CVE-2026-74548 (GCVE-0-2026-74548)
Vulnerability from cvelistv5 – Published: 2026-08-15 12:27 – Updated: 2026-08-19 16:38
VLAI
EPSS
VEX
Title
forcedeth: fix UAF of txrx_stats in nv_remove
Summary
In the Linux kernel, the following vulnerability has been resolved:
forcedeth: fix UAF of txrx_stats in nv_remove
nv_remove() frees the per-CPU txrx_stats before unregister_netdev().
Until unregister completes, ndo_get_stats64, the NAPI/xmit data path,
and nv_close()/drain may still access txrx_stats, leading to a
use-after-free.
Free the stats only after unregister_netdev().
Severity
7.8 (High)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
f4b633b911fd3b4cbe1dc065e8fb064078d0889d , < cdf864d5d3c813ae1876f2bacc1cf3ac3c66dfc9
(git)
Affected: f4b633b911fd3b4cbe1dc065e8fb064078d0889d , < 7c22b4ee0bd003cecfc14ca28981cb213e201f70 (git) Affected: f4b633b911fd3b4cbe1dc065e8fb064078d0889d , < d51ce7a63b76eda02cabfed1b0cc277b2f5c9bcc (git) Affected: f4b633b911fd3b4cbe1dc065e8fb064078d0889d , < cf2dcde2284562ff87830ca0b7fa2b06e95aef1e (git) Affected: f4b633b911fd3b4cbe1dc065e8fb064078d0889d , < c9d24a205fd508b9999fcab6aca4c590490a12cf (git) Affected: f4b633b911fd3b4cbe1dc065e8fb064078d0889d , < ae20a8a4de06a289d40b0a0633d8d573f1fcb049 (git) Affected: f4b633b911fd3b4cbe1dc065e8fb064078d0889d , < 201e05aa531eba0dfe2ee05b4e178f6ffa12c8b1 (git) Affected: f4b633b911fd3b4cbe1dc065e8fb064078d0889d , < 22666ba1420164753d7b0f5a841986b25ace5435 (git) |
guessed | |
| Linux | Linux |
Affected:
5.3
Unaffected: 0 , < 5.3 (semver) Unaffected: 5.10.265 , ≤ 5.10.* (semver) Unaffected: 5.15.216 , ≤ 5.15.* (semver) Unaffected: 6.1.183 , ≤ 6.1.* (semver) Unaffected: 6.6.151 , ≤ 6.6.* (semver) Unaffected: 6.12.103 , ≤ 6.12.* (semver) Unaffected: 6.18.44 , ≤ 6.18.* (semver) Unaffected: 7.1.8 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
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{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/net/ethernet/nvidia/forcedeth.c"
],
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"version": "5.10.265",
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},
{
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"version": "5.15.216",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "6.1.183",
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{
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"status": "unaffected",
"version": "6.6.151",
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},
{
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"status": "unaffected",
"version": "6.12.103",
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{
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"version": "6.18.44",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "7.1.8",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
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"cpeMatch": [
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},
{
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nforcedeth: fix UAF of txrx_stats in nv_remove\n\nnv_remove() frees the per-CPU txrx_stats before unregister_netdev().\nUntil unregister completes, ndo_get_stats64, the NAPI/xmit data path,\nand nv_close()/drain may still access txrx_stats, leading to a\nuse-after-free.\n\nFree the stats only after unregister_netdev()."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - The UAF is opened in nv_remove() during local PCI/driver teardown (sysfs unbind, module unload, or hot-unplug); although NAPI/xmit and stats readers can run concurrently on still-registered netdev traffic, there is no standalone remote path into nv_remove itself.\nAC:L - Once teardown starts, unregister_netdev() deterministically calls nv_close()\u2192nv_drain_tx(), which increments freed txrx_stats when TX skbs remain, and an attacker can also drive the race by timing unbind against stats polling or packet I/O they control.\nPR:L - Privileged teardown opens the window, but unprivileged peers can supply the concurrent netdev access (rtnetlink/sysfs stats via nv_get_stats64, and RX/TX on the still-up interface) that performs the UAF; per CNA driver-removal UAF precedent and the higher-severity tiebreak, PR:L.\nUI:N - No separate victim action is required beyond routine driver removal or module unload on a live interface; monitoring daemons and network traffic can hit the freed stats automatically during the unregister window without user cooperation.\nS:U - Impact is kernel heap corruption and crash/privilege escalation within the host kernel security authority; it does not cross VM, hypervisor, IOMMU, or container sandbox boundaries.\nC:H - The bug is a kmalloc-backed per-CPU UAF: nv_get_stats64 reads freed nv_txrx_stats counters via per_cpu_ptr(), and once the slab is reallocated an attacker can obtain arbitrary kernel memory disclosure.\nI:H - Freed txrx_stats are updated from NAPI/xmit and nv_drain_tx() via __this_cpu_inc/add on attacker-influenced traffic, enabling heap grooming and controlled writes through the dangling per-CPU pointer for code execution.\nA:H - Use-after-free dereferences of txrx_stats during netdev teardown reliably cause kernel oops/panic (as in the fix description), and even unsuccessful exploitation still crashes the system when concurrent RX/TX or drain paths touch freed memory."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-19T16:38:39.684Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/cdf864d5d3c813ae1876f2bacc1cf3ac3c66dfc9"
},
{
"url": "https://git.kernel.org/stable/c/7c22b4ee0bd003cecfc14ca28981cb213e201f70"
},
{
"url": "https://git.kernel.org/stable/c/d51ce7a63b76eda02cabfed1b0cc277b2f5c9bcc"
},
{
"url": "https://git.kernel.org/stable/c/cf2dcde2284562ff87830ca0b7fa2b06e95aef1e"
},
{
"url": "https://git.kernel.org/stable/c/c9d24a205fd508b9999fcab6aca4c590490a12cf"
},
{
"url": "https://git.kernel.org/stable/c/ae20a8a4de06a289d40b0a0633d8d573f1fcb049"
},
{
"url": "https://git.kernel.org/stable/c/201e05aa531eba0dfe2ee05b4e178f6ffa12c8b1"
},
{
"url": "https://git.kernel.org/stable/c/22666ba1420164753d7b0f5a841986b25ace5435"
}
],
"title": "forcedeth: fix UAF of txrx_stats in nv_remove",
"x_generator": {
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}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-74548",
"datePublished": "2026-08-15T12:27:56.387Z",
"dateReserved": "2026-08-15T05:44:03.915Z",
"dateUpdated": "2026-08-19T16:38:39.684Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-74548",
"date": "2026-10-01",
"epss": "0.00171",
"percentile": "0.05814"
},
"microsoft_vex": {
"current_release_date": "2026-09-25T01:47:58.000Z",
"cve": "CVE-2026-74548",
"id": "msrc_CVE-2026-74548",
"initial_release_date": "2026-08-23T14:45:23.000Z",
"product_status:fixed": "1",
"product_status:known_affected": "1",
"source": "Microsoft CSAF VEX",
"status": "final",
"title": "forcedeth: fix UAF of txrx_stats in nv_remove",
"url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-74548.json",
"version": "3"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/net/ethernet/nvidia/forcedeth.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
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{
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"programFiles": [
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],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
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"version": "5.3"
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{
"lessThan": "5.3",
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},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.265",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.216",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
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"versionType": "semver"
},
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"version": "6.12.103",
"versionType": "semver"
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{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.44",
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{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.8",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
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}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nforcedeth: fix UAF of txrx_stats in nv_remove\n\nnv_remove() frees the per-CPU txrx_stats before unregister_netdev().\nUntil unregister completes, ndo_get_stats64, the NAPI/xmit data path,\nand nv_close()/drain may still access txrx_stats, leading to a\nuse-after-free.\n\nFree the stats only after unregister_netdev()."
}
],
"id": "CVE-2026-74548",
"lastModified": "2026-08-19T17:21:09.690",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9,
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary"
}
]
},
"published": "2026-08-15T13:18:00.170",
"references": [
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"url": "https://git.kernel.org/stable/c/201e05aa531eba0dfe2ee05b4e178f6ffa12c8b1"
},
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"url": "https://git.kernel.org/stable/c/22666ba1420164753d7b0f5a841986b25ace5435"
},
{
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"url": "https://git.kernel.org/stable/c/7c22b4ee0bd003cecfc14ca28981cb213e201f70"
},
{
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"url": "https://git.kernel.org/stable/c/ae20a8a4de06a289d40b0a0633d8d573f1fcb049"
},
{
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"url": "https://git.kernel.org/stable/c/c9d24a205fd508b9999fcab6aca4c590490a12cf"
},
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"url": "https://git.kernel.org/stable/c/cdf864d5d3c813ae1876f2bacc1cf3ac3c66dfc9"
},
{
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"url": "https://git.kernel.org/stable/c/cf2dcde2284562ff87830ca0b7fa2b06e95aef1e"
},
{
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"url": "https://git.kernel.org/stable/c/d51ce7a63b76eda02cabfed1b0cc277b2f5c9bcc"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Received"
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-08-21T11:33:26+00:00",
"cve": "CVE-2026-74548",
"id": "CVE-2026-74548",
"initial_release_date": "2026-08-15T00:00:00+00:00",
"product_status:known_not_affected": "274",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: forcedeth: fix UAF of txrx_stats in nv_remove",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74548.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "important",
"current_release_date": "2026-09-23T00:17:37Z",
"cve": "CVE-2026-74548",
"id": "CVE-2026-74548",
"initial_release_date": "2026-08-15T23:50:32Z",
"product_status:first_fixed": "68",
"product_status:known_affected": "659",
"product_status:known_not_affected": "6",
"product_status:recommended": "130",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-74548",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-74548.json",
"version": "14"
}
}
}
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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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