CVE-2026-64035

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this is a network-delivered L2 frame processed in the RX/NAPI path per kernel network-reachability guidance.\nAC:L - Once FPE/pMAC is enabled on the target, an attacker can repeatedly inject SMD-V frames to trigger SMD-R transmissions and race ring-slot reuse; stale XDP/XSK buffer types persist after prior transmissions on the same queue index, making reliable triggering feasible without conditions outside attacker influence.\nPR:N - Exploitation requires only the ability to send Ethernet frames to a host that already has FPE/pMAC administratively enabled (expected in TSN/industrial deployments); the attacker does not need local accounts, CAP_NET_ADMIN, or any authenticated session to reach the vulnerable code path.\nUI:N - No victim interaction is required; SMD response transmission and the resulting erroneous TX cleanup occur automatically in interrupt/NAPI context in response to attacker-supplied link-layer frames.\nS:U - Impact is confined to kernel memory corruption and privilege escalation within the same kernel security domain; this is not a VM escape, IOMMU bypass, or cross-authority sandbox breakout.\nC:H - Stale XDP buffer typing causes `xdp_return_frame()` to interpret an `sk_buff` pointer as an `xdp_frame`, a type confusion that reads attacker-influenced structure fields and can yield arbitrary kernel memory disclosure primitives.\nI:H - The wrong TX cleanup path performs improper `xdp_return_frame()`/`__xdp_return()` operations on mis-typed memory, enabling heap corruption and exploitable control-flow or arbitrary-write primitives typical of kernel type-confusion bugs.\nA:H - Mis-typed TX buffer cleanup can immediately kernel-oops or panic via invalid page-pool returns, and repeated triggering leaks SKBs/DMA mappings causing sustained denial of service on the affected interface or host."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/intel/igc/igc_tsn.c"], "versions": [{"version": "5422570c0010bb968738f9256eb2bf83e79b4d63", "lessThan": "1f83545f432d106d5fc71d3997b2d382104ebcc4", "status": "affected", "versionType": "git"}, {"version": "5422570c0010bb968738f9256eb2bf83e79b4d63", "lessThan": "1c8587bd025244aa52061f5ceecbf5e68a1063d9", "status": "affected", "versionType": "git"}, {"version": "5422570c0010bb968738f9256eb2bf83e79b4d63", "lessThan": "5acc641e590e008caaed480ed9ffae47cf7ecbdf", "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/intel/igc/igc_tsn.c"], "versions": [{"version": "6.16", "status": "affected"}, {"version": "0", "lessThan": "6.16", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.34", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.11", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "6.16", "versionEndExcluding": "6.18.34"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "7.0.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/1f83545f432d106d5fc71d3997b2d382104ebcc4"}, {"url": "https://git.kernel.org/stable/c/1c8587bd025244aa52061f5ceecbf5e68a1063d9"}, {"url": "https://git.kernel.org/stable/c/5acc641e590e008caaed480ed9ffae47cf7ecbdf"}], "title": "igc: set tx buffer type for SMD frames", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-64035", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T15:35:44.841022Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-665", "description": "CWE-665 Improper Initialization"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-19T20:28:10.044Z"}}]}}

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this is not a VM escape, IOMMU bypass, or cross-authority sandbox breakout.\nC:H - Stale XDP buffer typing causes `xdp_return_frame()` to interpret an `sk_buff` pointer as an `xdp_frame`, a type confusion that reads attacker-influenced structure fields and can yield arbitrary kernel memory disclosure primitives.\nI:H - The wrong TX cleanup path performs improper `xdp_return_frame()`/`__xdp_return()` operations on mis-typed memory, enabling heap corruption and exploitable control-flow or arbitrary-write primitives typical of kernel type-confusion bugs.\nA:H - Mis-typed TX buffer cleanup can immediately kernel-oops or panic via invalid page-pool returns, and repeated triggering leaks SKBs/DMA mappings causing sustained denial of service on the affected interface or host."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5422570c0010bb968738f9256eb2bf83e79b4d63", "lessThan": "1f83545f432d106d5fc71d3997b2d382104ebcc4", "versionType": "git"}, {"status": "affected", "version": "5422570c0010bb968738f9256eb2bf83e79b4d63", "lessThan": "1c8587bd025244aa52061f5ceecbf5e68a1063d9", "versionType": "git"}, {"status": "affected", "version": "5422570c0010bb968738f9256eb2bf83e79b4d63", "lessThan": "5acc641e590e008caaed480ed9ffae47cf7ecbdf", "versionType": "git"}], "programFiles": ["drivers/net/ethernet/intel/igc/igc_tsn.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.16"}, {"status": "unaffected", "version": "0", "lessThan": "6.16", "versionType": "semver"}, {"status": "unaffected", "version": "6.18.34", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.0.11", "versionType": "semver", "lessThanOrEqual": "7.0.*"}, {"status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/net/ethernet/intel/igc/igc_tsn.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/1f83545f432d106d5fc71d3997b2d382104ebcc4"}, {"url": "https://git.kernel.org/stable/c/1c8587bd025244aa52061f5ceecbf5e68a1063d9"}, {"url": "https://git.kernel.org/stable/c/5acc641e590e008caaed480ed9ffae47cf7ecbdf"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nigc: set tx buffer type for SMD frames\n\nSashiko pointed out that igc_fpe_init_smd_frame() initializes\nigc_tx_buffer fields for an SMD skb, but does not set the buffer type:\nhttps://sashiko.dev/#/patchset/20260415025226.114115-1-kohei%40enjuk.jp\n\nSince igc_tx_buffer entries are reused, a stale XDP or XSK type can\nremain and make TX completion use the wrong cleanup path.\n\nSet the buffer type to IGC_TX_BUFFER_TYPE_SKB."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.34", "versionStartIncluding": "6.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.0.11", "versionStartIncluding": "6.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1", "versionStartIncluding": "6.16"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:38:29.607Z"}}}, "cveMetadata": {"cveId": "CVE-2026-64035", "state": "PUBLISHED", "dateUpdated": "2026-10-19T20:28:10.044Z", "dateReserved": "2026-07-19T07:54:57.028Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-07-19T15:39:24.128Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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{"bugzilla": {"description": "kernel: igc: set tx buffer type for SMD frames", "id": "2502476", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502476"}, "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"}, "cwe": "CWE-909", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nigc: set tx buffer type for SMD frames\nSashiko pointed out that igc_fpe_init_smd_frame() initializes\nigc_tx_buffer fields for an SMD skb, but does not set the buffer type:\nhttps://sashiko.dev/#/patchset/20260415025226.114115-1-kohei%40enjuk.jp\nSince igc_tx_buffer entries are reused, a stale XDP or XSK type can\nremain and make TX completion use the wrong cleanup path.\nSet the buffer type to IGC_TX_BUFFER_TYPE_SKB.", "A flaw was found in the Linux kernel's igc network driver. The `igc_fpe_init_smd_frame()` function, responsible for initializing transmit (TX) buffer fields for Stream-based Data (SMD) frames, does not correctly set the buffer type. This can result in stale XDP (eXpress Data Path) or XSK (AF_XDP socket) types persisting in reused TX buffer entries. Consequently, the system's TX completion process may follow an incorrect cleanup path, potentially leading to memory corruption or system instability."], "name": "CVE-2026-64035", "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": "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"}], "public_date": "2026-07-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64035\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64035\nhttps://lore.kernel.org/linux-cve-announce/2026071905-CVE-2026-64035-207f@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5422570c0010bb968738f9256eb2bf83e79b4d63,1f83545f432d106d5fc71d3997b2d382104ebcc4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5422570c0010bb968738f9256eb2bf83e79b4d63,1c8587bd025244aa52061f5ceecbf5e68a1063d9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[5422570c0010bb968738f9256eb2bf83e79b4d63,5acc641e590e008caaed480ed9ffae47cf7ecbdf)"}}], "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": "[6.16,6.16]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.16)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.34,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.11,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1,*]"}}], "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": "2026-07-21T08:15:02.136366+00:00", "updated": "2026-10-20T09:00:13.970960+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}