{ "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": [ { "version": "0a5143f2f89cc88d8a3eada8e8ccd86c1e988257", "lessThan": "7ce6737a975ea3e0dc2e5946628d233779ca0caf", "status": "affected", "versionType": "git" }, { "version": "0a5143f2f89cc88d8a3eada8e8ccd86c1e988257", "lessThan": "4e0b047848a855f2c933a6439f76a01743ba5620", "status": "affected", "versionType": "git" }, { "version": "0a5143f2f89cc88d8a3eada8e8ccd86c1e988257", "lessThan": "f70fbf2b974b63a7042705c2b0464cb8c97e9f34", "status": "affected", "versionType": "git" }, { "version": "0a5143f2f89cc88d8a3eada8e8ccd86c1e988257", "lessThan": "9ad9016e3333c3c1f9284a253ff0658369e07aac", "status": "affected", "versionType": "git" }, { "version": "0a5143f2f89cc88d8a3eada8e8ccd86c1e988257", "lessThan": "cb33dd2968588c78fad78dec19f61cabe5785494", "status": "affected", "versionType": "git" }, { "version": "0a5143f2f89cc88d8a3eada8e8ccd86c1e988257", "lessThan": "8530206911fd66ad739ca5ce95f1d069f3d42204", "status": "affected", "versionType": "git" }, { "version": "0a5143f2f89cc88d8a3eada8e8ccd86c1e988257", "lessThan": "bdcd80ff12939d172043fac5eb822b92366a1bab", "status": "affected", "versionType": "git" }, { "version": "0a5143f2f89cc88d8a3eada8e8ccd86c1e988257", "lessThan": "4897cb71d4ab1f7e1a214adb1e4b80176702368d", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "fs/afs/vl_list.c" ], "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" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "5.15.212" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "6.1.178" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "6.6.145" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "6.12.97" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "6.18.40" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "7.1.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "7.2" } ] } ] } ], "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" }, { "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" } } } }