{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-72355", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.921Z", "datePublished": "2026-08-15T05:55:56.812Z", "dateUpdated": "2026-08-17T05:43:13.252Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:43:13.252Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: Fix barriering when walking subrequest list\n\nFix the barriering used when walking the subrequest list in retry as\nthere's a possibility of seeing a subreq that's just been added by the\napplication thread."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL"}, "scenarios": [{"lang": "en", "value": "AV:N - The flaw is in the netfs client retry path used by SMB/CIFS, Ceph, NFS+fscache, and AFS; a remote malicious or MITM file server can trigger NEED_RETRY via short/error network responses during client read/write I/O.\nAC:L - The attacker controls both sides of the race by timing retry-inducing server responses and issuing concurrent reads/writes (multiple threads/fds); no victim-specific memory layout or rare uncontrollable state is required beyond normal mounted-FS I/O.\nPR:N - No local privileges on the victim are required; a remote attacker operating a malicious or compromised SMB/Ceph/NFS/AFS server can exploit any client with an active mount performing file I/O, without shell or admin access on the client.\nUI:N - On commonly pre-mounted enterprise/automounted network shares, kernel readahead and writeback can reach the buggy retry path without additional victim action at exploitation time beyond existing background file access.\nS:U - Exploitation corrupts the client kernel heap and enables local privilege escalation within the same kernel security domain; it does not by itself cross a VM/host or IOMMU boundary.\nC:H - Observing partially published subrequest entries yields stale start/len/flags/io_iter values, causing out-of-bounds kernel reads and information disclosure from adjacent memory via mis-sized iterators.\nI:H - Corrupted subrequest metadata drives wrong-span reissue_read/write, erroneous list deletion, and refcount manipulation, providing heap corruption primitives that can be leveraged for arbitrary kernel writes and code execution.\nA:H - Incorrect list traversal and mis-issued I/O can cause use-after-free, refcount underflow, kernel oops, or panic, reliably crashing or hanging the affected system."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/netfs/read_retry.c", "fs/netfs/write_retry.c"], "versions": [{"version": "288ace2f57c9d06dd2e42bd80d03747d879a4068", "lessThan": "be47c047250671c9225c0319ca4695be9b391c59", "status": "affected", "versionType": "git"}, {"version": "288ace2f57c9d06dd2e42bd80d03747d879a4068", "lessThan": "5c6ce05e406520290c1d89da97fb3cd70c09137d", "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/netfs/read_retry.c", "fs/netfs/write_retry.c"], "versions": [{"version": "6.10", "status": "affected"}, {"version": "0", "lessThan": "6.10", "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": "6.10", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/be47c047250671c9225c0319ca4695be9b391c59"}, {"url": "https://git.kernel.org/stable/c/5c6ce05e406520290c1d89da97fb3cd70c09137d"}], "title": "netfs: Fix barriering when walking subrequest list", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/netfs/read_retry.c", "fs/netfs/write_retry.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "be47c047250671c9225c0319ca4695be9b391c59", "status": "affected", "version": "288ace2f57c9d06dd2e42bd80d03747d879a4068", "versionType": "git"}, {"lessThan": "5c6ce05e406520290c1d89da97fb3cd70c09137d", "status": "affected", "version": "288ace2f57c9d06dd2e42bd80d03747d879a4068", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/netfs/read_retry.c", "fs/netfs/write_retry.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.10"}, {"lessThan": "6.10", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: Fix barriering when walking subrequest list\n\nFix the barriering used when walking the subrequest list in retry as\nthere's a possibility of seeing a subreq that's just been added by the\napplication thread."}], "id": "CVE-2026-72355", "lastModified": "2026-08-17T06:18:39.677", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-08-15T06:22:08.960", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5c6ce05e406520290c1d89da97fb3cd70c09137d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/be47c047250671c9225c0319ca4695be9b391c59"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

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