CVE-2026-64035 (GCVE-0-2026-64035)
Vulnerability from cvelistv5 – Published: 2026-07-19 15:39 – Updated: 2026-08-05 12:38
VLAI
EPSS
VEX
Title
igc: set tx buffer type for SMD frames
Summary
In the Linux kernel, the following vulnerability has been resolved:
igc: set tx buffer type for SMD frames
Sashiko pointed out that igc_fpe_init_smd_frame() initializes
igc_tx_buffer fields for an SMD skb, but does not set the buffer type:
https://sashiko.dev/#/patchset/20260415025226.114115-1-kohei%40enjuk.jp
Since igc_tx_buffer entries are reused, a stale XDP or XSK type can
remain and make TX completion use the wrong cleanup path.
Set the buffer type to IGC_TX_BUFFER_TYPE_SKB.
Severity
9.8 (Critical)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
5422570c0010bb968738f9256eb2bf83e79b4d63 , < 1f83545f432d106d5fc71d3997b2d382104ebcc4
(git)
Affected: 5422570c0010bb968738f9256eb2bf83e79b4d63 , < 1c8587bd025244aa52061f5ceecbf5e68a1063d9 (git) Affected: 5422570c0010bb968738f9256eb2bf83e79b4d63 , < 5acc641e590e008caaed480ed9ffae47cf7ecbdf (git) |
guessed | |
| Linux | Linux |
Affected:
6.16
Unaffected: 0 , < 6.16 (semver) Unaffected: 6.18.34 , ≤ 6.18.* (semver) Unaffected: 7.0.11 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/net/ethernet/intel/igc/igc_tsn.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "1f83545f432d106d5fc71d3997b2d382104ebcc4",
"status": "affected",
"version": "5422570c0010bb968738f9256eb2bf83e79b4d63",
"versionType": "git"
},
{
"lessThan": "1c8587bd025244aa52061f5ceecbf5e68a1063d9",
"status": "affected",
"version": "5422570c0010bb968738f9256eb2bf83e79b4d63",
"versionType": "git"
},
{
"lessThan": "5acc641e590e008caaed480ed9ffae47cf7ecbdf",
"status": "affected",
"version": "5422570c0010bb968738f9256eb2bf83e79b4d63",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/net/ethernet/intel/igc/igc_tsn.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.16"
},
{
"lessThan": "6.16",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.34",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.0.*",
"status": "unaffected",
"version": "7.0.11",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.34",
"versionStartIncluding": "6.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.0.11",
"versionStartIncluding": "6.16",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1",
"versionStartIncluding": "6.16",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"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."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:N - The vulnerable TX completion path is reached when the igc driver receives an Ethernet SMD-V/SMD-R mPacket from a link partner and automatically transmits an SMD response frame; 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."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-05T12:38:29.607Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"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"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-64035",
"datePublished": "2026-07-19T15:39:24.128Z",
"dateReserved": "2026-07-19T07:54:57.028Z",
"dateUpdated": "2026-08-05T12:38:29.607Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-64035",
"date": "2026-10-04",
"epss": "0.00649",
"percentile": "0.4933"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/net/ethernet/intel/igc/igc_tsn.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
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"status": "affected",
"version": "5422570c0010bb968738f9256eb2bf83e79b4d63",
"versionType": "git"
},
{
"lessThan": "1c8587bd025244aa52061f5ceecbf5e68a1063d9",
"status": "affected",
"version": "5422570c0010bb968738f9256eb2bf83e79b4d63",
"versionType": "git"
},
{
"lessThan": "5acc641e590e008caaed480ed9ffae47cf7ecbdf",
"status": "affected",
"version": "5422570c0010bb968738f9256eb2bf83e79b4d63",
"versionType": "git"
}
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},
{
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"product": "Linux",
"programFiles": [
"drivers/net/ethernet/intel/igc/igc_tsn.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.16"
},
{
"lessThan": "6.16",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.34",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.0.*",
"status": "unaffected",
"version": "7.0.11",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"cveTags": [],
"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."
}
],
"id": "CVE-2026-64035",
"lastModified": "2026-07-30T14:59:47.950",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 5.9,
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary"
}
]
},
"published": "2026-07-19T16:17:43.740",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/1c8587bd025244aa52061f5ceecbf5e68a1063d9"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/1f83545f432d106d5fc71d3997b2d382104ebcc4"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/5acc641e590e008caaed480ed9ffae47cf7ecbdf"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Awaiting Analysis"
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-08-05T14:21:10+00:00",
"cve": "CVE-2026-64035",
"id": "CVE-2026-64035",
"initial_release_date": "2026-07-19T00:00:00+00:00",
"product_status:known_affected": "184",
"product_status:known_not_affected": "90",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: igc: set tx buffer type for SMD frames",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64035.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "important",
"current_release_date": "2026-10-01T00:46:24Z",
"cve": "CVE-2026-64035",
"id": "CVE-2026-64035",
"initial_release_date": "2026-07-21T13:01:02Z",
"product_status:known_not_affected": "376",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-64035",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64035.json",
"version": "4"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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