{"cve":"CVE-2024-43835","nvd":{"published":"2024-08-17T10:15:09.183","modified":"2026-06-17T07:51:48.363","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nvirtio_net: Fix napi_skb_cache_put warning\n\nAfter the commit bdacf3e34945 (\"net: Use nested-BH locking for\nnapi_alloc_cache.\") was merged, the following warning began to appear:\n\n\t WARNING: CPU: 5 PID: 1 at net/core/skbuff.c:1451 napi_skb_cache_put+0x82/0x4b0\n\n\t  __warn+0x12f/0x340\n\t  napi_skb_cache_put+0x82/0x4b0\n\t  napi_skb_cache_put+0x82/0x4b0\n\t  report_bug+0x165/0x370\n\t  handle_bug+0x3d/0x80\n\t  exc_invalid_op+0x1a/0x50\n\t  asm_exc_invalid_op+0x1a/0x20\n\t  __free_old_xmit+0x1c8/0x510\n\t  napi_skb_cache_put+0x82/0x4b0\n\t  __free_old_xmit+0x1c8/0x510\n\t  __free_old_xmit+0x1c8/0x510\n\t  __pfx___free_old_xmit+0x10/0x10\n\nThe issue arises because virtio is assuming it's running in NAPI context\neven when it's not, such as in the netpoll case.\n\nTo resolve this, modify virtnet_poll_tx() to only set NAPI when budget\nis available. Same for virtnet_poll_cleantx(), which always assumed that\nit was in a NAPI context.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/468a729b78895893d0e580ceea49bed8ada2a2bd","https://git.kernel.org/stable/c/6b5325f2457521bbece29499970c0117a648c620","https://git.kernel.org/stable/c/842a97b5e44f0c8a9fc356fe976e0e13ddcf7783","https://git.kernel.org/stable/c/cc7340f18e45886121c131227985d64ef666012f","https://git.kernel.org/stable/c/d3af435e8ace119e58d8e21d3d2d6a4e7c4a4baa"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:54:16.205165117+00:00"},"epss":{"cve":"CVE-2024-43835","score":0.0025,"percentile":0.1637,"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."]}