CVE-2026-80646 (GCVE-0-2026-80646)
Vulnerability from cvelistv5
Published
2026-08-28 06:48
Modified
2026-08-29 06:21
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
ipv6: guard against possible NULL deref in __in6_dev_stats_get()
dev_get_by_index_rcu() could return NULL if the original physical
device is unregistered.
Found by Sashiko.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: e1ae5c2ea4783b1fd87be250f9fcc9d9e1a6ba3f Version: e1ae5c2ea4783b1fd87be250f9fcc9d9e1a6ba3f Version: e1ae5c2ea4783b1fd87be250f9fcc9d9e1a6ba3f Version: e1ae5c2ea4783b1fd87be250f9fcc9d9e1a6ba3f Version: e1ae5c2ea4783b1fd87be250f9fcc9d9e1a6ba3f Version: e1ae5c2ea4783b1fd87be250f9fcc9d9e1a6ba3f Version: e1ae5c2ea4783b1fd87be250f9fcc9d9e1a6ba3f Version: e1ae5c2ea4783b1fd87be250f9fcc9d9e1a6ba3f Version: a24963500a4ec921ce9c2597e0a584e44513afae Version: 4.19.291 ≤ |
||
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"include/net/addrconf.h"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
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"status": "affected",
"version": "e1ae5c2ea4783b1fd87be250f9fcc9d9e1a6ba3f",
"versionType": "git"
},
{
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},
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"status": "affected",
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"versionType": "git"
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{
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"status": "affected",
"version": "4.19.291",
"versionType": "semver"
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]
},
{
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"product": "Linux",
"programFiles": [
"include/net/addrconf.h"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.2"
},
{
"lessThan": "5.2",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.261",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.212",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.97",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "6.18.40",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.5",
"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": "5.10.261",
"versionStartIncluding": "5.2",
"vulnerable": true
},
{
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{
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{
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{
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},
{
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"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: guard against possible NULL deref in __in6_dev_stats_get()\n\ndev_get_by_index_rcu() could return NULL if the original physical\ndevice is unregistered.\n\nFound by Sashiko."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.5,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:N - Remote attackers reach ipv6_frag_rcv() through the standard IPv6 receive and local-delivery path (ipv6_rcv to ip6_protocol_deliver_rcu) by sending fragmented IPv6 packets to an Internet-facing host running IPv6 reassembly on a VRF/L3-master ingress path.\nAC:L - An attacker can repeatedly deliver IPv6 fragments and time them against concurrent netdev unregister (link teardown, container veth removal, or ip link del with CAP_NET_ADMIN in a user namespace), controlling both sides of the race rather than depending on uncontrollable layout.\nPR:N - Sending unauthenticated IPv6 fragments requires no kernel credentials; VRF/L3-master configuration is a deployment condition on routers and cloud hosts, not a privilege the attacker must hold to deliver the triggering traffic.\nUI:N - Exploitation needs only network delivery of fragmented IPv6 packets during interface teardown; no victim action such as opening files, clicking links, or mounting filesystems is required.\nS:U - The NULL dereference crashes the kernel on the receiving host but does not cross a VM, container, or IOMMU security boundary; impact stays within the same kernel security authority.\nC:N - The failure is a NULL pointer read in __in6_dev_get(NULL) after dev_get_by_index_rcu() returns NULL; there is no use-after-free, out-of-bounds read, or other information-disclosure primitive.\nI:N - The bug dereferences a NULL net_device pointer for statistics lookup only; it provides no memory write, corruption, or control-flow hijack primitive beyond crashing the kernel.\nA:H - The NULL dereference during IPv6 fragment receive/reassembly processing in softirq context causes a kernel OOPS or panic, fully denying availability on the affected system until reboot."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-29T06:21:41.550Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/a23f2c68c6635e41404f189f8f7ae910738cebdb"
},
{
"url": "https://git.kernel.org/stable/c/e14db43677946bf2095febd294bb3c13ab375ab7"
},
{
"url": "https://git.kernel.org/stable/c/1a4adfbeb47a212a64539137411f1ca168474d33"
},
{
"url": "https://git.kernel.org/stable/c/1e3db30a88815bae6e9d5db6f64ac735e615a07e"
},
{
"url": "https://git.kernel.org/stable/c/952426a83ca75cea25c09d58944abafaa3ebd242"
},
{
"url": "https://git.kernel.org/stable/c/0db1949084e85a72d174a7dea3259b94fe5a9305"
},
{
"url": "https://git.kernel.org/stable/c/fc920c0659cdea5afd8721c1155a51564859e075"
},
{
"url": "https://git.kernel.org/stable/c/507541c2a8eeb76c02bd2511958f73a8cfa3e1bc"
}
],
"title": "ipv6: guard against possible NULL deref in __in6_dev_stats_get()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-80646",
"datePublished": "2026-08-28T06:48:56.277Z",
"dateReserved": "2026-08-26T14:34:25.779Z",
"dateUpdated": "2026-08-29T06:21:41.550Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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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.
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