{"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"}}]}}