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vuln-cve/data/2026/98xxx/CVE-2026-98947.json
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{
"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 [<ffffffff82be8d97>] __alloc_skb+0x287/0x330 net/core/skbuff.c:505\n [<ffffffffa114bcbd>] vmci_transport_recv_dgram_cb+0xbd/0x210 [vmw_vsock_vmci_transport]\n [<ffffffffa05072c6>] vmci_datagram_invoke_guest_handler+0x366/0x450 [vmw_vmci]\n [<ffffffffa050ad75>] vmci_dispatch_dgs+0x235/0x490 [vmw_vmci]\n [<ffffffffa050b025>] vmci_interrupt+0x55/0x290 [vmw_vmci]\n [<ffffffff8137ad2b>] irq_thread_fn+0x8b/0x1a0 kernel/irq/manage.c:1205\n [<ffffffff8137c7ae>] irq_thread+0x28e/0x530 kernel/irq/manage.c:1314\n [<ffffffff81253dd6>] kthread+0x2e6/0x3a0 kernel/kthread.c:376\n [<ffffffff81004392>] 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"
}
}
}
}
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