{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-98947", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.381Z", "datePublished": "2026-10-23T12:19:06.146Z", "dateUpdated": "2026-10-23T12:19:06.146Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-23T12:19:06.146Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvsock: Fix memory leak in vmci_transport_recv_dgram_cb()\n\nDuring the closure of a datagram socket, the vmci_transport_recv_dgram_cb()\nfunction may be called, which will add the packets\nto the socket's backlog; then, after the receive queue is cleared,\nthe __release_sock() function will move the packet back from the socket's\nbacklog to the receive queue, which will lead to a memory leak.\n\nsock_close\n __sock_release\n __vsock_release\n // take ownership by user-space\n lock_sock_nested\n sock_set_flag(sk, SOCK_DEAD)\n vmci_transport_release\n vmci_dispatch_dgs\n vmci_datagram_invoke_guest_handler\n vmci_transport_recv_dgram_cb\n sk_receive_skb\n if (!sock_owned_by_user(sk))\n [...]\n (!) else if sk_add_backlog()\n [...]\n (!) skb_queue_purge(&sk->sk_receive_queue)\n\n release_sock\n __release_sock\n // move all packets from the backlog\n // to the receive queue\n (!) sk_backlog_rcv\n vsock_queue_rcv_skb\n [...]\n __sock_queue_rcv_skb\n if (!sock_flag(sk, SOCK_DEAD))\n // Since the socket is \"dead\", the function will not\n // be called\n sk->sk_data_ready(sk)\n sock_release_ownership(sk);\n sock_put\n\nAdd a receive queue cleanup in the socket destructor to fix this.\n\nsyzkaller report:\n\nunreferenced object 0xffff8880117bfb80 (size 240):\n comm \"irq/56-vmw_vmci\", pid 205, jiffies 4295064448 (age 73.992s)\n hex dump (first 32 bytes):\n 78 dc 26 1e 80 88 ff ff 78 dc 26 1e 80 88 ff ff x.&.....x.&.....\n 00 00 00 00 00 00 00 00 c0 da 26 1e 80 88 ff ff ..........&.....\n backtrace:\n [] __alloc_skb+0x287/0x330 net/core/skbuff.c:505\n [] vmci_transport_recv_dgram_cb+0xbd/0x210 [vmw_vsock_vmci_transport]\n [] vmci_datagram_invoke_guest_handler+0x366/0x450 [vmw_vmci]\n [] vmci_dispatch_dgs+0x235/0x490 [vmw_vmci]\n [] vmci_interrupt+0x55/0x290 [vmw_vmci]\n [] irq_thread_fn+0x8b/0x1a0 kernel/irq/manage.c:1205\n [] irq_thread+0x28e/0x530 kernel/irq/manage.c:1314\n [] kthread+0x2e6/0x3a0 kernel/kthread.c:376\n [] ret_from_fork+0x22/0x30 arch/x86/entry/entry_64.S:295\n\nFound by InfoTeCS on behalf of Linux Verification Center\n(linuxtesting.org) with Syzkaller." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/vmw_vsock/af_vsock.c" ], "versions": [ { "version": "d021c344051af91f42c5ba9fdedc176740cbd238", "lessThan": "0f8e2b2045355a0ee2008125e573435504b13cee", "status": "affected", "versionType": "git" }, { "version": "d021c344051af91f42c5ba9fdedc176740cbd238", "lessThan": "4835dbcde5cc3ae37e0d0796052056b35fcae8bf", "status": "affected", "versionType": "git" }, { "version": "d021c344051af91f42c5ba9fdedc176740cbd238", "lessThan": "9907db2b8e7ba70b442bb9dec86526a6511fac62", "status": "affected", "versionType": "git" }, { "version": "d021c344051af91f42c5ba9fdedc176740cbd238", "lessThan": "7c24a4e87e219072e5e106f6791146cbf3b056b3", "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/vmw_vsock/af_vsock.c" ], "versions": [ { "version": "3.9", "status": "affected" }, { "version": "0", "lessThan": "3.9", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.113", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.57", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2.11", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.3", "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": "3.9", "versionEndExcluding": "6.12.113" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.9", "versionEndExcluding": "6.18.57" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.9", "versionEndExcluding": "7.2.11" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.9", "versionEndExcluding": "7.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/0f8e2b2045355a0ee2008125e573435504b13cee" }, { "url": "https://git.kernel.org/stable/c/4835dbcde5cc3ae37e0d0796052056b35fcae8bf" }, { "url": "https://git.kernel.org/stable/c/9907db2b8e7ba70b442bb9dec86526a6511fac62" }, { "url": "https://git.kernel.org/stable/c/7c24a4e87e219072e5e106f6791146cbf3b056b3" } ], "title": "vsock: Fix memory leak in vmci_transport_recv_dgram_cb()", "x_generator": { "engine": "bippy-1.2.0" } } } }