{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2025-39827", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.140Z", "datePublished": "2025-09-16T13:00:25.555Z", "dateUpdated": "2025-09-16T13:00:25.555Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-09-16T13:00:25.555Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: rose: include node references in rose_neigh refcount\n\nCurrent implementation maintains two separate reference counting\nmechanisms: the 'count' field in struct rose_neigh tracks references from\nrose_node structures, while the 'use' field (now refcount_t) tracks\nreferences from rose_sock.\n\nThis patch merges these two reference counting systems using 'use' field\nfor proper reference management. Specifically, this patch adds incrementing\nand decrementing of rose_neigh->use when rose_neigh->count is incremented\nor decremented.\n\nThis patch also modifies rose_rt_free(), rose_rt_device_down() and\nrose_clear_route() to properly release references to rose_neigh objects\nbefore freeing a rose_node through rose_remove_node().\n\nThese changes ensure rose_neigh structures are properly freed only when\nall references, including those from rose_node structures, are released.\nAs a result, this resolves a slab-use-after-free issue reported by Syzbot."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/rose/rose_route.c"], "versions": [{"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "4cce478c3e82a5fc788d72adb2f4c4e983997639", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "9c547c8eee9d1cf6e744611d688b9f725cf9a115", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "d7563b456ed44151e1a82091d96f60166daea89b", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "384210cceb1873a4c8218b27ba0745444436b728", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "da9c9c877597170b929a6121a68dcd3dd9a80f45", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/rose/rose_route.c"], "versions": [{"version": "2.6.12", "status": "affected"}, {"version": "0", "lessThan": "2.6.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.150", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.104", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.45", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.16.5", "lessThanOrEqual": "6.16.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.17-rc4", "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": "2.6.12", "versionEndExcluding": "6.1.150"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.6.104"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.12.45"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.16.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.17-rc4"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/4cce478c3e82a5fc788d72adb2f4c4e983997639"}, {"url": "https://git.kernel.org/stable/c/9c547c8eee9d1cf6e744611d688b9f725cf9a115"}, {"url": "https://git.kernel.org/stable/c/d7563b456ed44151e1a82091d96f60166daea89b"}, {"url": "https://git.kernel.org/stable/c/384210cceb1873a4c8218b27ba0745444436b728"}, {"url": "https://git.kernel.org/stable/c/da9c9c877597170b929a6121a68dcd3dd9a80f45"}], "title": "net: rose: include node references in rose_neigh refcount", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: rose: include node references in rose_neigh refcount\n\nCurrent implementation maintains two separate reference counting\nmechanisms: the 'count' field in struct rose_neigh tracks references from\nrose_node structures, while the 'use' field (now refcount_t) tracks\nreferences from rose_sock.\n\nThis patch merges these two reference counting systems using 'use' field\nfor proper reference management. Specifically, this patch adds incrementing\nand decrementing of rose_neigh->use when rose_neigh->count is incremented\nor decremented.\n\nThis patch also modifies rose_rt_free(), rose_rt_device_down() and\nrose_clear_route() to properly release references to rose_neigh objects\nbefore freeing a rose_node through rose_remove_node().\n\nThese changes ensure rose_neigh structures are properly freed only when\nall references, including those from rose_node structures, are released.\nAs a result, this resolves a slab-use-after-free issue reported by Syzbot."}], "id": "CVE-2025-39827", "lastModified": "2025-09-17T14:18:55.093", "metrics": {}, "published": "2025-09-16T13:16:02.873", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/384210cceb1873a4c8218b27ba0745444436b728"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4cce478c3e82a5fc788d72adb2f4c4e983997639"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9c547c8eee9d1cf6e744611d688b9f725cf9a115"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d7563b456ed44151e1a82091d96f60166daea89b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/da9c9c877597170b929a6121a68dcd3dd9a80f45"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: net: rose: include node references in rose_neigh refcount", "id": "2395782", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2395782"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2025-39827", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-09-16T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-39827\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-39827\nhttps://lore.kernel.org/linux-cve-announce/2025091617-CVE-2025-39827-0c7c@gregkh/T"], "threat_severity": "Moderate"}