{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-46321", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.112Z", "datePublished": "2026-06-09T12:11:13.872Z", "dateUpdated": "2026-06-09T12:11:13.872Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-09T12:11:13.872Z"}, "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/tun.c"], "versions": [{"version": "049584807f1d797fc3078b68035450a9769eb5c3", "lessThan": "69863ff2720a0e9871f1a5710f2a33a94217fee0", "status": "affected", "versionType": "git"}, {"version": "049584807f1d797fc3078b68035450a9769eb5c3", "lessThan": "37a1c268c2c8090bf4dc552d732bd23ba36f8eb0", "status": "affected", "versionType": "git"}, {"version": "049584807f1d797fc3078b68035450a9769eb5c3", "lessThan": "98c67be9eb9de72465a071949e84a3cdb8fab5a3", "status": "affected", "versionType": "git"}, {"version": "049584807f1d797fc3078b68035450a9769eb5c3", "lessThan": "f4feb1e20058e407cb00f45aff47f5b7e19a6bbf", "status": "affected", "versionType": "git"}, {"version": "32b0aaba5dbc85816898167d9b5d45a22eae82e9", "status": "affected", "versionType": "git"}, {"version": "6100e0237204890269e3f934acfc50d35fd6f319", "status": "affected", "versionType": "git"}, {"version": "589382f50b4a5d90d16d8bc9dcbc0e927a3e39b2", "status": "affected", "versionType": "git"}, {"version": "ad6b3f622ccfb4bfedfa53b6ebd91c3d1d04f146", "status": "affected", "versionType": "git"}, {"version": "d5ad89b7d01ed4e66fd04734fc63d6e78536692a", "status": "affected", "versionType": "git"}, {"version": "a9d1c27e2ee3b0ea5d40c105d6e728fc114470bb", "status": "affected", "versionType": "git"}, {"version": "8418f55302fa1d2eeb73e16e345167e545c598a5", "status": "affected", "versionType": "git"}, {"version": "5.4.281", "lessThan": "5.5", "status": "affected", "versionType": "semver"}, {"version": "5.10.223", "lessThan": "5.11", "status": "affected", "versionType": "semver"}, {"version": "5.15.164", "lessThan": "5.16", "status": "affected", "versionType": "semver"}, {"version": "6.1.102", "lessThan": "6.2", "status": "affected", "versionType": "semver"}, {"version": "6.6.43", "lessThan": "6.7", "status": "affected", "versionType": "semver"}, {"version": "6.9.12", "lessThan": "6.10", "status": "affected", "versionType": "semver"}, {"version": "6.10.2", "lessThan": "6.11", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/tun.c"], "versions": [{"version": "6.11", "status": "affected"}, {"version": "0", "lessThan": "6.11", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.93", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.35", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.12", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1-rc6", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "6.12.93"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "6.18.35"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "7.0.12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "7.1-rc6"}, {"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"}]}]}], "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"}}}}

{}

{"cveTags": [], "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."}], "id": "CVE-2026-46321", "lastModified": "2026-06-09T13:16:37.473", "metrics": {}, "published": "2026-06-09T13:16:37.473", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/37a1c268c2c8090bf4dc552d732bd23ba36f8eb0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/69863ff2720a0e9871f1a5710f2a33a94217fee0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/98c67be9eb9de72465a071949e84a3cdb8fab5a3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f4feb1e20058e407cb00f45aff47f5b7e19a6bbf"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[049584807f1d797fc3078b68035450a9769eb5c3,69863ff2720a0e9871f1a5710f2a33a94217fee0]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[049584807f1d797fc3078b68035450a9769eb5c3,37a1c268c2c8090bf4dc552d732bd23ba36f8eb0]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[049584807f1d797fc3078b68035450a9769eb5c3,98c67be9eb9de72465a071949e84a3cdb8fab5a3]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[049584807f1d797fc3078b68035450a9769eb5c3,f4feb1e20058e407cb00f45aff47f5b7e19a6bbf]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "32b0aaba5dbc85816898167d9b5d45a22eae82e9"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "6100e0237204890269e3f934acfc50d35fd6f319"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "589382f50b4a5d90d16d8bc9dcbc0e927a3e39b2"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "ad6b3f622ccfb4bfedfa53b6ebd91c3d1d04f146"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "d5ad89b7d01ed4e66fd04734fc63d6e78536692a"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "a9d1c27e2ee3b0ea5d40c105d6e728fc114470bb"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "8418f55302fa1d2eeb73e16e345167e545c598a5"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.4.281,5.5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.10.223,5.11)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.15.164,5.16)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.1.102,6.2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.6.43,6.7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.9.12,6.10)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.10.2,6.11)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.11"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.11)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.93,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.35,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.12,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1-rc6,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-06-09T13:30:04.958694+00:00", "updated": "2026-06-09T13:45:05.457894+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}