CVE-2026-68411 (GCVE-0-2026-68411)
Vulnerability from cvelistv5
Published
2026-08-10 12:04
Modified
2026-08-19 16:35
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
wifi: mac80211_hwsim: clamp virtio RX length before skb_put
hwsim_virtio_rx_work() passes the virtqueue used-ring length reported by
the device straight to skb_put() on a fixed-size receive skb. A backend
reporting a length larger than the skb tailroom drives skb_put() past the
buffer end and hits skb_over_panic() -- a host-triggerable guest panic
(denial of service).
Clamp the length to the skb's available room before skb_put(). A
conforming device never reports more than the posted buffer size, so valid
frames are unaffected; a truncated over-report then fails the
length/header checks in hwsim_virtio_handle_cmd() and is dropped, so
truncating rather than dropping here cannot be turned into a parsing
problem.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 5d44fe7c9808c56e136e59147bd932f5491520f1 Version: 5d44fe7c9808c56e136e59147bd932f5491520f1 Version: 5d44fe7c9808c56e136e59147bd932f5491520f1 Version: 5d44fe7c9808c56e136e59147bd932f5491520f1 Version: 5d44fe7c9808c56e136e59147bd932f5491520f1 Version: 5d44fe7c9808c56e136e59147bd932f5491520f1 Version: 5d44fe7c9808c56e136e59147bd932f5491520f1 Version: 5d44fe7c9808c56e136e59147bd932f5491520f1 |
||
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/net/wireless/virtual/mac80211_hwsim_main.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "7f9d678b870fca8eaf1d46fa915cba0b1d5b387a",
"status": "affected",
"version": "5d44fe7c9808c56e136e59147bd932f5491520f1",
"versionType": "git"
},
{
"lessThan": "909573d6a9b67354fc0515952574564e7c909c62",
"status": "affected",
"version": "5d44fe7c9808c56e136e59147bd932f5491520f1",
"versionType": "git"
},
{
"lessThan": "5779e4a33e1666ddfeba43e96e29c4a9e5254ff0",
"status": "affected",
"version": "5d44fe7c9808c56e136e59147bd932f5491520f1",
"versionType": "git"
},
{
"lessThan": "82c5a30a66e2a7337d99476c67d6fc1a99c4250e",
"status": "affected",
"version": "5d44fe7c9808c56e136e59147bd932f5491520f1",
"versionType": "git"
},
{
"lessThan": "fade308845c89f784da8a6780c1e77258488f1b6",
"status": "affected",
"version": "5d44fe7c9808c56e136e59147bd932f5491520f1",
"versionType": "git"
},
{
"lessThan": "6dc76371a9a360c29de00df5b11563102d9d675a",
"status": "affected",
"version": "5d44fe7c9808c56e136e59147bd932f5491520f1",
"versionType": "git"
},
{
"lessThan": "99dc05c75acc3c8cde8d89c5371f4b569de5ac62",
"status": "affected",
"version": "5d44fe7c9808c56e136e59147bd932f5491520f1",
"versionType": "git"
},
{
"lessThan": "10a2b430f8f06ae14b9590b6f6faa6b588ef0654",
"status": "affected",
"version": "5d44fe7c9808c56e136e59147bd932f5491520f1",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/net/wireless/virtual/mac80211_hwsim_main.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.7"
},
{
"lessThan": "5.7",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"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.*",
"status": "unaffected",
"version": "6.6.148",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.101",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.42",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.6",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.265",
"versionStartIncluding": "5.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.216",
"versionStartIncluding": "5.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.183",
"versionStartIncluding": "5.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.148",
"versionStartIncluding": "5.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.101",
"versionStartIncluding": "5.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.42",
"versionStartIncluding": "5.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1.6",
"versionStartIncluding": "5.7",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2",
"versionStartIncluding": "5.7",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211_hwsim: clamp virtio RX length before skb_put\n\nhwsim_virtio_rx_work() passes the virtqueue used-ring length reported by\nthe device straight to skb_put() on a fixed-size receive skb. A backend\nreporting a length larger than the skb tailroom drives skb_put() past the\nbuffer end and hits skb_over_panic() -- a host-triggerable guest panic\n(denial of service).\n\nClamp the length to the skb\u0027s available room before skb_put(). A\nconforming device never reports more than the posted buffer size, so valid\nframes are unaffected; a truncated over-report then fails the\nlength/header checks in hwsim_virtio_handle_cmd() and is dropped, so\ntruncating rather than dropping here cannot be turned into a parsing\nproblem."
}
],
"providerMetadata": {
"dateUpdated": "2026-08-19T16:35:07.403Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/7f9d678b870fca8eaf1d46fa915cba0b1d5b387a"
},
{
"url": "https://git.kernel.org/stable/c/909573d6a9b67354fc0515952574564e7c909c62"
},
{
"url": "https://git.kernel.org/stable/c/5779e4a33e1666ddfeba43e96e29c4a9e5254ff0"
},
{
"url": "https://git.kernel.org/stable/c/82c5a30a66e2a7337d99476c67d6fc1a99c4250e"
},
{
"url": "https://git.kernel.org/stable/c/fade308845c89f784da8a6780c1e77258488f1b6"
},
{
"url": "https://git.kernel.org/stable/c/6dc76371a9a360c29de00df5b11563102d9d675a"
},
{
"url": "https://git.kernel.org/stable/c/99dc05c75acc3c8cde8d89c5371f4b569de5ac62"
},
{
"url": "https://git.kernel.org/stable/c/10a2b430f8f06ae14b9590b6f6faa6b588ef0654"
}
],
"title": "wifi: mac80211_hwsim: clamp virtio RX length before skb_put",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-68411",
"datePublished": "2026-08-10T12:04:31.532Z",
"dateReserved": "2026-07-30T09:28:09.391Z",
"dateUpdated": "2026-08-19T16:35:07.403Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…