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vuln-cve/data/2026/72xxx/CVE-2026-72378.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-72378",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2026-08-09T03:40:39.922Z",
"datePublished": "2026-08-15T05:56:11.641Z",
"dateUpdated": "2026-08-17T05:43:29.813Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-08-17T05:43:29.813Z"
},
"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": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"baseScore": 7.5,
"baseSeverity": "HIGH"
},
"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->source 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."
}
]
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"fs/afs/vl_list.c"
],
"versions": [
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"lessThan": "7ce6737a975ea3e0dc2e5946628d233779ca0caf",
"status": "affected",
"versionType": "git"
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"status": "affected",
"versionType": "git"
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"lessThan": "f70fbf2b974b63a7042705c2b0464cb8c97e9f34",
"status": "affected",
"versionType": "git"
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"status": "affected",
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"status": "affected",
"versionType": "git"
},
{
"version": "0a5143f2f89cc88d8a3eada8e8ccd86c1e988257",
"lessThan": "bdcd80ff12939d172043fac5eb822b92366a1bab",
"status": "affected",
"versionType": "git"
},
{
"version": "0a5143f2f89cc88d8a3eada8e8ccd86c1e988257",
"lessThan": "4897cb71d4ab1f7e1a214adb1e4b80176702368d",
"status": "affected",
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]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
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],
"versions": [
{
"version": "4.20",
"status": "affected"
},
{
"version": "0",
"lessThan": "4.20",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.261",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.212",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.178",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.145",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.97",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.18.40",
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.1.5",
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.2",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.20",
"versionEndExcluding": "5.10.261"
},
{
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],
"references": [
{
"url": "https://git.kernel.org/stable/c/7ce6737a975ea3e0dc2e5946628d233779ca0caf"
},
{
"url": "https://git.kernel.org/stable/c/4e0b047848a855f2c933a6439f76a01743ba5620"
},
{
"url": "https://git.kernel.org/stable/c/f70fbf2b974b63a7042705c2b0464cb8c97e9f34"
},
{
"url": "https://git.kernel.org/stable/c/9ad9016e3333c3c1f9284a253ff0658369e07aac"
},
{
"url": "https://git.kernel.org/stable/c/cb33dd2968588c78fad78dec19f61cabe5785494"
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{
"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": {
"engine": "bippy-1.2.0"
}
}
}
}
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