{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-63872", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "REJECTED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.017Z", "datePublished": "2026-07-19T14:18:40.499Z", "dateUpdated": "2026-08-11T02:10:12.896Z", "dateRejected": "2026-08-11T02:10:12.896Z"}, "containers": {"cna": {"rejectedReasons": [{"lang": "en", "value": "This CVE ID has been rejected or withdrawn by its CVE Numbering Authority."}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-11T02:10:12.896Z"}, "x_generator": {"engine": "cvelib 1.8.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Rejected reason: This CVE ID has been rejected or withdrawn by its CVE Numbering Authority."}], "id": "CVE-2026-63872", "lastModified": "2026-08-11T03:18:00.410", "metrics": {}, "published": "2026-07-19T15:16:54.247", "references": [], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Rejected"}

{"bugzilla": {"description": "kernel: esp: fix page frag reference leak on skb_to_sgvec failure", "id": "2502281", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502281"}, "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-911", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nesp: fix page frag reference leak on skb_to_sgvec failure\nIn esp_output_tail(), when esp->inplace is false, the old skb page frags\nare replaced with a new page from the xfrm page_frag cache. The source\nscatterlist (sg) is built from the old frags before the replacement, and\nesp_ssg_unref() is responsible for releasing the old page references\nafter the crypto operation completes.\nHowever, if the second skb_to_sgvec() call (which builds the destination\nscatterlist from the new page) fails, the code jumps to error_free which\nonly calls kfree(tmp). The old page frag references captured in the\nsource scatterlist are never released:\n1. sg[] is built from old frags via skb_to_sgvec() (no extra get_page)\n2. nr_frags is set to 1 and frag[0] is replaced with the new page\n3. Second skb_to_sgvec() fails -> goto error_free\n4. kfree(tmp) frees the sg[] memory but old frags are not unref'd\n5. kfree_skb() only releases frag[0] (the new page), not the old ones\nFix this by adding a bool parameter to esp_ssg_unref() that, when true,\nunconditionally unrefs the source scatterlist frags without checking\nreq->src and req->dst, since those fields are not yet initialized by\naead_request_set_crypt() at the point of the error. Existing callers\npass false to preserve the original behavior.\nThe same issue exists in both esp4 and esp6 as the code is identical.", "A flaw was found in the Linux kernel's implementation of the Encapsulating Security Payload (ESP) protocol. This vulnerability occurs in the esp_output_tail function when processing network packets. If a specific operation to manage page fragments fails, the kernel does not properly release references to old memory pages. This oversight leads to a memory leak, which could potentially result in resource exhaustion and system instability over an extended period."], "name": "CVE-2026-63872", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-63872\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-63872\nhttps://lore.kernel.org/linux-cve-announce/2026071915-CVE-2026-63872-a943@gregkh/T"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[cac2661c53f35cbe651bef9b07026a5a05ab8ce0,e705b8ff4dd38fb8fe4e6fdc5378a86acea4feb5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[cac2661c53f35cbe651bef9b07026a5a05ab8ce0,2982e599fff6faa21c8df147d96fc7af6c1a2f24)"}}], "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": "4.11"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,4.11)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.13,7.1.0)"}}, {"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": "2026-07-21T05:45:03.048400+00:00", "title": "Memory Leak in Linux ESP Output Tail Causing Kernel Resource Exhaustion", "updated": "2026-08-04T18:30:12.419136+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}