230/0xdd0\n   ...\n\nThis happens because virtnet_freeze() frees the receive_queue\ncompletely (including struct xdp_rxq_info) but does not call\nxdp_rxq_info_unreg(). 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.\n\n## Affected\n\n- `Linux >= 754b8a21a96d5f11712245aef907149606b323ae < 9222672fa6370f0ec3d899662cb8680e9282fc4c`\n- `Linux >= 754b8a21a96d5f11712245aef907149606b323ae < 8c7a32b7c15555beddc5810c3334d9cefff061bf`\n- `Linux >= 754b8a21a96d5f11712245aef907149606b323ae < 340fbdc8011f2dc678f622c5ce1cbb5ab8305de7`\n- `Linux >= 754b8a21a96d5f11712245aef907149606b323ae < 8d7fe9ad6fddc2af8bde4b921b4f8fab231ed38c`\n- `Linux >= 754b8a21a96d5f11712245aef907149606b323ae < 57ee40f1b198b59d43c216fbc4672f9300d3c8b0`\n- `Linux >= 754b8a21a96d5f11712245aef907149606b323ae < 8af52fe9fd3bf5e7478da99193c0632276e1dfce`\n- `Linux 4.16`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}