{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-46320", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.112Z", "datePublished": "2026-06-09T12:11:12.882Z", "dateUpdated": "2026-06-09T12:11:12.882Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-09T12:11:12.882Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntap: free page on error paths in tap_get_user_xdp()\n\ntap_get_user_xdp() rejects a frame shorter than ETH_HLEN with -EINVAL,\nand returns -ENOMEM when build_skb() fails. Both paths jump to the err\nlabel without freeing the page that vhost_net_build_xdp() allocated for\nthe frame. tap_sendmsg() discards the per-buffer return value and always\nreturns 0, so vhost_tx_batch() takes the success path and never frees\nthe page; each rejected frame in a batch leaks one page-frag chunk.\n\nFree the page on both error paths, before the skb is built. This is the\ntap counterpart of the same leak in tun_xdp_one()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/tap.c"], "versions": [{"version": "0efac27791ee068075d80f07c55a229b1335ce12", "lessThan": "18a84c35842e19cd3c5534d8cee73d31863f696d", "status": "affected", "versionType": "git"}, {"version": "0efac27791ee068075d80f07c55a229b1335ce12", "lessThan": "3bcf7aec6a9d16438f2cec29f5d7c8d5b8edf9b2", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/tap.c"], "versions": [{"version": "4.20", "status": "affected"}, {"version": "0", "lessThan": "4.20", "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": "4.20", "versionEndExcluding": "7.0.12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "7.1-rc6"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/18a84c35842e19cd3c5534d8cee73d31863f696d"}, {"url": "https://git.kernel.org/stable/c/3bcf7aec6a9d16438f2cec29f5d7c8d5b8edf9b2"}], "title": "tap: free page on error paths in tap_get_user_xdp()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntap: free page on error paths in tap_get_user_xdp()\n\ntap_get_user_xdp() rejects a frame shorter than ETH_HLEN with -EINVAL,\nand returns -ENOMEM when build_skb() fails. Both paths jump to the err\nlabel without freeing the page that vhost_net_build_xdp() allocated for\nthe frame. tap_sendmsg() discards the per-buffer return value and always\nreturns 0, so vhost_tx_batch() takes the success path and never frees\nthe page; each rejected frame in a batch leaks one page-frag chunk.\n\nFree the page on both error paths, before the skb is built. This is the\ntap counterpart of the same leak in tun_xdp_one()."}], "id": "CVE-2026-46320", "lastModified": "2026-06-09T13:16:37.373", "metrics": {}, "published": "2026-06-09T13:16:37.373", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/18a84c35842e19cd3c5534d8cee73d31863f696d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3bcf7aec6a9d16438f2cec29f5d7c8d5b8edf9b2"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: tap: free page on error paths in tap_get_user_xdp()", "id": "2486985", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2486985"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-772", "details": ["A flaw was found in the Linux kernel's tap driver. This vulnerability occurs in the `tap_get_user_xdp()` function, where allocated memory pages are not properly freed when processing rejected network frames. Specifically, if a frame is shorter than the expected Ethernet header length or if memory allocation fails, the error handling paths do not release the previously allocated page. This oversight can lead to a memory leak, as each rejected frame in a batch can cause one page-frag chunk to be leaked, potentially impacting system stability and performance over time."], "name": "CVE-2026-46320", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-06-09T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-46320\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-46320\nhttps://lore.kernel.org/linux-cve-announce/2026060925-CVE-2026-46320-71d9@gregkh/T"], "threat_severity": "Moderate"}