{"id":"CVE-2024-43835","state":"PUBLISHED","title":"virtio_net: Fix napi_skb_cache_put warning","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.","publishedAt":"2024-08-17T09:21:52.425Z","updatedAt":"2026-05-11T20:30:44.066Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"df133f3f96257ee29696c0ed8bd198ec801dc810","status":"affected","lessThan":"d3af435e8ace119e58d8e21d3d2d6a4e7c4a4baa","versionType":"git"},{"version":"df133f3f96257ee29696c0ed8bd198ec801dc810","status":"affected","lessThan":"842a97b5e44f0c8a9fc356fe976e0e13ddcf7783","versionType":"git"},{"version":"df133f3f96257ee29696c0ed8bd198ec801dc810","status":"affected","lessThan":"cc7340f18e45886121c131227985d64ef666012f","versionType":"git"},{"version":"df133f3f96257ee29696c0ed8bd198ec801dc810","status":"affected","lessThan":"6b5325f2457521bbece29499970c0117a648c620","versionType":"git"},{"version":"df133f3f96257ee29696c0ed8bd198ec801dc810","status":"affected","lessThan":"f5e9a22d19bb98a7e86034db85eb295e94187caa","versionType":"git"},{"version":"df133f3f96257ee29696c0ed8bd198ec801dc810","status":"affected","lessThan":"468a729b78895893d0e580ceea49bed8ada2a2bd","versionType":"git"},{"version":"df133f3f96257ee29696c0ed8bd198ec801dc810","status":"affected","lessThan":"f8321fa75102246d7415a6af441872f6637c93ab","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/virtio_net.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.0","versionType":"semver"},{"version":"5.4.284","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.226","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.167","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.109","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.50","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.10.3","status":"unaffected","lessThanOrEqual":"6.10.*","versionType":"semver"},{"version":"6.11","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/virtio_net.c"]}],"references":["https://git.kernel.org/stable/c/d3af435e8ace119e58d8e21d3d2d6a4e7c4a4baa","https://git.kernel.org/stable/c/842a97b5e44f0c8a9fc356fe976e0e13ddcf7783","https://git.kernel.org/stable/c/cc7340f18e45886121c131227985d64ef666012f","https://git.kernel.org/stable/c/6b5325f2457521bbece29499970c0117a648c620","https://git.kernel.org/stable/c/f5e9a22d19bb98a7e86034db85eb295e94187caa","https://git.kernel.org/stable/c/468a729b78895893d0e580ceea49bed8ada2a2bd","https://git.kernel.org/stable/c/f8321fa75102246d7415a6af441872f6637c93ab","https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html","https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:07:47.831Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2024/43xxx/CVE-2024-43835.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-43835","state":"PUBLISHED","datePublished":"2024-08-17T09:21:52.425Z","dateUpdated":"2026-05-11T20:30:44.066Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-08-17T09:11:59.274Z"},"containers":{"cna":{"title":"virtio_net: Fix napi_skb_cache_put warning","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"df133f3f96257ee29696c0ed8bd198ec801dc810","status":"affected","lessThan":"d3af435e8ace119e58d8e21d3d2d6a4e7c4a4baa","versionType":"git"},{"version":"df133f3f96257ee29696c0ed8bd198ec801dc810","status":"affected","lessThan":"842a97b5e44f0c8a9fc356fe976e0e13ddcf7783","versionType":"git"},{"version":"df133f3f96257ee29696c0ed8bd198ec801dc810","status":"affected","lessThan":"cc7340f18e45886121c131227985d64ef666012f","versionType":"git"},{"version":"df133f3f96257ee29696c0ed8bd198ec801dc810","status":"affected","lessThan":"6b5325f2457521bbece29499970c0117a648c620","versionType":"git"},{"version":"df133f3f96257ee29696c0ed8bd198ec801dc810","status":"affected","lessThan":"f5e9a22d19bb98a7e86034db85eb295e94187caa","versionType":"git"},{"version":"df133f3f96257ee29696c0ed8bd198ec801dc810","status":"affected","lessThan":"468a729b78895893d0e580ceea49bed8ada2a2bd","versionType":"git"},{"version":"df133f3f96257ee29696c0ed8bd198ec801dc810","status":"affected","lessThan":"f8321fa75102246d7415a6af441872f6637c93ab","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/virtio_net.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.0","versionType":"semver"},{"version":"5.4.284","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.226","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.167","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.109","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.50","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.10.3","status":"unaffected","lessThanOrEqual":"6.10.*","versionType":"semver"},{"version":"6.11","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/virtio_net.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/d3af435e8ace119e58d8e21d3d2d6a4e7c4a4baa"},{"url":"https://git.kernel.org/stable/c/842a97b5e44f0c8a9fc356fe976e0e13ddcf7783"},{"url":"https://git.kernel.org/stable/c/cc7340f18e45886121c131227985d64ef666012f"},{"url":"https://git.kernel.org/stable/c/6b5325f2457521bbece29499970c0117a648c620"},{"url":"https://git.kernel.org/stable/c/f5e9a22d19bb98a7e86034db85eb295e94187caa"},{"url":"https://git.kernel.org/stable/c/468a729b78895893d0e580ceea49bed8ada2a2bd"},{"url":"https://git.kernel.org/stable/c/f8321fa75102246d7415a6af441872f6637c93ab"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T20:30:44.066Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"5.4.284"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"5.10.226"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"5.15.167"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"6.1.109"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"6.6.50"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"6.10.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.0","versionEndExcluding":"6.11"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2024-43835","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-09-10T16:08:14.954725Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-09-12T17:33:23.316Z"}},{"title":"CVE Program Container","references":[{"url":"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"},{"url":"https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2025-11-03T22:05:26.358Z"}}]}}}