201 lines
9.9 KiB
JSON
201 lines
9.9 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2025-68246",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2025-12-16T13:41:40.264Z",
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"datePublished": "2025-12-16T14:21:23.551Z",
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"dateUpdated": "2026-08-05T12:10:26.942Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T12:10:26.942Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: close accepted socket when per-IP limit rejects connection\n\nWhen the per-IP connection limit is exceeded in ksmbd_kthread_fn(),\nthe code sets ret = -EAGAIN and continues the accept loop without\nclosing the just-accepted socket. That leaks one socket per rejected\nattempt from a single IP and enables a trivial remote DoS.\n\nRelease client_sk before continuing.\n\nThis bug was found with ZeroPath."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"baseScore": 7.5,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:N - The flaw is reachable remotely through IPv4 or IPv6 TCP connections to the ksmbd listener, normally port 445.\nAC:L - A single attacker can hold the per-IP quota and repeatedly complete additional TCP handshakes, with no race or condition outside the attacker's control.\nPR:N - The socket is leaked immediately after accept and before SMB negotiation, authentication, or credential validation.\nUI:N - Exploitation requires only attacker-initiated TCP connections and no action by a victim user.\nS:U - The vulnerable code and affected kernel and service resources remain within the host's existing security authority.\nC:N - The bug loses a reference to an allocated socket but does not expose memory or provide an out-of-bounds read or use-after-free primitive.\nI:N - No memory corruption, arbitrary write, or unauthorized data modification occurs.\nA:H - Repeated connections cause an unbounded and effectively unreclaimable kernel socket and inode leak, enabling complete ksmbd denial of service and potentially host-wide memory exhaustion."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/smb/server/transport_tcp.c"
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],
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"lessThan": "7a3c7154d5fc05956a8ad9e72ecf49e21555bfca",
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"status": "affected",
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"versionType": "git"
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},
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"version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
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"lessThan": "5746b2a0f5eb3d79667b3c51fe849bd62464220e",
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"status": "affected",
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"status": "affected",
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"status": "affected",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/smb/server/transport_tcp.c"
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],
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"versions": [
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{
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"version": "5.15",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "5.15",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.159",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.117",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.59",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.17.9",
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"lessThanOrEqual": "6.17.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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"nodes": [
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"operator": "OR",
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"negate": false,
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"versionStartIncluding": "5.15",
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"versionEndExcluding": "6.1.159"
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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]
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/7a3c7154d5fc05956a8ad9e72ecf49e21555bfca"
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},
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{
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"url": "https://git.kernel.org/stable/c/5746b2a0f5eb3d79667b3c51fe849bd62464220e"
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},
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{
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"url": "https://git.kernel.org/stable/c/4587a7826be1ae0190dba10ff70b46bb0e3bc7d3"
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},
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{
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"url": "https://git.kernel.org/stable/c/35521b5a7e8a184548125f4530552101236dcda1"
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},
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{
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"url": "https://git.kernel.org/stable/c/98a5fd31cbf72d46bf18e50b3ab0ce86d5f319a9"
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}
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],
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"title": "ksmbd: close accepted socket when per-IP limit rejects connection",
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} |