{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2023-53034", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-03-27T16:40:15.758Z", "datePublished": "2025-04-16T14:11:41.985Z", "dateUpdated": "2026-08-05T09:12:28.373Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:12:28.373Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nntb_hw_switchtec: Fix shift-out-of-bounds in switchtec_ntb_mw_set_trans\n\nThere is a kernel API ntb_mw_clear_trans() would pass 0 to both addr and\nsize. This would make xlate_pos negative.\n\n[ 23.734156] switchtec switchtec0: MW 0: part 0 addr 0x0000000000000000 size 0x0000000000000000\n[ 23.734158] ================================================================================\n[ 23.734172] UBSAN: shift-out-of-bounds in drivers/ntb/hw/mscc/ntb_hw_switchtec.c:293:7\n[ 23.734418] shift exponent -1 is negative\n\nEnsuring xlate_pos is a positive or zero before BIT." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H", "baseScore": 7.1, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:A - In the highest reasonable Switchtec deployment, dual hosts share a PCIe NTB fabric; a peer link-down notifies ntb_transport, which calls ntb_free_mw → ntb_mw_clear_trans and hits the vulnerable path without needing local code execution on the victim.\nAC:L - Once ntb_transport has set up memory windows, bringing the NTB link down deterministically schedules link_cleanup and invokes clear_trans with addr=0/size=0; no race or uncontrolled layout is required.\nPR:N - A peer on the NTB fabric can force link-down and trigger cleanup without any account or capability on the victim host; local debugfs/module paths need root, but the peer path needs none.\nUI:N - Link-state handling and MW teardown run in kernel workqueues from the NTB event path; no separate victim user action is required after the NTB stack is in use.\nS:U - Impact stays in the local kernel/host authority; this is not a VM escape, IOMMU bypass, or other cross-boundary compromise.\nC:L - The undefined shift is used only inside IS_ALIGNED() and is not an out-of-bounds memory read; under the overestimate rule for UBSAN/UB shift faults, limited confidentiality impact is appropriate rather than None or High.\nI:N - The bad shift does not write kernel memory or reprogram windows with attacker-controlled data; on size==0 the function still takes the clear path, so there is no integrity/write primitive.\nA:H - UBSAN reports shift-out-of-bounds on this path, and with UBSAN_TRAP or panic_on_warn the fault becomes a kernel trap/panic, which is high availability impact." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/ntb/hw/mscc/ntb_hw_switchtec.c" ], "versions": [ { "version": "1e2fd202f8593985cdadca32e0c322f98e7fe7cb", "lessThan": "f56951f211f181410a383d305e8d370993e45294", "status": "affected", "versionType": "git" }, { "version": "1e2fd202f8593985cdadca32e0c322f98e7fe7cb", "lessThan": "5b6857bb3bfb0dae17fab1e42c1e82c204a508b1", "status": "affected", "versionType": "git" }, { "version": "1e2fd202f8593985cdadca32e0c322f98e7fe7cb", "lessThan": "2429bdf26a0f3950fdd996861e9c1a3873af1dbe", "status": "affected", "versionType": "git" }, { "version": "1e2fd202f8593985cdadca32e0c322f98e7fe7cb", "lessThan": "7ed22f8d8be26225a78cf5e85b2036421a6bf2d5", "status": "affected", "versionType": "git" }, { "version": "1e2fd202f8593985cdadca32e0c322f98e7fe7cb", "lessThan": "c61a3f2df162ba424be0141649a9ef5f28eaccc1", "status": "affected", "versionType": "git" }, { "version": "1e2fd202f8593985cdadca32e0c322f98e7fe7cb", "lessThan": "cb153bdc1812a3375639ed6ca5f147eaefb65349", "status": "affected", "versionType": "git" }, { "version": "1e2fd202f8593985cdadca32e0c322f98e7fe7cb", "lessThan": "36d32cfb00d42e865396424bb5d340fc0a28870d", "status": "affected", "versionType": "git" }, { "version": "1e2fd202f8593985cdadca32e0c322f98e7fe7cb", "lessThan": "0df2e03e4620548b41891b4e0d1bd9d2e0d8a39a", "status": "affected", "versionType": "git" }, { "version": "1e2fd202f8593985cdadca32e0c322f98e7fe7cb", "lessThan": "de203da734fae00e75be50220ba5391e7beecdf9", "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/ntb/hw/mscc/ntb_hw_switchtec.c" ], "versions": [ { "version": "4.16", "status": "affected" }, { "version": "0", "lessThan": "4.16", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.292", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.236", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.180", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.134", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.87", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.23", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.13.11", "lessThanOrEqual": "6.13.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.14.2", "lessThanOrEqual": "6.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.15", "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": "4.16", "versionEndExcluding": "5.4.292" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "5.10.236" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "5.15.180" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.1.134" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.6.87" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.12.23" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.13.11" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.14.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.15" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/f56951f211f181410a383d305e8d370993e45294" }, { "url": "https://git.kernel.org/stable/c/5b6857bb3bfb0dae17fab1e42c1e82c204a508b1" }, { "url": "https://git.kernel.org/stable/c/2429bdf26a0f3950fdd996861e9c1a3873af1dbe" }, { "url": "https://git.kernel.org/stable/c/7ed22f8d8be26225a78cf5e85b2036421a6bf2d5" }, { "url": "https://git.kernel.org/stable/c/c61a3f2df162ba424be0141649a9ef5f28eaccc1" }, { "url": "https://git.kernel.org/stable/c/cb153bdc1812a3375639ed6ca5f147eaefb65349" }, { "url": "https://git.kernel.org/stable/c/36d32cfb00d42e865396424bb5d340fc0a28870d" }, { "url": "https://git.kernel.org/stable/c/0df2e03e4620548b41891b4e0d1bd9d2e0d8a39a" }, { "url": "https://git.kernel.org/stable/c/de203da734fae00e75be50220ba5391e7beecdf9" } ], "title": "ntb_hw_switchtec: Fix shift-out-of-bounds in switchtec_ntb_mw_set_trans", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html" }, { "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T19:28:57.581Z" } }, { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2023-53034", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2026-06-10T20:41:32.295522Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-11T18:44:13.457Z" } } ] } }