{"cve":"CVE-2022-49687","nvd":{"published":"2025-02-26T07:01:43.527","modified":"2026-06-17T05:18:52.040","status":"Analyzed","description":"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  # 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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","score":7.1},"cwes":[],"references":["https://git.kernel.org/stable/c/340fbdc8011f2dc678f622c5ce1cbb5ab8305de7","https://git.kernel.org/stable/c/57ee40f1b198b59d43c216fbc4672f9300d3c8b0","https://git.kernel.org/stable/c/8af52fe9fd3bf5e7478da99193c0632276e1dfce","https://git.kernel.org/stable/c/8c7a32b7c15555beddc5810c3334d9cefff061bf","https://git.kernel.org/stable/c/8d7fe9ad6fddc2af8bde4b921b4f8fab231ed38c"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:59:48.811064707+00:00"},"epss":{"cve":"CVE-2022-49687","score":0.00289,"percentile":0.21503,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}