CVE-2023-53669

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Triggering requires local socket/syscall activity.\nAC:L - The local attacker controls every precondition \u2014 enabling BIG TCP (CAP_NET_ADMIN via user namespace on a private netns device), using THP/hugepage-backed buffers, and sending MSG_ZEROCOPY payloads sized to overflow \u2014 so the overflow is reliably reproducible.\nPR:L - Exploitation requires running local code (MSG_ZEROCOPY sendmsg) and CAP_NET_ADMIN to raise gso_max_size, both available to a basic unprivileged user through an unprivileged user+network namespace. No real root is needed.\nUI:N - The attacker triggers the overflow entirely through its own socket operations; no action by another user is required.\nS:U - The out-of-bounds write corrupts kernel heap within the same kernel security authority; there is no crossing of a VM/IOMMU/sandbox boundary.\nC:H - The OOB write corrupts skb_shared_info frag page descriptors, which can be steered so kernel data is read/transmitted from attacker-influenced pages, and per guidance memory corruption leveragable for disclosure scores High.\nI:H - This is a controllable-size out-of-bounds heap write (frag descriptors written past the frags array), providing a write primitive suitable for control-flow hijacking or privilege escalation.\nA:H - The overflow reliably corrupts adjacent memory and was reported as causing kernel crashes (oops/panic), a full denial of service."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/core/skbuff.c"], "versions": [{"version": "7c4e983c4f3cf94fcd879730c6caa877e0768a4d", "lessThan": "7fa93e39fbb0566019c388a8038a4d58552e0910", "status": "affected", "versionType": "git"}, {"version": "7c4e983c4f3cf94fcd879730c6caa877e0768a4d", "lessThan": "3c77a377877acbaf03cd7caa21d3644a5dd16301", "status": "affected", "versionType": "git"}, {"version": "7c4e983c4f3cf94fcd879730c6caa877e0768a4d", "lessThan": "9cd62f0ba465cf647c7d8c2ca7b0d99ea0c1328f", "status": "affected", "versionType": "git"}, {"version": "7c4e983c4f3cf94fcd879730c6caa877e0768a4d", "lessThan": "7e692df3933628d974acb9f5b334d2b3e885e2a6", "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/core/skbuff.c"], "versions": [{"version": "5.19", "status": "affected"}, {"version": "0", "lessThan": "5.19", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.29", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.2.16", "lessThanOrEqual": "6.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.3.3", "lessThanOrEqual": "6.3.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.4", "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": "5.19", "versionEndExcluding": "6.1.29"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.2.16"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.3.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.4"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/7fa93e39fbb0566019c388a8038a4d58552e0910"}, {"url": "https://git.kernel.org/stable/c/3c77a377877acbaf03cd7caa21d3644a5dd16301"}, {"url": "https://git.kernel.org/stable/c/9cd62f0ba465cf647c7d8c2ca7b0d99ea0c1328f"}, {"url": "https://git.kernel.org/stable/c/7e692df3933628d974acb9f5b334d2b3e885e2a6"}], "title": "tcp: fix skb_copy_ubufs() vs BIG TCP", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2023-53669", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-15T21:36:19.702687Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-15T21:41:32.929Z"}}]}}

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{"bugzilla": {"description": "kernel: tcp: fix skb_copy_ubufs() vs BIG TCP", "id": "2402224", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2402224"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2023-53669", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Under investigation", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:rhivos:1", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat In-Vehicle Operating System 1"}], "public_date": "2025-10-07T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-53669\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-53669\nhttps://lore.kernel.org/linux-cve-announce/2025100705-CVE-2023-53669-f81f@gregkh/T"], "threat_severity": "Important"}

{"created": "2025-10-08T13:35:36.369142+00:00", "updated": "2025-10-08T13:35:36.369167+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}