CVE-2023-52790

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Transient pool can be\nsmaller than IO_TLB_SEGSIZE, but the free list is initialized with the\nassumption that the total number of slots is a multiple of IO_TLB_SEGSIZE.\nAs a result, swiotlb_area_find_slots() may allocate slots past the end of\na transient IO TLB buffer."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerable code is in the kernel DMA/swiotlb allocator, reached when drivers call dma_map/swiotlb_tbl_map_single for I/O (including NIC RX/TX on untrusted PCI devices), which requires local ability to stimulate device DMA rather than a network-bound protocol parser.\nAC:L - Once CONFIG_SWIOTLB_DYNAMIC is enabled and SWIOTLB is under pressure, the reporter showed TCP/IP workloads on an untrusted VF reliably create transient pools and hit the unaligned >=PAGE_SIZE path that overruns the buffer; the attacker can induce that load.\nPR:L - An unprivileged local user can trigger DMA mapping through ordinary network or storage I/O that causes drivers to bounce via swiotlb; no root or CAP_* beyond normal user access is required.\nUI:N - Exploitation does not require a victim to perform any action such as mounting a filesystem or opening a crafted file; generating I/O is sufficient.\nS:C - On the iommu_dma_map_page path for untrusted PCI devices, an overrun bounce address is passed to iommu_map, mapping physical pages outside the SWIOTLB pool into the device IOVA space and bypassing the IOMMU/DMA isolation boundary.\nC:H - Out-of-bounds slot metadata writes and bounce/DMA access past the transient pool expose adjacent kernel or host physical memory, yielding a high-impact disclosure primitive.\nI:H - The bug is a confirmed out-of-bounds write (CWE-787) into slots[] and past the TLB buffer, and device DMA to wrongly IOMMU-mapped pages enables arbitrary modification of adjacent memory and control-flow corruption.\nA:H - Overrunning the transient pool corrupts kernel memory and can crash or hang the system, as seen when the mis-sized bounce buffer is used for DMA and CPU-side bounce/memset."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/dma/swiotlb.c"], "versions": [{"version": "79636caad3618e2b38457f6e298c9b31ba82b489", "lessThan": "ce7612496a4ba6068bc68aa1fa9d947dadb4ad9b", "status": "affected", "versionType": "git"}, {"version": "79636caad3618e2b38457f6e298c9b31ba82b489", "lessThan": "53c87e846e335e3c18044c397cc35178163d7827", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/dma/swiotlb.c"], "versions": [{"version": "6.6", "status": "affected"}, {"version": "0", "lessThan": "6.6", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.3", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.7", "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": "6.6", "versionEndExcluding": "6.6.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.7"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ce7612496a4ba6068bc68aa1fa9d947dadb4ad9b"}, {"url": "https://git.kernel.org/stable/c/53c87e846e335e3c18044c397cc35178163d7827"}], "title": "swiotlb: fix out-of-bounds TLB allocations with CONFIG_SWIOTLB_DYNAMIC", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2023-52790", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-05-22T19:32:04.825201Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-04T17:23:14.167Z"}}, {"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T23:11:36.050Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/ce7612496a4ba6068bc68aa1fa9d947dadb4ad9b", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/53c87e846e335e3c18044c397cc35178163d7827", "tags": ["x_transferred"]}]}]}}

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{"bugzilla": {"description": "kernel: swiotlb: fix out-of-bounds TLB allocations with CONFIG_SWIOTLB_DYNAMIC", "id": "2282634", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2282634"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nswiotlb: fix out-of-bounds TLB allocations with CONFIG_SWIOTLB_DYNAMIC\nLimit the free list length to the size of the IO TLB. Transient pool can be\nsmaller than IO_TLB_SEGSIZE, but the free list is initialized with the\nassumption that the total number of slots is a multiple of IO_TLB_SEGSIZE.\nAs a result, swiotlb_area_find_slots() may allocate slots past the end of\na transient IO TLB buffer."], "name": "CVE-2023-52790", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-05-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-52790\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-52790\nhttps://lore.kernel.org/linux-cve-announce/2024052156-CVE-2023-52790-2a4f@gregkh/T"], "threat_severity": "Low"}

{"created": "2025-07-12T22:10:06.298987+00:00", "updated": "2025-07-12T22:10:06.299045+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}