{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-37757", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:23.938Z", "datePublished": "2025-05-01T12:56:01.195Z", "dateUpdated": "2026-08-05T11:57:20.227Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:57:20.227Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: fix memory leak in tipc_link_xmit\n\nIn case the backlog transmit queue for system-importance messages is overloaded,\ntipc_link_xmit() returns -ENOBUFS but the skb list is not purged. This leads to\nmemory leak and failure when a skb is allocated.\n\nThis commit fixes this issue by purging the skb list before tipc_link_xmit()\nreturns." } ], "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 - The leak is driven through the TIPC link transmit path, reachable from a remote peer node over the routable UDP bearer (port 6118) or an Ethernet bearer, since incoming messages to unknown ports generate SYSTEM-importance reject messages via tipc_sk_rcv()/tipc_msg_reverse() that flow into tipc_link_xmit(). TIPC packet processing is network-facing net/ stack code, so AV:N applies.\nAC:L - The attacker controls both sides of the condition: it generates the SYSTEM-importance messages (flooding closed ports, or publishing names) and, as the link peer, controls the drain rate by withholding link acknowledgements, so overflowing backlog[TIPC_SYSTEM_IMPORTANCE] (limit ~873 packets at 1500 MTU) is reliably reproducible.\nPR:N - TIPC performs no peer authentication by default — neighbour discovery auto-admits unknown nodes (tipc_udp_rcast_add) and TIPC_CRYPTO requires out-of-band key configuration — so an unauthenticated node reaching the bearer can trigger this. Even on the purely local path, net/tipc has no capable() checks outside netlink_compat.c, so any unprivileged user suffices.\nUI:N - Triggering only requires sending TIPC traffic or performing socket operations; no action by any local user or administrator is needed.\nS:U - The leaked memory and the resulting exhaustion are confined to the kernel of the affected host, with no crossing of a VM, IOMMU, or other security authority boundary.\nC:N - The bug orphans skbs that are never read or exposed; there is no out-of-bounds read, uninitialized-memory disclosure, or use-after-free that could yield attacker-visible data.\nI:N - No memory is corrupted or overwritten — the skbs are simply never freed — so no kernel or user data is modified by the flaw.\nA:H - The leak is unbounded and attacker-paced: full-MTU skbs are leaked permanently at flood rate, exhausting kernel memory and causing system-wide allocation failures and OOM, and each overflow additionally forces tipc_node_link_down(), resetting the link and denying TIPC cluster connectivity." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/tipc/link.c" ], "versions": [ { "version": "365ad353c2564bba8835290061308ba825166b3a", "lessThan": "84895f5ce3829d9fc030e5ec2d8729da4c0c9d08", "status": "affected", "versionType": "git" }, { "version": "365ad353c2564bba8835290061308ba825166b3a", "lessThan": "d4d40e437adb376be16b3a12dd5c63f0fa768247", "status": "affected", "versionType": "git" }, { "version": "365ad353c2564bba8835290061308ba825166b3a", "lessThan": "ed06675d3b8cd37120b447646d53f7cd3e6fcd63", "status": "affected", "versionType": "git" }, { "version": "365ad353c2564bba8835290061308ba825166b3a", "lessThan": "24e6280cdd7f8d01fc6b9b365fb800c2fb7ea9bb", "status": "affected", "versionType": "git" }, { "version": "365ad353c2564bba8835290061308ba825166b3a", "lessThan": "09c2dcda2c551bba30710c33f6ac678ae7395389", "status": "affected", "versionType": "git" }, { "version": "365ad353c2564bba8835290061308ba825166b3a", "lessThan": "7c5957f7905b4aede9d7a559d271438f3ca9e852", "status": "affected", "versionType": "git" }, { "version": "365ad353c2564bba8835290061308ba825166b3a", "lessThan": "d0e02d3d27a0b4dcb13f954f537ca1dd8f282dcf", "status": "affected", "versionType": "git" }, { "version": "365ad353c2564bba8835290061308ba825166b3a", "lessThan": "a40cbfbb8f95c325430f017883da669b2aa927d4", "status": "affected", "versionType": "git" }, { "version": "365ad353c2564bba8835290061308ba825166b3a", "lessThan": "69ae94725f4fc9e75219d2d69022029c5b24bc9a", "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/tipc/link.c" ], "versions": [ { "version": "4.11", "status": "affected" }, { "version": "0", "lessThan": "4.11", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.293", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.237", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.181", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.135", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.88", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.24", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.13.12", "lessThanOrEqual": "6.13.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.14.3", "lessThanOrEqual": "6.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.15", "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": "4.11", "versionEndExcluding": "5.4.293" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "5.10.237" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "5.15.181" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "6.1.135" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "6.6.88" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "6.12.24" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "6.13.12" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "6.14.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.11", "versionEndExcluding": "6.15" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/84895f5ce3829d9fc030e5ec2d8729da4c0c9d08" }, { "url": "https://git.kernel.org/stable/c/d4d40e437adb376be16b3a12dd5c63f0fa768247" }, { "url": "https://git.kernel.org/stable/c/ed06675d3b8cd37120b447646d53f7cd3e6fcd63" }, { "url": "https://git.kernel.org/stable/c/24e6280cdd7f8d01fc6b9b365fb800c2fb7ea9bb" }, { "url": "https://git.kernel.org/stable/c/09c2dcda2c551bba30710c33f6ac678ae7395389" }, { "url": "https://git.kernel.org/stable/c/7c5957f7905b4aede9d7a559d271438f3ca9e852" }, { "url": "https://git.kernel.org/stable/c/d0e02d3d27a0b4dcb13f954f537ca1dd8f282dcf" }, { "url": "https://git.kernel.org/stable/c/a40cbfbb8f95c325430f017883da669b2aa927d4" }, { "url": "https://git.kernel.org/stable/c/69ae94725f4fc9e75219d2d69022029c5b24bc9a" } ], "title": "tipc: fix memory leak in tipc_link_xmit", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html" }, { "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T19:54:31.835Z" } } ] } }