{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-53091", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.384Z", "datePublished": "2026-06-24T16:30:30.290Z", "dateUpdated": "2026-07-15T00:45:00.084Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-28T06:39:14.145Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: pull headers in qdisc_pkt_len_segs_init()\n\nMost ndo_start_xmit() methods expects headers of gso packets\nto be already in skb->head.\n\nnet/core/tso.c users are particularly at risk, because tso_build_hdr()\ndoes a memcpy(hdr, skb->data, hdr_len);\n\nqdisc_pkt_len_segs_init() already does a dissection of gso packets.\n\nUse pskb_may_pull() instead of skb_header_pointer() to make\nsure drivers do not have to reimplement this.\n\nSome malicious packets could be fed, detect them so that we can\ndrop them sooner with a new SKB_DROP_REASON_SKB_BAD_GSO drop_reason."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:H", "baseScore": 8.4, "baseSeverity": "HIGH"}}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/net/dropreason-core.h", "net/core/dev.c"], "versions": [{"version": "e876f208af18b074f800656e4d1b99da75b2135f", "lessThan": "9d4f5c68f5ad4ab425f3ce1500c97c9f9743999a", "status": "affected", "versionType": "git"}, {"version": "e876f208af18b074f800656e4d1b99da75b2135f", "lessThan": "7fb4c19670110f052c04e1ec1d2b953b9f4f57e4", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": 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"https://git.kernel.org/stable/c/7fb4c19670110f052c04e1ec1d2b953b9f4f57e4"}], "title": "net: pull headers in qdisc_pkt_len_segs_init()", "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"], "defaultStatus": "affected", "packageName": "kernel", "product": "Red Hat Enterprise Linux 10", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:enterprise_linux:6"], "defaultStatus": "unknown", "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:8"], "defaultStatus": "affected", "packageName": "kernel", "product": "Red Hat Enterprise Linux 8", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:enterprise_linux:8"], "defaultStatus": "affected", "packageName": "kernel-rt", "product": "Red Hat Enterprise Linux 8", "vendor": "Red Hat"}, {"collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": ["cpe:/o:redhat:enterprise_linux:9"], "defaultStatus": "affected", "packageName": "kernel", "product": "Red Hat Enterprise Linux 9", "vendor": "Red Hat"}, {"collectionURL": 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A remote attacker could exploit this by sending specially crafted malicious packets, potentially causing a denial of service (DoS) or other unexpected system behavior."}], "metrics": [{"other": {"content": {"namespace": "https://access.redhat.com/security/updates/classification/", "value": "Important"}, "type": "Red Hat severity rating"}}, {"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "format": "CVSS"}], "problemTypes": [{"descriptions": [{"cweId": "CWE-131", "description": "Incorrect Calculation of Buffer Size", "lang": "en", "type": "CWE"}]}], "references": [{"tags": ["vdb-entry", "x_refsource_REDHAT"], "url": "https://access.redhat.com/security/cve/CVE-2026-53091"}, {"name": "RHBZ#2492270", "tags": ["issue-tracking", "x_refsource_REDHAT"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492270"}, {"tags": ["x_sadp-csaf-vex"], "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53091.json"}], "timeline": [{"lang": "en", "time": "2026-06-24T00:00:00.000Z", "value": "Reported to Red Hat."}, {"lang": "en", "time": "2026-06-24T00:00:00.000Z", "value": "Made public."}], "title": "kernel: net: pull headers in qdisc_pkt_len_segs_init()", "x_adpType": "supplier", "x_generator": {"engine": "sadp-cli 1.0.0"}, "providerMetadata": {"orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "shortName": "redhat-SADP", "dateUpdated": "2026-07-15T00:45:00.084Z"}}]}}

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{"bugzilla": {"description": "kernel: net: pull headers in qdisc_pkt_len_segs_init()", "id": "2492270", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492270"}, "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-131", "details": ["A flaw was found in the Linux kernel's handling of Generic Segmentation Offload (GSO) packet headers. This vulnerability occurs when the `qdisc_pkt_len_segs_init()` function does not properly pull headers into the expected memory location, which can lead to incorrect processing by network drivers. A remote attacker could exploit this by sending specially crafted malicious packets, potentially causing a denial of service (DoS) or other unexpected system behavior."], "name": "CVE-2026-53091", "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": "Under investigation", "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": "2026-06-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-53091\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-53091\nhttps://lore.kernel.org/linux-cve-announce/2026062409-CVE-2026-53091-cb58@gregkh/T"], "threat_severity": "Important"}

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