CVE-2026-23390

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-23390", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-01-13T15:37:46.008Z", "datePublished": "2026-03-25T10:29:02.768Z", "dateUpdated": "2026-05-11T22:05:57.103Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T22:05:57.103Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing/dma: Cap dma_map_sg tracepoint arrays to prevent buffer overflow\n\nThe dma_map_sg tracepoint can trigger a perf buffer overflow when\ntracing large scatter-gather lists. With devices like virtio-gpu\ncreating large DRM buffers, nents can exceed 1000 entries, resulting\nin:\n\n phys_addrs: 1000 * 8 bytes = 8,000 bytes\n dma_addrs: 1000 * 8 bytes = 8,000 bytes\n lengths: 1000 * 4 bytes = 4,000 bytes\n Total: ~20,000 bytes\n\nThis exceeds PERF_MAX_TRACE_SIZE (8192 bytes), causing:\n\n WARNING: CPU: 0 PID: 5497 at kernel/trace/trace_event_perf.c:405\n perf buffer not large enough, wanted 24620, have 8192\n\nCap all three dynamic arrays at 128 entries using min() in the array\nsize calculation. This ensures arrays are only as large as needed\n(up to the cap), avoiding unnecessary memory allocation for small\noperations while preventing overflow for large ones.\n\nThe tracepoint now records the full nents/ents counts and a truncated\nflag so users can see when data has been capped.\n\nChanges in v2:\n- Use min(nents, DMA_TRACE_MAX_ENTRIES) for dynamic array sizing\n instead of fixed DMA_TRACE_MAX_ENTRIES allocation (feedback from\n Steven Rostedt)\n- This allocates only what's needed up to the cap, avoiding waste\n for small operations\n\nReviwed-by: Sean Anderson <sean.anderson@linux.dev>"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/trace/events/dma.h"], "versions": [{"version": "038eb433dc1474c4bc7d33188294e3d4778efdfd", "lessThan": "02d209bb018a40dee9eac89e91860253dee9605b", "status": "affected", "versionType": "git"}, {"version": "038eb433dc1474c4bc7d33188294e3d4778efdfd", "lessThan": "f2584f791a10343bdc995ff6ff402db45b95de69", "status": "affected", "versionType": "git"}, {"version": "038eb433dc1474c4bc7d33188294e3d4778efdfd", "lessThan": "daafcc0ef0b358d9d622b6e3b7c43767aa3814ee", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/trace/events/dma.h"], "versions": [{"version": "6.12", "status": "affected"}, {"version": "0", "lessThan": "6.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.74", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.13", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19", "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": "6.12", "versionEndExcluding": "6.12.74"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.18.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.19"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/02d209bb018a40dee9eac89e91860253dee9605b"}, {"url": "https://git.kernel.org/stable/c/f2584f791a10343bdc995ff6ff402db45b95de69"}, {"url": "https://git.kernel.org/stable/c/daafcc0ef0b358d9d622b6e3b7c43767aa3814ee"}], "title": "tracing/dma: Cap dma_map_sg tracepoint arrays to prevent buffer overflow", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["include/trace/events/dma.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "02d209bb018a40dee9eac89e91860253dee9605b", "status": "affected", "version": "038eb433dc1474c4bc7d33188294e3d4778efdfd", "versionType": "git"}, {"lessThan": "f2584f791a10343bdc995ff6ff402db45b95de69", "status": "affected", "version": "038eb433dc1474c4bc7d33188294e3d4778efdfd", "versionType": "git"}, {"lessThan": "daafcc0ef0b358d9d622b6e3b7c43767aa3814ee", "status": "affected", "version": "038eb433dc1474c4bc7d33188294e3d4778efdfd", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["include/trace/events/dma.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.12"}, {"lessThan": "6.12", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.74", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.13", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.19", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "3D530012-C124-4425-AC28-91B8FACB2151", "versionEndExcluding": "6.12.74", "versionStartIncluding": "6.12.1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "6BDEF9FB-423E-49F6-991B-9277CC3AF400", "versionEndExcluding": "6.18.13", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:-:*:*:*:*:*:*", "matchCriteriaId": "0E698080-7669-4132-8817-4C674EEBCE54", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*", "matchCriteriaId": "17B67AA7-40D6-4AFA-8459-F200F3D7CFD1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*", "matchCriteriaId": "C47E4CC9-C826-4FA9-B014-7FE3D9B318B2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*", "matchCriteriaId": "F71D92C0-C023-48BD-B3B6-70B638EEE298", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*", "matchCriteriaId": "13580667-0A98-40CC-B29F-D12790B91BDB", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*", "matchCriteriaId": "CAD1FED7-CF48-47BF-AC7D-7B6FA3C065FC", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*", "matchCriteriaId": "3EF854A1-ABB1-4E93-BE9A-44569EC76C0D", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc7:*:*:*:*:*:*", "matchCriteriaId": "F5DC0CA6-F0AF-4DDF-A882-3DADB9A886A7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc8:*:*:*:*:*:*", "matchCriteriaId": "EB5B7DFC-C36B-45D8-922C-877569FDDF43", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing/dma: Cap dma_map_sg tracepoint arrays to prevent buffer overflow\n\nThe dma_map_sg tracepoint can trigger a perf buffer overflow when\ntracing large scatter-gather lists. With devices like virtio-gpu\ncreating large DRM buffers, nents can exceed 1000 entries, resulting\nin:\n\n phys_addrs: 1000 * 8 bytes = 8,000 bytes\n dma_addrs: 1000 * 8 bytes = 8,000 bytes\n lengths: 1000 * 4 bytes = 4,000 bytes\n Total: ~20,000 bytes\n\nThis exceeds PERF_MAX_TRACE_SIZE (8192 bytes), causing:\n\n WARNING: CPU: 0 PID: 5497 at kernel/trace/trace_event_perf.c:405\n perf buffer not large enough, wanted 24620, have 8192\n\nCap all three dynamic arrays at 128 entries using min() in the array\nsize calculation. This ensures arrays are only as large as needed\n(up to the cap), avoiding unnecessary memory allocation for small\noperations while preventing overflow for large ones.\n\nThe tracepoint now records the full nents/ents counts and a truncated\nflag so users can see when data has been capped.\n\nChanges in v2:\n- Use min(nents, DMA_TRACE_MAX_ENTRIES) for dynamic array sizing\n instead of fixed DMA_TRACE_MAX_ENTRIES allocation (feedback from\n Steven Rostedt)\n- This allocates only what's needed up to the cap, avoiding waste\n for small operations\n\nReviwed-by: Sean Anderson <sean.anderson@linux.dev>"}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ntracing/dma: Limitar los arrays del tracepoint dma_map_sg para prevenir el desbordamiento de b\u00fafer\n\nEl tracepoint dma_map_sg puede desencadenar un desbordamiento de b\u00fafer de perf al trazar listas grandes de scatter-gather. Con dispositivos como virtio-gpu creando b\u00faferes DRM grandes, nents puede exceder las 1000 entradas, resultando en:\n\n phys_addrs: 1000 * 8 bytes = 8.000 bytes\n dma_addrs: 1000 * 8 bytes = 8.000 bytes\n lengths: 1000 * 4 bytes = 4.000 bytes\n Total: ~20.000 bytes\n\nEsto excede PERF_MAX_TRACE_SIZE (8192 bytes), causando:\n\n ADVERTENCIA: CPU: 0 PID: 5497 en kernel/trace/trace_event_perf.c:405\n b\u00fafer de perf no lo suficientemente grande, se quer\u00edan 24620, se tienen 8192\n\nLimitar los tres arrays din\u00e1micos a 128 entradas usando min() en el c\u00e1lculo del tama\u00f1o del array. Esto asegura que los arrays sean solo tan grandes como sea necesario (hasta el l\u00edmite), evitando la asignaci\u00f3n de memoria innecesaria para operaciones peque\u00f1as mientras se previene el desbordamiento para las grandes.\n\nEl tracepoint ahora registra los conteos completos de nents/ents y un indicador de truncamiento para que los usuarios puedan ver cu\u00e1ndo los datos han sido limitados.\n\nCambios en v2:\n- Usar min(nents, DMA_TRACE_MAX_ENTRIES) para el dimensionamiento din\u00e1mico del array en lugar de la asignaci\u00f3n fija de DMA_TRACE_MAX_ENTRIES (comentarios de Steven Rostedt)\n- Esto asigna solo lo necesario hasta el l\u00edmite, evitando el desperdicio para operaciones peque\u00f1as\n\nRevisado por: Sean Anderson "}], "id": "CVE-2026-23390", "lastModified": "2026-06-17T10:21:29.223", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-03-25T11:16:39.567", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/02d209bb018a40dee9eac89e91860253dee9605b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/daafcc0ef0b358d9d622b6e3b7c43767aa3814ee"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f2584f791a10343bdc995ff6ff402db45b95de69"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-787"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: tracing/dma: Cap dma_map_sg tracepoint arrays to prevent buffer overflow", "id": "2451171", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2451171"}, "csaw": false, "cwe": "CWE-131", "details": ["A flaw was found in the Linux kernel. When tracing large scatter-gather lists, which are mechanisms for efficient data transfer, the `dma_map_sg` tracepoint can trigger a performance buffer overflow. This can lead to the tracing buffer becoming too small, potentially causing system warnings and affecting the stability of the tracing functionality."], "name": "CVE-2026-23390", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"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": "2026-03-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-23390\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-23390\nhttps://lore.kernel.org/linux-cve-announce/2026032537-CVE-2026-23390-7146@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,02d209bb018a40dee9eac89e91860253dee9605b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,f2584f791a10343bdc995ff6ff402db45b95de69)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,daafcc0ef0b358d9d622b6e3b7c43767aa3814ee)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.74,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.13,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "analysis": {"en": {"generated_at": "2026-04-28T21:58:23.221903+00:00", "value": {"mitigation_remediation": ["Upgrade the Linux kernel to a version that includes the dma_map_sg tracepoint patch which caps the array sizes at 128 entries.", "Reboot the system to load the updated kernel and ensure tracing uses the patched implementation.", "Disable the dma_map_sg tracepoint (e.g., by clearing the trace_events variable or using trace\u2011cmd to turn off the tracepoint) until the patch is fully rolled out."], "summary": {"action": "Apply Patch", "impact": "Denial of Service"}, "threat_synthesis": {"affected_systems": "The vulnerability is present in the Linux kernel across all supported distributions that embed the affected code path. No specific kernel releases are listed in the advisory, so any kernel version that contains the unpatched dma_map_sg tracepoint is susceptible. The focus is on the generic implementation rather than a particular vendor.", "description_and_impact": "The kernel\u2019s dma_map_sg tracepoint can allocate dynamic arrays large enough to overflow the perf buffer. When devices such as virtio-gpu create scatter\u2011gather lists with more than a thousand entries, the tracepoint attempts to record over 20\u202fKB of data, exceeding the 8\u202fKB limit enforced by PERF_MAX_TRACE_SIZE. This results in a buffer overflow logged as a perf buffer warning and can corrupt kernel memory, potentially leading to a system crash or denial of service. This issue is classified as a buffer overflow (CWE-131).", "risk_and_exploitability": "Exploitability is considered low to moderate. The CVSS score of 7.8 indicates a high severity vulnerability. The EPSS score is below 1\u202f% and the vulnerability is not listed in the CISA KEV catalog, indicating limited public exploitation. Attacks would require access to a user that can trigger large scatter\u2011gather operations or a privileged context that enables kernel tracing. Because the flaw only manifests when the dma_map_sg tracepoint is active, a local attacker would need to enable tracing and provoke a high\u2011entry list, making the risk lower than a remote RCE."}}}}, "created": "2026-03-25T21:31:26.250513+00:00", "updated": "2026-04-28T22:00:14.184426+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}