{ "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" } } ] } }