{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-72399", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.925Z", "datePublished": "2026-08-15T05:56:24.926Z", "dateUpdated": "2026-08-17T05:43:41.891Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:43:41.891Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: enetc: check the number of BDs needed for xdp_frame\n\nThe size of xdp_redirect_arr array is ENETC_MAX_SKB_FRAGS. However, the\nnumber of fragments contained in xdp_frame may be greater than or equal\nto ENETC_MAX_SKB_FRAGS, which will cause the access to xdp_redirect_arr\nto be out of bounds." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL" }, "scenarios": [ { "lang": "en", "value": "AV:N - Remote attackers can deliver multi-fragment frames to an XDP-enabled ingress path that bpf_redirect_map/devmap forwards to an ENETC PF netdev, reaching enetc_xdp_xmit via the standard XDP_REDIRECT flush path without local access.\nAC:L - Once XDP redirect to ENETC is deployed, an attacker can reliably craft or segment traffic to produce xdp_frames with nr_frags+1>13; no race or uncontrollable memory layout is required to trigger the out-of-bounds write.\nPR:N - Exploitation requires no attacker privileges when XDP redirect is pre-deployed on the gateway (normal for edge filtering); unprivileged users with CAP_NET_ADMIN via user namespaces can also attach the needed BPF/XDP programs.\nUI:N - No victim interaction is required beyond sending crafted network traffic; exploitation is fully attacker-driven once the XDP redirect datapath exists.\nS:U - Impact is confined to kernel memory corruption and privilege escalation within the same kernel/host security boundary, not a cross-VM or IOMMU scope change.\nC:H - Stack out-of-bounds writes of enetc_tx_swbd structures past a 13-element array corrupt adjacent stack data and pointers, providing a memory-corruption primitive that can be leveraged for arbitrary kernel memory disclosure.\nI:H - The overflow writes attacker-influenced enetc_tx_swbd fields (DMA addresses, lengths, frame pointers) beyond the buffer bounds, enabling heap/stack corruption suitable for arbitrary write and potential code execution.\nA:H - Corrupting stack-resident transmit metadata and pointers in enetc_xdp_xmit can cause immediate kernel oops/panic or hung transmit paths, constituting total loss of availability." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/freescale/enetc/enetc.c" ], "versions": [ { "version": "9d2b68cc108db2fdb35022ed2d88cfb305c441a6", "lessThan": "1ecb199b0e6d12ab6c26c0b7edf1a8f4472d9aed", "status": "affected", "versionType": "git" }, { "version": "9d2b68cc108db2fdb35022ed2d88cfb305c441a6", "lessThan": "f55276160ffad3e235b657ee4b7304eb99b90e5c", "status": "affected", "versionType": "git" }, { "version": "9d2b68cc108db2fdb35022ed2d88cfb305c441a6", "lessThan": "cfbc6e9b84dcc0aa2d65c84ea4745af327763209", "status": "affected", "versionType": "git" }, { "version": "9d2b68cc108db2fdb35022ed2d88cfb305c441a6", "lessThan": "1681cc7974a6123f5d5740b03bc11e4784bd2542", "status": "affected", "versionType": "git" }, { "version": "9d2b68cc108db2fdb35022ed2d88cfb305c441a6", "lessThan": "d22829101ab675607ad6c3d420fb3ab875f46bbb", "status": "affected", "versionType": "git" }, { "version": "9d2b68cc108db2fdb35022ed2d88cfb305c441a6", "lessThan": "555c5475e787802eeae0d2b91c2f66c330db2767", "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/ethernet/freescale/enetc/enetc.c" ], "versions": [ { "version": "5.13", "status": "affected" }, { "version": "0", "lessThan": "5.13", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "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": "5.13", "versionEndExcluding": "6.1.178" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.6.145" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.12.97" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.18.40" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "7.1.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "7.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/1ecb199b0e6d12ab6c26c0b7edf1a8f4472d9aed" }, { "url": "https://git.kernel.org/stable/c/f55276160ffad3e235b657ee4b7304eb99b90e5c" }, { "url": "https://git.kernel.org/stable/c/cfbc6e9b84dcc0aa2d65c84ea4745af327763209" }, { "url": "https://git.kernel.org/stable/c/1681cc7974a6123f5d5740b03bc11e4784bd2542" }, { "url": "https://git.kernel.org/stable/c/d22829101ab675607ad6c3d420fb3ab875f46bbb" }, { "url": "https://git.kernel.org/stable/c/555c5475e787802eeae0d2b91c2f66c330db2767" } ], "title": "net: enetc: check the number of BDs needed for xdp_frame", "x_generator": { "engine": "bippy-1.2.0" } } } }