CVE-2026-72378 (GCVE-0-2026-72378)
Vulnerability from cvelistv5
Published
2026-08-15 05:56
Modified
2026-08-17 05:43
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
afs: Fix error code in afs_extract_vl_addrs()
The error codes on these paths are only set on the first iteration
through the loop. Set the correct error code on every iteration.
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Version: 0a5143f2f89cc88d8a3eada8e8ccd86c1e988257 Version: 0a5143f2f89cc88d8a3eada8e8ccd86c1e988257 Version: 0a5143f2f89cc88d8a3eada8e8ccd86c1e988257 Version: 0a5143f2f89cc88d8a3eada8e8ccd86c1e988257 Version: 0a5143f2f89cc88d8a3eada8e8ccd86c1e988257 Version: 0a5143f2f89cc88d8a3eada8e8ccd86c1e988257 Version: 0a5143f2f89cc88d8a3eada8e8ccd86c1e988257 Version: 0a5143f2f89cc88d8a3eada8e8ccd86c1e988257 |
||
{
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{
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{
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"versionType": "original_commit_for_fix"
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],
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nafs: Fix error code in afs_extract_vl_addrs()\n\nThe error codes on these paths are only set on the first iteration\nthrough the loop. Set the correct error code on every iteration."
}
],
"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 - Malformed data reaches afs_extract_vl_addrs() from DNS AFSDB server-list replies fetched over the network via dns_query()/request_key upcall during afs_dns_query() cell VL lookups and periodic TTL refresh.\nAC:L - An attacker who can supply the DNS server-list payload can reliably trigger the bug by encoding two or more addresses with a valid first entry and a truncated second IPv4/IPv6 record, forcing the stale ret=0 error path on iteration two or later.\nPR:N - No local account or kernel capabilities are required on the victim; a network-positioned attacker can deliver the malicious binary DNS server-list response whenever the kAFS client resolves an AFSDB record for a targeted cell name.\nUI:N - Exploitation does not require victim interaction at trigger time because kAFS automatically re-queries DNS on cell setup and TTL expiry through afs_update_cell(), so a poisoned response can crash the kernel without further user action.\nS:U - The flaw is a kernel NULL-pointer dereference in AFS DNS parsing that crashes the local host; it does not cross a VM, container, or IOMMU security boundary to affect a different authority.\nC:N - The failure mode is returning ERR_PTR(0) after freeing the address list, causing a NULL dereference in the caller; there is no out-of-bounds read, use-after-free reuse, or other memory disclosure primitive.\nI:N - Impact is limited to a kernel oops from writing addrs-\u003esource on a NULL pointer after a parse error is mishandled; no attacker-controlled memory corruption or arbitrary write primitive is established.\nA:H - The NULL pointer dereference in afs_extract_vlserver_list() runs in the kAFS cell manager workqueue during DNS parsing and causes a kernel oops or panic, fully denying system availability."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T05:43:29.813Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/7ce6737a975ea3e0dc2e5946628d233779ca0caf"
},
{
"url": "https://git.kernel.org/stable/c/4e0b047848a855f2c933a6439f76a01743ba5620"
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{
"url": "https://git.kernel.org/stable/c/f70fbf2b974b63a7042705c2b0464cb8c97e9f34"
},
{
"url": "https://git.kernel.org/stable/c/9ad9016e3333c3c1f9284a253ff0658369e07aac"
},
{
"url": "https://git.kernel.org/stable/c/cb33dd2968588c78fad78dec19f61cabe5785494"
},
{
"url": "https://git.kernel.org/stable/c/8530206911fd66ad739ca5ce95f1d069f3d42204"
},
{
"url": "https://git.kernel.org/stable/c/bdcd80ff12939d172043fac5eb822b92366a1bab"
},
{
"url": "https://git.kernel.org/stable/c/4897cb71d4ab1f7e1a214adb1e4b80176702368d"
}
],
"title": "afs: Fix error code in afs_extract_vl_addrs()",
"x_generator": {
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}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-72378",
"datePublished": "2026-08-15T05:56:11.641Z",
"dateReserved": "2026-08-09T03:40:39.922Z",
"dateUpdated": "2026-08-17T05:43:29.813Z",
"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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