{"id":"CVE-2026-98947","revision":"0754a4b4076e4585a554971c8b884381","records":[{"revision":"0754a4b4076e4585a554971c8b884381","observedAt":"2026-10-23T16:01:20.601+00:00","statement":{"source":"cve-program","id":"CVE-2026-98947","aliases":[],"title":"vsock: Fix memory leak in vmci_transport_recv_dgram_cb()","description":"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.","state":0,"publishedAt":"2026-10-23T12:19:06.146+00:00","modifiedAt":"2026-10-23T12:19:06.146+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"net/vmw_vsock/af_vsock.c\"\n ],\n \"versions\": [\n {\n \"version\": \"d021c344051af91f42c5ba9fdedc176740cbd238\",\n \"lessThan\": \"0f8e2b2045355a0ee2008125e573435504b13cee\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"d021c344051af91f42c5ba9fdedc176740cbd238\",\n \"lessThan\": \"4835dbcde5cc3ae37e0d0796052056b35fcae8bf\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"d021c344051af91f42c5ba9fdedc176740cbd238\",\n \"lessThan\": \"9907db2b8e7ba70b442bb9dec86526a6511fac62\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"d021c344051af91f42c5ba9fdedc176740cbd238\",\n \"lessThan\": \"7c24a4e87e219072e5e106f6791146cbf3b056b3\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"net/vmw_vsock/af_vsock.c\"\n ],\n \"versions\": [\n {\n \"version\": \"3.9\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"3.9\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.113\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.57\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.2.11\",\n \"lessThanOrEqual\": \"7.2.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.3\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/0f8e2b2045355a0ee2008125e573435504b13cee","https://git.kernel.org/stable/c/4835dbcde5cc3ae37e0d0796052056b35fcae8bf","https://git.kernel.org/stable/c/9907db2b8e7ba70b442bb9dec86526a6511fac62","https://git.kernel.org/stable/c/7c24a4e87e219072e5e106f6791146cbf3b056b3"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98947","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98947","identifiers":["CVE-2026-98947"]},"retained":false,"historicalAffected":[]}],"coverage":[]}