{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2023-53272", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-09-16T08:05:12.516Z", "datePublished": "2025-09-16T08:07:01.589Z", "dateUpdated": "2026-01-14T18:12:53.573Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-09-16T08:07:01.589Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ena: fix shift-out-of-bounds in exponential backoff\n\nThe ENA adapters on our instances occasionally reset. 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Using a\nbase value of 100us, the current code will overflow after (1<<29). Even\nat values before 32, this function wraps around, perhaps\nunintentionally.\n\nCap the value of the exponent used for this backoff at (1<<16) which is\nlarger than currently necessary, but large enough to support bigger\nvalues in the future."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/amazon/ena/ena_com.c"], "versions": [{"version": "4bb7f4cf60e38a00965d22aa5979ab143193d41f", "lessThan": "1e760b2d18bf129b3da052c2946c02758e97d15e", "status": "affected", "versionType": "git"}, {"version": "4bb7f4cf60e38a00965d22aa5979ab143193d41f", "lessThan": "3e36cc94d6e60a27f27498adf1c71eeba769ab33", "status": "affected", "versionType": "git"}, {"version": "4bb7f4cf60e38a00965d22aa5979ab143193d41f", "lessThan": "90947ebf8794e3c229fb2e16e37f1bfea6877f14", "status": "affected", "versionType": "git"}, {"version": "4bb7f4cf60e38a00965d22aa5979ab143193d41f", "lessThan": "0939c264729d4a081ff88efce2ffdf85dc5331e0", "status": "affected", "versionType": "git"}, {"version": "4bb7f4cf60e38a00965d22aa5979ab143193d41f", "lessThan": "1e9cb763e9bacf0c932aa948f50dcfca6f519a26", "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/net/ethernet/amazon/ena/ena_com.c"], "versions": [{"version": "5.8", "status": "affected"}, {"version": "0", "lessThan": "5.8", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.188", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.121", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.40", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.4.5", "lessThanOrEqual": "6.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.5", "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": "5.8", "versionEndExcluding": "5.10.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "5.15.121"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.1.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.4.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.8", "versionEndExcluding": "6.5"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/1e760b2d18bf129b3da052c2946c02758e97d15e"}, {"url": "https://git.kernel.org/stable/c/3e36cc94d6e60a27f27498adf1c71eeba769ab33"}, {"url": "https://git.kernel.org/stable/c/90947ebf8794e3c229fb2e16e37f1bfea6877f14"}, {"url": "https://git.kernel.org/stable/c/0939c264729d4a081ff88efce2ffdf85dc5331e0"}, {"url": "https://git.kernel.org/stable/c/1e9cb763e9bacf0c932aa948f50dcfca6f519a26"}], "title": "net: ena: fix shift-out-of-bounds in exponential backoff", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.1, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2023-53272", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-01-14T18:05:54.932143Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-125", "description": "CWE-125 Out-of-bounds Read"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-14T18:12:53.573Z"}}]}}

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Using a\nbase value of 100us, the current code will overflow after (1<<29). 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{"bugzilla": {"description": "kernel: net: ena: fix shift-out-of-bounds in exponential backoff", "id": "2395676", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2395676"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2023-53272", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-09-16T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-53272\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-53272\nhttps://lore.kernel.org/linux-cve-announce/2025091604-CVE-2023-53272-3be5@gregkh/T"], "threat_severity": "Important"}

{"created": "2025-09-17T10:05:06.871687+00:00", "updated": "2025-09-17T10:05:06.871741+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}