CVE-2026-45964

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This leads\nto a kref leak where the gss_auth structure is never freed.\n\nAdd a forward declaration for gss_free_callback() and call kref_put()\nin the err_put_pipe_version error path to properly release the\nreference taken earlier."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/sunrpc/auth_gss/auth_gss.c"], "versions": [{"version": "5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e", "lessThan": "3b2b6c42070ce4204936288253baf101e995c2d3", "status": "affected", "versionType": "git"}, {"version": "5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e", "lessThan": "b559be2ec6cdb2e9c2c36c23fbbd4690d8a5c3f7", "status": "affected", "versionType": "git"}, {"version": "5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e", "lessThan": "a1bc9561b617ec7e2d09e6c134d1db8fcf9ca4a6", "status": "affected", "versionType": "git"}, {"version": "5940d1cf9f42f67e9cc3f7df9eda39f5888d6e9e", 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This leads\nto a kref leak where the gss_auth structure is never freed.\n\nAdd a forward declaration for gss_free_callback() and call kref_put()\nin the err_put_pipe_version error path to properly release the\nreference taken earlier."}], "id": "CVE-2026-45964", "lastModified": "2026-11-06T17:17:26.890", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-45964", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T16:03:16.740748Z", "version": "2.0.3"}}]}, "published": "2026-05-27T14:17:13.177", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3b2b6c42070ce4204936288253baf101e995c2d3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/655c9ba9915f05266998dbbf4b76b3c79b8a70aa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a1bc9561b617ec7e2d09e6c134d1db8fcf9ca4a6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a2d4e9a76de0b2178001214ba5de5bf94a7354aa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b559be2ec6cdb2e9c2c36c23fbbd4690d8a5c3f7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c20f925214249bb4fc04f7e197bea142a6438af6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/dd2fdc3504592d85e549c523b054898a036a6afe"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e464e26b2457005c87e158570498274b9f3b90c7"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-401"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: SUNRPC: fix gss_auth kref leak in gss_alloc_msg error path", "id": "2482088", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482088"}, "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": ["A flaw was found in the Linux kernel's SUNRPC (Sun Remote Procedure Call) gss_auth module. An issue in the error handling path for `gss_alloc_msg` could lead to a kernel reference count (kref) leak. This occurs when a memory allocation fails, preventing the proper release of the `gss_auth` structure. A local attacker could potentially exploit this memory leak to cause a denial of service by exhausting system resources."], "name": "CVE-2026-45964", "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": "2026-05-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-45964\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-45964\nhttps://lore.kernel.org/linux-cve-announce/2026052734-CVE-2026-45964-a8a3@gregkh/T"], "threat_severity": "Low"}

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