{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64059", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.030Z", "datePublished": "2026-07-19T15:39:39.607Z", "dateUpdated": "2026-07-19T15:39:39.607Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-19T15:39:39.607Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: Fix folio->private handling in netfs_perform_write()\n\nUnder some circumstances, netfs_perform_write() doesn't correctly\nmanipulate folio->private between NULL, NETFS_FOLIO_COPY_TO_CACHE, pointing\nto a group and pointing to a netfs_folio struct, leading to potential\nmultiple attachments of private data with associated folio ref leaks and\nalso leaks of netfs_folio structs or netfs_group refs.\n\nFix this by consolidating the place at which a folio is marked uptodate in\none place and having that look at what's attached to folio->private and\ndecide how to clean it up and then set the new group. Also, the content\nshouldn't be flushed if group is NULL, even if a group is specified in the\nnetfs_group parameter, as that would be the case for a new folio. A\nfilesystem should always specify netfs_group or never specify netfs_group.\n\nThe Sashiko auto-review tool noted that it was theoretically possible that\nthe fpos >= ctx->zero_point section might leak if it modified a streaming\nwrite folio. This is unlikely, but with a network filesystem, third party\nchanges can happen. It also pointed out that __netfs_set_group() would\nleak if called multiple times on the same folio from the \"whole folio\nmodify section\"."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/netfs/buffered_write.c", "include/trace/events/netfs.h"], "versions": [{"version": "8f52de0077ba3bf41e5d53d67a185700f41efce7", "lessThan": "7f040243c74d72b45b22246c7d9e621fbeab44ac", "status": "affected", "versionType": "git"}, {"version": "8f52de0077ba3bf41e5d53d67a185700f41efce7", "lessThan": "551b5c71ee312ca7646ddb605231c1016e8cbb18", "status": "affected", "versionType": "git"}, {"version": "8f52de0077ba3bf41e5d53d67a185700f41efce7", "lessThan": "0969ea8370bad0e4fb6131b6a7bed9e7ec522ac7", "status": "affected", "versionType": "git"}, {"version": "8f52de0077ba3bf41e5d53d67a185700f41efce7", "lessThan": "ccde2ac757c713535b224233a296de40efe5212d", "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/buffered_write.c", "include/trace/events/netfs.h"], "versions": [{"version": "6.12", "status": "affected"}, {"version": "0", "lessThan": "6.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.92", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.34", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.11", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "6.12", "versionEndExcluding": "6.12.92"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.18.34"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "7.0.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/7f040243c74d72b45b22246c7d9e621fbeab44ac"}, {"url": "https://git.kernel.org/stable/c/551b5c71ee312ca7646ddb605231c1016e8cbb18"}, {"url": "https://git.kernel.org/stable/c/0969ea8370bad0e4fb6131b6a7bed9e7ec522ac7"}, {"url": "https://git.kernel.org/stable/c/ccde2ac757c713535b224233a296de40efe5212d"}], "title": "netfs: Fix folio->private handling in netfs_perform_write()", "x_generator": {"engine": "bippy-1.2.0"}}}}

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