CVE-2026-53176

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The\ncopy into the 8192-byte login->req_buf runs far out of bounds and\nfaults, crashing the target node. The login phase precedes iSCSI\nauthentication, so no credentials are required to reach this path.\n\nReject any login PDU shorter than ISER_HEADERS_LEN before the\nsubtraction, mirroring the existing early return on a failed work\ncompletion, so login_req_len can never go negative. The upper bound was\nalready safe: a posted login buffer cannot deliver more than\nISER_RX_PAYLOAD_SIZE, so the difference stays at or below\nMAX_KEY_VALUE_PAIRS and the existing min() clamps it; only the missing\nlower bound needs to be added."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL"}, "scenarios": [{"lang": "en", "value": "AV:N - The vulnerable code is reached by a remote iSER initiator over an RDMA/iSER target portal using RDMA CM and posted Send login PDUs. This is network protocol input to a kernel storage target service.\nAC:L - The attacker only needs to establish an iSER connection and send a login PDU shorter than ISER_HEADERS_LEN. No race or condition outside the attacker's control is required.\nPR:N - The vulnerable memcpy occurs during iSCSI login processing before CHAP/authentication, initiator ACL checks, and normal session authorization complete. No credentials are required.\nUI:N - Exploitation is triggered solely by attacker-sent network/RDMA traffic to the exposed target portal. No victim user action is required.\nS:U - The impact is within the kernel and target host security authority. There is no VM, IOMMU, or other cross-scope boundary involved.\nC:H - The signed underflow drives an out-of-bounds kernel memcpy that reads far beyond the receive buffer. As kernel memory corruption with an out-of-bounds read component, high confidentiality impact is the higher defensible choice.\nI:H - The same oversized memcpy writes far beyond the 8192-byte login request buffer into adjacent kernel memory. This is an out-of-bounds write and may be exploitable for kernel memory corruption, so integrity impact is high.\nA:H - The commit and code path show the huge memcpy faults and crashes the iSER target node. A remote unauthenticated attacker can repeatedly trigger kernel oops/panic-level 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/ulp/isert/ib_isert.c"], "versions": [{"version": "b8d26b3be8b33682cf163274ed07479a70554633", "lessThan": "75ee6e4aa096aa9e7b2dd5c8ff98356e30aceefb", "status": "affected", "versionType": "git"}, {"version": "b8d26b3be8b33682cf163274ed07479a70554633", "lessThan": "e8a013c0c3ca2f6708341a56612a3f6d6921620a", "status": "affected", "versionType": "git"}, {"version": "b8d26b3be8b33682cf163274ed07479a70554633", "lessThan": "bd22740d7f14cb1c0289444cfd2c8d2938667c1d", "status": "affected", "versionType": "git"}, {"version": "b8d26b3be8b33682cf163274ed07479a70554633", "lessThan": "c1234229399f4af12c553b1b0ffd978eeba65548", "status": "affected", "versionType": "git"}, {"version": "b8d26b3be8b33682cf163274ed07479a70554633", "lessThan": "c5584e089b5af7b3bf8bd5e8ca0560cbf32b0a47", "status": "affected", "versionType": "git"}, {"version": "b8d26b3be8b33682cf163274ed07479a70554633", "lessThan": "df422fd273c96c2ee5beb80fc21adc8c70c29260", "status": "affected", "versionType": "git"}, {"version": "b8d26b3be8b33682cf163274ed07479a70554633", "lessThan": "1ca40b243277c9e88be5e00bd3e083f71aefb93e", "status": "affected", "versionType": "git"}, {"version": "b8d26b3be8b33682cf163274ed07479a70554633", "lessThan": "29e7b925ae6df64894e82ab6419994dc25580a8a", "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/ulp/isert/ib_isert.c"], "versions": [{"version": "3.10", "status": "affected"}, {"version": "0", "lessThan": "3.10", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.259", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.210", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.176", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.143", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.94", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.36", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.13", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "3.10", 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"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.10", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/75ee6e4aa096aa9e7b2dd5c8ff98356e30aceefb"}, {"url": "https://git.kernel.org/stable/c/e8a013c0c3ca2f6708341a56612a3f6d6921620a"}, {"url": "https://git.kernel.org/stable/c/bd22740d7f14cb1c0289444cfd2c8d2938667c1d"}, {"url": "https://git.kernel.org/stable/c/c1234229399f4af12c553b1b0ffd978eeba65548"}, {"url": "https://git.kernel.org/stable/c/c5584e089b5af7b3bf8bd5e8ca0560cbf32b0a47"}, {"url": "https://git.kernel.org/stable/c/df422fd273c96c2ee5beb80fc21adc8c70c29260"}, {"url": "https://git.kernel.org/stable/c/1ca40b243277c9e88be5e00bd3e083f71aefb93e"}, {"url": "https://git.kernel.org/stable/c/29e7b925ae6df64894e82ab6419994dc25580a8a"}], "title": "IB/isert: Reject login PDUs shorter than ISER_HEADERS_LEN", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"affected": [{"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:enterprise_linux:10.2"], "defaultStatus": "affected", "packageName": "kernel", "product": "Red Hat Enterprise Linux 10", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "0:6.12.0-211.56.1.el10_2", "versionType": "rpm"}]}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:enterprise_linux:8::nfv"], "defaultStatus": "affected", "packageName": "kernel-rt", "product": "Red Hat Enterprise Linux 8", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "0:4.18.0-553.164.1.rt7.505.el8_10", "versionType": "rpm"}]}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:enterprise_linux:8"], "defaultStatus": "affected", "packageName": "kernel", "product": "Red Hat Enterprise Linux 8", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "0:4.18.0-553.164.1.el8_10", "versionType": "rpm"}]}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/a:redhat:enterprise_linux:9", "cpe:/o:redhat:enterprise_linux:9"], "defaultStatus": "affected", "packageName": "kernel", "product": "Red Hat Enterprise Linux 9", "vendor": "Red Hat", "versions": [{"lessThan": "*", "status": "unaffected", "version": "0:5.14.0-687.49.1.el9_8", "versionType": "rpm"}]}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:enterprise_linux:6"], "defaultStatus": "unaffected", "packageName": "kernel", "product": "Red Hat Enterprise Linux 6", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:enterprise_linux:7"], "defaultStatus": "affected", "packageName": "kernel", "product": "Red Hat Enterprise Linux 7", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:enterprise_linux:7"], "defaultStatus": "affected", "packageName": "kernel-rt", "product": "Red Hat Enterprise Linux 7", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:enterprise_linux:9"], "defaultStatus": "affected", "packageName": "kernel-rt", "product": "Red Hat Enterprise Linux 9", "vendor": "Red Hat"}], "datePublic": "2026-06-25T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "A flaw was found in the Linux kernel's Internet Small Computer System Interface (iSCSI) Extensions for Remote Direct Memory Access (RDMA) (iSER) module. A remote attacker can send a specially crafted login request with a payload shorter than expected, leading to an integer underflow. This underflow causes a negative length to be used in a memory copy operation, resulting in an out-of-bounds write that crashes the system. This vulnerability allows an unauthenticated remote attacker to cause a Denial of Service (DoS)."}], "metrics": [{"other": {"content": {"namespace": "https://access.redhat.com/security/updates/classification/", "value": "Moderate"}, "type": "Red Hat severity rating"}}, {"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "format": "CVSS"}], "problemTypes": [{"descriptions": [{"cweId": "CWE-839", "description": "Numeric Range Comparison Without Minimum Check", "lang": "en", "type": "CWE"}]}], "references": [{"tags": ["vdb-entry", "x_refsource_REDHAT"], "url": "https://access.redhat.com/security/cve/CVE-2026-53176"}, {"name": "RHBZ#2492741", "tags": ["issue-tracking", "x_refsource_REDHAT"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492741"}, {"tags": ["x_sadp-csaf-vex"], "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53176.json"}, {"tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "https://access.redhat.com/errata/RHSA-2026:68507"}, {"tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "https://access.redhat.com/errata/RHSA-2026:68570"}, {"tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "https://access.redhat.com/errata/RHSA-2026:68531"}, {"tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "https://access.redhat.com/errata/RHSA-2026:68532"}], "solutions": [{"lang": "en", "value": "RHSA-2026:68507: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10), Red Hat Enterprise Linux Real Time (v. 10), Red Hat Enterprise Linux Real Time for NFV (v. 10)"}, {"lang": "en", "value": "RHSA-2026:68570: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux BaseOS (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9), Red Hat Enterprise Linux Real Time (v. 9), Red Hat Enterprise Linux Real Time for NFV (v. 9)"}, {"lang": "en", "value": "RHSA-2026:68531: Red Hat Enterprise Linux BaseOS (v. 8), Red Hat Enterprise Linux CRB (v. 8)"}, {"lang": "en", "value": "RHSA-2026:68532: Red Hat Enterprise Linux NFV (v. 8), Red Hat Enterprise Linux RT (v. 8)"}], "timeline": [{"lang": "en", "time": "2026-06-25T00:00:00.000Z", "value": "Reported to Red Hat."}, {"lang": "en", "time": "2026-06-25T00:00:00.000Z", "value": "Made public."}], "title": "kernel: IB/isert: Reject login PDUs shorter than ISER_HEADERS_LEN", "workarounds": [{"lang": "en", "value": "To mitigate this issue, prevent module ib_isert from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically."}], "x_adpType": "supplier", "x_generator": {"engine": "sadp-cli 1.0.0"}, "providerMetadata": {"orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "shortName": "redhat-SADP", "dateUpdated": "2026-09-18T12:04:40.163Z"}}, {"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-53176", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T15:26:06.476116Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-839", "description": "CWE-839 Numeric Range Comparison Without Minimum Check"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-19T19:57:26.130Z"}}]}}

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The\ncopy into the 8192-byte login->req_buf runs far out of bounds and\nfaults, crashing the target node. The login phase precedes iSCSI\nauthentication, so no credentials are required to reach this path.\n\nReject any login PDU shorter than ISER_HEADERS_LEN before the\nsubtraction, mirroring the existing early return on a failed work\ncompletion, so login_req_len can never go negative. The upper bound was\nalready safe: a posted login buffer cannot deliver more than\nISER_RX_PAYLOAD_SIZE, so the difference stays at or below\nMAX_KEY_VALUE_PAIRS and the existing min() clamps it; only the missing\nlower bound needs to be added."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL"}, "scenarios": [{"lang": "en", "value": "AV:N - The vulnerable code is reached by a remote iSER initiator over an RDMA/iSER target portal using RDMA CM and posted Send login PDUs. This is network protocol input to a kernel storage target service.\nAC:L - The attacker only needs to establish an iSER connection and send a login PDU shorter than ISER_HEADERS_LEN. No race or condition outside the attacker's control is required.\nPR:N - The vulnerable memcpy occurs during iSCSI login processing before CHAP/authentication, initiator ACL checks, and normal session authorization complete. No credentials are required.\nUI:N - Exploitation is triggered solely by attacker-sent network/RDMA traffic to the exposed target portal. No victim user action is required.\nS:U - The impact is within the kernel and target host security authority. There is no VM, IOMMU, or other cross-scope boundary involved.\nC:H - The signed underflow drives an out-of-bounds kernel memcpy that reads far beyond the receive buffer. As kernel memory corruption with an out-of-bounds read component, high confidentiality impact is the higher defensible choice.\nI:H - The same oversized memcpy writes far beyond the 8192-byte login request buffer into adjacent kernel memory. This is an out-of-bounds write and may be exploitable for kernel memory corruption, so integrity impact is high.\nA:H - The commit and code path show the huge memcpy faults and crashes the iSER target node. A remote unauthenticated attacker can repeatedly trigger kernel oops/panic-level 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/ulp/isert/ib_isert.c"], "versions": [{"version": "b8d26b3be8b33682cf163274ed07479a70554633", "lessThan": "75ee6e4aa096aa9e7b2dd5c8ff98356e30aceefb", "status": "affected", "versionType": "git"}, {"version": "b8d26b3be8b33682cf163274ed07479a70554633", "lessThan": "e8a013c0c3ca2f6708341a56612a3f6d6921620a", "status": "affected", "versionType": "git"}, {"version": "b8d26b3be8b33682cf163274ed07479a70554633", "lessThan": "bd22740d7f14cb1c0289444cfd2c8d2938667c1d", "status": "affected", "versionType": "git"}, {"version": "b8d26b3be8b33682cf163274ed07479a70554633", "lessThan": "c1234229399f4af12c553b1b0ffd978eeba65548", "status": "affected", "versionType": "git"}, {"version": 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following vulnerability has been resolved:\n\nIB/isert: Reject login PDUs shorter than ISER_HEADERS_LEN\n\nIn drivers/infiniband/ulp/isert/ib_isert.c, isert_login_recv_done()\ncomputes the login request payload length as wc->byte_len minus\nISER_HEADERS_LEN with no lower bound, and login_req_len is a signed int.\nA remote iSER initiator can post a login Send work request carrying\nfewer than ISER_HEADERS_LEN (76) bytes, so the subtraction underflows\nand login_req_len becomes negative.\n\nisert_rx_login_req() then reads that negative length back into a signed\nint, takes size = min(rx_buflen, MAX_KEY_VALUE_PAIRS), and because the\nmin() is signed it keeps the negative value; the value is then passed as\nthe memcpy() length and sign-extended to a multi-gigabyte size_t. The\ncopy into the 8192-byte login->req_buf runs far out of bounds and\nfaults, crashing the target node. The login phase precedes iSCSI\nauthentication, so no credentials are required to reach this path.\n\nReject any login PDU shorter than ISER_HEADERS_LEN before the\nsubtraction, mirroring the existing early return on a failed work\ncompletion, so login_req_len can never go negative. The upper bound was\nalready safe: a posted login buffer cannot deliver more than\nISER_RX_PAYLOAD_SIZE, so the difference stays at or below\nMAX_KEY_VALUE_PAIRS and the existing min() clamps it; only the missing\nlower bound needs to be added."}], "id": "CVE-2026-53176", "lastModified": "2026-10-19T20:19:06.103", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-53176", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:26:06.476116Z", "version": "2.0.3"}}]}, "published": "2026-06-25T09:16:34.953", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1ca40b243277c9e88be5e00bd3e083f71aefb93e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/29e7b925ae6df64894e82ab6419994dc25580a8a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/75ee6e4aa096aa9e7b2dd5c8ff98356e30aceefb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/bd22740d7f14cb1c0289444cfd2c8d2938667c1d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c1234229399f4af12c553b1b0ffd978eeba65548"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c5584e089b5af7b3bf8bd5e8ca0560cbf32b0a47"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/df422fd273c96c2ee5beb80fc21adc8c70c29260"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e8a013c0c3ca2f6708341a56612a3f6d6921620a"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:68507"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:68531"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:68532"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:68570"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/security/cve/CVE-2026-53176"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492741"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "tags": ["Third Party Advisory"], "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53176.json"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-191"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-839"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-839"}], "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: IB/isert: Reject login PDUs shorter than ISER_HEADERS_LEN", "id": "2492741", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492741"}, "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"}, "cwe": "CWE-839", "details": ["A flaw was found in the Linux kernel's Internet Small Computer System Interface (iSCSI) Extensions for Remote Direct Memory Access (RDMA) (iSER) module. A remote attacker can send a specially crafted login request with a payload shorter than expected, leading to an integer underflow. This underflow causes a negative length to be used in a memory copy operation, resulting in an out-of-bounds write that crashes the system. This vulnerability allows an unauthenticated remote attacker to cause a Denial of Service (DoS)."], "name": "CVE-2026-53176", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "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": "2026-06-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-53176\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-53176\nhttps://lore.kernel.org/linux-cve-announce/2026062553-CVE-2026-53176-c8a7@gregkh/T"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b8d26b3be8b33682cf163274ed07479a70554633,75ee6e4aa096aa9e7b2dd5c8ff98356e30aceefb)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b8d26b3be8b33682cf163274ed07479a70554633,e8a013c0c3ca2f6708341a56612a3f6d6921620a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b8d26b3be8b33682cf163274ed07479a70554633,bd22740d7f14cb1c0289444cfd2c8d2938667c1d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b8d26b3be8b33682cf163274ed07479a70554633,c1234229399f4af12c553b1b0ffd978eeba65548)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b8d26b3be8b33682cf163274ed07479a70554633,c5584e089b5af7b3bf8bd5e8ca0560cbf32b0a47)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b8d26b3be8b33682cf163274ed07479a70554633,df422fd273c96c2ee5beb80fc21adc8c70c29260)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b8d26b3be8b33682cf163274ed07479a70554633,1ca40b243277c9e88be5e00bd3e083f71aefb93e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b8d26b3be8b33682cf163274ed07479a70554633,29e7b925ae6df64894e82ab6419994dc25580a8a)"}}], "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": "affected", "versions": {"scheme": "generic", "value": "3.10"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,3.10)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.10.259,5.10.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.15.210,5.15.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.1.176,6.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.6.143,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.94,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1,*]"}}], "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"}], "created": "2026-06-25T11:15:10.154541+00:00", "updated": "2026-08-12T07:45:16.713875+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-191", "CWE-839"]}