{"api_version":"1","generated_at":"2026-06-15T03:01:24+00:00","cve":"CVE-2026-46321","urls":{"html":"https://cve.report/CVE-2026-46321","api":"https://cve.report/api/cve/CVE-2026-46321.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-46321","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-46321"},"summary":{"title":"tun: free page on short-frame rejection in tun_xdp_one()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntun: free page on short-frame rejection in tun_xdp_one()\n\ntun_xdp_one() returns -EINVAL on a frame shorter than ETH_HLEN without\nfreeing the page that vhost_net_build_xdp() allocated for it.\ntun_sendmsg() discards that -EINVAL and still returns total_len, so\nvhost_tx_batch() takes the success path and never frees the page; each\nshort frame in a batch leaks one page-frag chunk.\n\nA local process that can open /dev/net/tun and /dev/vhost-net can hit\nthis path: it attaches a tun/tap device as the vhost-net backend and\nfeeds TX descriptors whose length minus the virtio-net header is below\nETH_HLEN. Each kick leaks the page-frag chunks for that batch, and a\ntight submission loop exhausts host memory and triggers an OOM panic.\nFree the page before returning -EINVAL, matching the XDP-program error\npath in the same function.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-06-09 13:16:37","updated_at":"2026-06-14 06:16:24"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.1","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","baseScore":7.1,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.1","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","data":{"baseScore":7.1,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/98c67be9eb9de72465a071949e84a3cdb8fab5a3","name":"https://git.kernel.org/stable/c/98c67be9eb9de72465a071949e84a3cdb8fab5a3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f4feb1e20058e407cb00f45aff47f5b7e19a6bbf","name":"https://git.kernel.org/stable/c/f4feb1e20058e407cb00f45aff47f5b7e19a6bbf","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/37a1c268c2c8090bf4dc552d732bd23ba36f8eb0","name":"https://git.kernel.org/stable/c/37a1c268c2c8090bf4dc552d732bd23ba36f8eb0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/69863ff2720a0e9871f1a5710f2a33a94217fee0","name":"https://git.kernel.org/stable/c/69863ff2720a0e9871f1a5710f2a33a94217fee0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-46321","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46321","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 049584807f1d797fc3078b68035450a9769eb5c3 69863ff2720a0e9871f1a5710f2a33a94217fee0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 049584807f1d797fc3078b68035450a9769eb5c3 37a1c268c2c8090bf4dc552d732bd23ba36f8eb0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 049584807f1d797fc3078b68035450a9769eb5c3 98c67be9eb9de72465a071949e84a3cdb8fab5a3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 049584807f1d797fc3078b68035450a9769eb5c3 f4feb1e20058e407cb00f45aff47f5b7e19a6bbf git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 32b0aaba5dbc85816898167d9b5d45a22eae82e9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6100e0237204890269e3f934acfc50d35fd6f319 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 589382f50b4a5d90d16d8bc9dcbc0e927a3e39b2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ad6b3f622ccfb4bfedfa53b6ebd91c3d1d04f146 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d5ad89b7d01ed4e66fd04734fc63d6e78536692a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a9d1c27e2ee3b0ea5d40c105d6e728fc114470bb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8418f55302fa1d2eeb73e16e345167e545c598a5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.4.281 5.5 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.10.223 5.11 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.15.164 5.16 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.1.102 6.2 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.6.43 6.7 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.9.12 6.10 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.10.2 6.11 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.11","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.11 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.93 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.35 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.12 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1-rc6 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"46321","cve":"CVE-2026-46321","epss":"0.000120000","percentile":"0.017050000","score_date":"2026-06-14","updated_at":"2026-06-15 00:14:07"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/tun.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"69863ff2720a0e9871f1a5710f2a33a94217fee0","status":"affected","version":"049584807f1d797fc3078b68035450a9769eb5c3","versionType":"git"},{"lessThan":"37a1c268c2c8090bf4dc552d732bd23ba36f8eb0","status":"affected","version":"049584807f1d797fc3078b68035450a9769eb5c3","versionType":"git"},{"lessThan":"98c67be9eb9de72465a071949e84a3cdb8fab5a3","status":"affected","version":"049584807f1d797fc3078b68035450a9769eb5c3","versionType":"git"},{"lessThan":"f4feb1e20058e407cb00f45aff47f5b7e19a6bbf","status":"affected","version":"049584807f1d797fc3078b68035450a9769eb5c3","versionType":"git"},{"status":"affected","version":"32b0aaba5dbc85816898167d9b5d45a22eae82e9","versionType":"git"},{"status":"affected","version":"6100e0237204890269e3f934acfc50d35fd6f319","versionType":"git"},{"status":"affected","version":"589382f50b4a5d90d16d8bc9dcbc0e927a3e39b2","versionType":"git"},{"status":"affected","version":"ad6b3f622ccfb4bfedfa53b6ebd91c3d1d04f146","versionType":"git"},{"status":"affected","version":"d5ad89b7d01ed4e66fd04734fc63d6e78536692a","versionType":"git"},{"status":"affected","version":"a9d1c27e2ee3b0ea5d40c105d6e728fc114470bb","versionType":"git"},{"status":"affected","version":"8418f55302fa1d2eeb73e16e345167e545c598a5","versionType":"git"},{"lessThan":"5.5","status":"affected","version":"5.4.281","versionType":"semver"},{"lessThan":"5.11","status":"affected","version":"5.10.223","versionType":"semver"},{"lessThan":"5.16","status":"affected","version":"5.15.164","versionType":"semver"},{"lessThan":"6.2","status":"affected","version":"6.1.102","versionType":"semver"},{"lessThan":"6.7","status":"affected","version":"6.6.43","versionType":"semver"},{"lessThan":"6.10","status":"affected","version":"6.9.12","versionType":"semver"},{"lessThan":"6.11","status":"affected","version":"6.10.2","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/tun.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.11"},{"lessThan":"6.11","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.93","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.35","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.12","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1-rc6","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.93","versionStartIncluding":"6.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.35","versionStartIncluding":"6.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.12","versionStartIncluding":"6.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1-rc6","versionStartIncluding":"6.11","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4.281","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.223","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.164","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.102","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.43","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10.2","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ntun: free page on short-frame rejection in tun_xdp_one()\n\ntun_xdp_one() returns -EINVAL on a frame shorter than ETH_HLEN without\nfreeing the page that vhost_net_build_xdp() allocated for it.\ntun_sendmsg() discards that -EINVAL and still returns total_len, so\nvhost_tx_batch() takes the success path and never frees the page; each\nshort frame in a batch leaks one page-frag chunk.\n\nA local process that can open /dev/net/tun and /dev/vhost-net can hit\nthis path: it attaches a tun/tap device as the vhost-net backend and\nfeeds TX descriptors whose length minus the virtio-net header is below\nETH_HLEN. Each kick leaks the page-frag chunks for that batch, and a\ntight submission loop exhausts host memory and triggers an OOM panic.\nFree the page before returning -EINVAL, matching the XDP-program error\npath in the same function."}],"metrics":[{"cvssV3_1":{"baseScore":7.1,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","version":"3.1"}}],"providerMetadata":{"dateUpdated":"2026-06-14T04:30:16.094Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/69863ff2720a0e9871f1a5710f2a33a94217fee0"},{"url":"https://git.kernel.org/stable/c/37a1c268c2c8090bf4dc552d732bd23ba36f8eb0"},{"url":"https://git.kernel.org/stable/c/98c67be9eb9de72465a071949e84a3cdb8fab5a3"},{"url":"https://git.kernel.org/stable/c/f4feb1e20058e407cb00f45aff47f5b7e19a6bbf"}],"title":"tun: free page on short-frame rejection in tun_xdp_one()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-46321","datePublished":"2026-06-09T12:11:13.872Z","dateReserved":"2026-05-13T15:03:33.112Z","dateUpdated":"2026-06-14T04:30:16.094Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-09 13:16:37","lastModifiedDate":"2026-06-14 06:16:24","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","baseScore":7.1,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":2.5,"impactScore":4}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"46321","Ordinal":"1","Title":"tun: free page on short-frame rejection in tun_xdp_one()","CVE":"CVE-2026-46321","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"46321","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ntun: free page on short-frame rejection in tun_xdp_one()\n\ntun_xdp_one() returns -EINVAL on a frame shorter than ETH_HLEN without\nfreeing the page that vhost_net_build_xdp() allocated for it.\ntun_sendmsg() discards that -EINVAL and still returns total_len, so\nvhost_tx_batch() takes the success path and never frees the page; each\nshort frame in a batch leaks one page-frag chunk.\n\nA local process that can open /dev/net/tun and /dev/vhost-net can hit\nthis path: it attaches a tun/tap device as the vhost-net backend and\nfeeds TX descriptors whose length minus the virtio-net header is below\nETH_HLEN. Each kick leaks the page-frag chunks for that batch, and a\ntight submission loop exhausts host memory and triggers an OOM panic.\nFree the page before returning -EINVAL, matching the XDP-program error\npath in the same function.","Type":"Description","Title":"tun: free page on short-frame rejection in tun_xdp_one()"}]}}}