CVE-2026-46321

{"id": "CVE-2026-46321", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 7.1, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 4.0, "exploitabilityScore": 2.5}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6100e0237204890269e3f934acfc50d35fd6f319", "lessThan": "0a6f46a9332ad6958992d64d3b3a81a80b2ca940", "versionType": "git"}, {"status": "affected", "version": "589382f50b4a5d90d16d8bc9dcbc0e927a3e39b2", "lessThan": "0e8211fcf9426f5adddf32516ba0f400ceb9544d", "versionType": "git"}, {"status": "affected", "version": "ad6b3f622ccfb4bfedfa53b6ebd91c3d1d04f146", "lessThan": "e915445942af6dcea628bf66d6241641201a0c41", "versionType": "git"}, {"status": "affected", "version": "d5ad89b7d01ed4e66fd04734fc63d6e78536692a", "lessThan": "5b34f9e4fe2f203724a6e893d6df0316b9670057", "versionType": "git"}, {"status": "affected", "version": "049584807f1d797fc3078b68035450a9769eb5c3", "lessThan": "69863ff2720a0e9871f1a5710f2a33a94217fee0", "versionType": "git"}, {"status": "affected", "version": "049584807f1d797fc3078b68035450a9769eb5c3", "lessThan": "37a1c268c2c8090bf4dc552d732bd23ba36f8eb0", "versionType": "git"}, {"status": "affected", "version": "049584807f1d797fc3078b68035450a9769eb5c3", "lessThan": "98c67be9eb9de72465a071949e84a3cdb8fab5a3", "versionType": "git"}, {"status": "affected", "version": "049584807f1d797fc3078b68035450a9769eb5c3", "lessThan": "f4feb1e20058e407cb00f45aff47f5b7e19a6bbf", "versionType": "git"}, {"status": "affected", "version": "32b0aaba5dbc85816898167d9b5d45a22eae82e9", "versionType": "git"}, {"status": "affected", "version": "a9d1c27e2ee3b0ea5d40c105d6e728fc114470bb", "versionType": "git"}, {"status": "affected", "version": "8418f55302fa1d2eeb73e16e345167e545c598a5", "versionType": "git"}, {"status": "affected", "version": "5.10.223", "lessThan": "5.10.259", "versionType": "semver"}, {"status": "affected", "version": "5.15.164", "lessThan": "5.15.210", "versionType": "semver"}, {"status": "affected", "version": "6.1.102", "lessThan": "6.1.176", "versionType": "semver"}, {"status": "affected", "version": "6.6.43", "lessThan": "6.6.143", "versionType": "semver"}, {"status": "affected", "version": "5.4.281", "lessThan": "5.5", "versionType": "semver"}, {"status": "affected", "version": "6.9.12", "lessThan": "6.10", "versionType": "semver"}, {"status": "affected", "version": "6.10.2", "lessThan": "6.11", "versionType": "semver"}], "programFiles": ["drivers/net/tun.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.11"}, {"status": "unaffected", "version": "0", "lessThan": "6.11", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.259", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.210", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.176", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.143", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.93", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.35", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.0.12", "versionType": "semver", "lessThanOrEqual": "7.0.*"}, {"status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/net/tun.c"], "defaultStatus": "affected"}]}], "published": "2026-06-09T13:16:37.473", "references": [{"url": "https://git.kernel.org/stable/c/0a6f46a9332ad6958992d64d3b3a81a80b2ca940", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/0e8211fcf9426f5adddf32516ba0f400ceb9544d", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/37a1c268c2c8090bf4dc552d732bd23ba36f8eb0", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/5b34f9e4fe2f203724a6e893d6df0316b9670057", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/69863ff2720a0e9871f1a5710f2a33a94217fee0", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/98c67be9eb9de72465a071949e84a3cdb8fab5a3", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e915445942af6dcea628bf66d6241641201a0c41", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/f4feb1e20058e407cb00f45aff47f5b7e19a6bbf", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "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."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ntun: liberar p\u00e1gina en el rechazo de tramas cortas en tun_xdp_one()\n\ntun_xdp_one() devuelve -EINVAL en una trama m\u00e1s corta que ETH_HLEN sin liberar la p\u00e1gina que vhost_net_build_xdp() asign\u00f3 para ella. tun_sendmsg() descarta ese -EINVAL y a\u00fan devuelve total_len, por lo que vhost_tx_batch() toma la ruta de \u00e9xito y nunca libera la p\u00e1gina; cada trama corta en un lote filtra un chunk de fragmento de p\u00e1gina.\n\nUn proceso local que puede abrir /dev/net/tun y /dev/vhost-net puede alcanzar esta ruta: adjunta un dispositivo tun/tap como el backend de vhost-net y alimenta descriptores TX cuya longitud menos el encabezado virtio-net est\u00e1 por debajo de ETH_HLEN. Cada kick filtra los chunks de fragmentos de p\u00e1gina para ese lote, y un bucle de env\u00edo ajustado agota la memoria del host y desencadena un p\u00e1nico OOM. Liberar la p\u00e1gina antes de devolver -EINVAL, coincidiendo con la ruta de error del programa XDP en la misma funci\u00f3n."}], "lastModified": "2026-07-23T08:10:00.137", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9247B8C6-D97A-4CCC-B960-AFD2F536EFC1", "versionEndExcluding": "5.5", "versionStartIncluding": "5.4.281"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F8D8E517-E90E-4A05-B563-DF7F717264E2", "versionEndExcluding": "5.10.259", "versionStartIncluding": "5.10.223"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4C7A70B4-6094-4392-99CE-5713E2A31596", "versionEndExcluding": "5.15.210", "versionStartIncluding": "5.15.164"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "650D4114-2C4E-4BF7-8AB9-4CC4104FEC16", "versionEndExcluding": "6.1.176", "versionStartIncluding": "6.1.102"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5AF81631-4260-4438-AE5B-61C04CA0BAA0", "versionEndExcluding": "6.6.143", "versionStartIncluding": "6.6.43"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1FA62583-78C1-42CE-900B-6D2B268EAED2", "versionEndExcluding": "6.10", "versionStartIncluding": "6.9.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DAD5D9AB-C0E6-44DF-8475-306495552E60", "versionEndExcluding": "6.12.93", "versionStartIncluding": "6.10.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0FCCB23A-7629-4386-93B6-B119237C4382", "versionEndExcluding": "6.18.35", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9161A938-0FA8-44BC-95FE-C5A271601AB3", "versionEndExcluding": "7.0.12", "versionStartIncluding": "6.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B1EF7059-E670-45F4-B422-54C40FA86390"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0D38F0BF-A728-4133-A358-D44A2F7EE6D6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "EC732D08-5F7B-46D9-B154-E60C7F4F0A97"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E5910A9D-F60A-409A-B486-FE66BFEBA9B9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "81DFF19E-9CF8-49C6-8C36-1E4038622933"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}