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vuln-cve/data/2023/53xxx/CVE-2023-53335.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2023-53335",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2025-09-16T16:08:59.565Z",
"datePublished": "2025-09-17T14:56:29.672Z",
"dateUpdated": "2026-08-05T09:13:34.431Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-08-05T09:13:34.431Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/cxgb4: Fix potential null-ptr-deref in pass_establish()\n\nIf get_ep_from_tid() fails to lookup non-NULL value for ep, ep is\ndereferenced later regardless of whether it is empty.\nThis patch adds a simple sanity check to fix the issue.\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE."
}
],
"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 - pass_establish() runs on CPL_PASS_ESTABLISH from the Chelsio TOE after a remote TCP peer completes the handshake to an iw_cxgb4 iWARP listener (c4iw_uld_rx_handler → sched → workqueue), so a network peer drives the path over TCP/IP with no local access.\nAC:L - The atomic tid-table design expects CPLs after ep removal, and a remote peer that connects then aborts can force peer_abort() to release_ep_resources() while PASS_ESTABLISH is still queued, reliably producing the NULL lookup the other handlers already guard against.\nPR:N - PASS_ESTABLISH is raised at TCP establish time, before MPA/RDMA authentication, so an unauthenticated remote peer only needs to reach an already-listening iWARP port—no local account or credentials.\nUI:N - The attacker opens and aborts connections itself against an already-listening RDMA/iWARP service; no separate victim action is required at exploit time.\nS:U - The resulting kernel oops/panic stays within the host kernel security authority and does not cross a VM, IOMMU, or sandbox boundary.\nC:N - This is a pure NULL pointer dereference of a failed get_ep_from_tid() result (address 0), with no out-of-bounds read, UAF of a dangling object, or other disclosure primitive.\nI:N - The fault is a NULL read with no memory write, type confusion, or control-flow hijack path beyond the ensuing oops.\nA:H - Dereferencing the NULL ep (ep->hwtid / ep->snd_seq) causes a kernel oops/panic in the iw_cxgb4 workqueue context, which a remote peer can trigger repeatedly for full denial of service."
}
]
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/infiniband/hw/cxgb4/cm.c"
],
"versions": [
{
"version": "944661dd97f4f257cd914fffec7eb80832ff9141",
"lessThan": "9dca64042d855a24b0bd81ce242e5dc7e939f6eb",
"status": "affected",
"versionType": "git"
},
{
"version": "944661dd97f4f257cd914fffec7eb80832ff9141",
"lessThan": "2cfc00e974d75a3aa8155f2660f57d342e1f67ca",
"status": "affected",
"versionType": "git"
},
{
"version": "944661dd97f4f257cd914fffec7eb80832ff9141",
"lessThan": "9ddc77eefb2a567b705c3c86ab2ddabe43cadf1b",
"status": "affected",
"versionType": "git"
},
{
"version": "944661dd97f4f257cd914fffec7eb80832ff9141",
"lessThan": "283861a4c52c1ea4df3dd1b6fc75a50796ce3524",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/infiniband/hw/cxgb4/cm.c"
],
"versions": [
{
"version": "4.7",
"status": "affected"
},
{
"version": "0",
"lessThan": "4.7",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.99",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.16",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.2.3",
"lessThanOrEqual": "6.2.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.3",
"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": "4.7",
"versionEndExcluding": "5.15.99"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.7",
"versionEndExcluding": "6.1.16"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.7",
"versionEndExcluding": "6.2.3"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "4.7",
"versionEndExcluding": "6.3"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/9dca64042d855a24b0bd81ce242e5dc7e939f6eb"
},
{
"url": "https://git.kernel.org/stable/c/2cfc00e974d75a3aa8155f2660f57d342e1f67ca"
},
{
"url": "https://git.kernel.org/stable/c/9ddc77eefb2a567b705c3c86ab2ddabe43cadf1b"
},
{
"url": "https://git.kernel.org/stable/c/283861a4c52c1ea4df3dd1b6fc75a50796ce3524"
}
],
"title": "RDMA/cxgb4: Fix potential null-ptr-deref in pass_establish()",
"x_generator": {
"engine": "bippy-1.2.0"
}
},
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 5.5,
"attackVector": "LOCAL",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "NONE"
}
},
{
"other": {
"type": "ssvc",
"content": {
"id": "CVE-2023-53335",
"role": "CISA Coordinator",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2026-01-14T18:37:23.151348Z"
}
}
}
],
"problemTypes": [
{
"descriptions": [
{
"lang": "en",
"type": "CWE",
"cweId": "CWE-476",
"description": "CWE-476 NULL Pointer Dereference"
}
]
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-01-14T18:43:00.832Z"
}
}
]
}
}