{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-23048", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-01-13T15:37:45.949Z", "datePublished": "2026-02-04T16:00:30.232Z", "dateUpdated": "2026-02-04T16:00:30.232Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-02-04T16:00:30.232Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nudp: call skb_orphan() before skb_attempt_defer_free()\n\nStandard UDP receive path does not use skb->destructor.\n\nBut skmsg layer does use it, since it calls skb_set_owner_sk_safe()\nfrom udp_read_skb().\n\nThis then triggers this warning in skb_attempt_defer_free():\n\n DEBUG_NET_WARN_ON_ONCE(skb->destructor);\n\nWe must call skb_orphan() to fix this issue."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv4/udp.c"], "versions": [{"version": "6471658dc66c670580a7616e75f51b52917e7883", "lessThan": "0c63d5683eae6a7b4d81382bcbecb2a19feff90d", "status": "affected", "versionType": "git"}, {"version": "6471658dc66c670580a7616e75f51b52917e7883", "lessThan": "e5c8eda39a9fc1547d1398d707aa06c1d080abdd", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv4/udp.c"], "versions": [{"version": "6.18", "status": "affected"}, {"version": "0", "lessThan": "6.18", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.6", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19-rc5", "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": "6.18", "versionEndExcluding": "6.18.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "6.19-rc5"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/0c63d5683eae6a7b4d81382bcbecb2a19feff90d"}, {"url": "https://git.kernel.org/stable/c/e5c8eda39a9fc1547d1398d707aa06c1d080abdd"}], "title": "udp: call skb_orphan() before skb_attempt_defer_free()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nudp: call skb_orphan() before skb_attempt_defer_free()\n\nStandard UDP receive path does not use skb->destructor.\n\nBut skmsg layer does use it, since it calls skb_set_owner_sk_safe()\nfrom udp_read_skb().\n\nThis then triggers this warning in skb_attempt_defer_free():\n\n DEBUG_NET_WARN_ON_ONCE(skb->destructor);\n\nWe must call skb_orphan() to fix this issue."}], "id": "CVE-2026-23048", "lastModified": "2026-02-04T16:33:44.537", "metrics": {}, "published": "2026-02-04T16:16:20.343", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0c63d5683eae6a7b4d81382bcbecb2a19feff90d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e5c8eda39a9fc1547d1398d707aa06c1d080abdd"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{}

{}