CVE-2026-45961

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This\noccurs because the fail_per_node label doesn't call\ngfs2_destroy_threads().\n\nSecond leak: quota bitmap buffer (8192 bytes)\nWhen gfs2_make_fs_rw() fails after gfs2_quota_init() succeeds but\nbefore other operations complete, the allocated quota bitmap is never\nfreed.\n\nThe fix moves thread cleanup to the fail_per_node label to handle all\nerror paths uniformly. gfs2_destroy_threads() is safe to call\nunconditionally as it checks for NULL pointers. Quota cleanup is added\nin gfs2_make_fs_rw() to properly handle the withdrawal case where\nquota initialization succeeds but the filesystem is then withdrawn.\n\nThread leak backtrace (gfs2_freeze_lock_shared failure):\n unreferenced object 0xffff88801d7bca80 (size 4480):\n copy_process+0x3a1/0x4670 kernel/fork.c:2422\n kernel_clone+0xf3/0x6e0 kernel/fork.c:2779\n kthread_create_on_node+0x100/0x150 kernel/kthread.c:478\n init_threads+0xab/0x350 fs/gfs2/ops_fstype.c:611\n gfs2_fill_super+0xe5c/0x1240 fs/gfs2/ops_fstype.c:1265\n\nQuota leak backtrace (gfs2_make_fs_rw failure):\n unreferenced object 0xffff88812de7c000 (size 8192):\n gfs2_quota_init+0xe5/0x820 fs/gfs2/quota.c:1409\n gfs2_make_fs_rw+0x7a/0xe0 fs/gfs2/super.c:149\n gfs2_fill_super+0xfbb/0x1240 fs/gfs2/ops_fstype.c:1275"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/gfs2/ops_fstype.c", 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This\noccurs because the fail_per_node label doesn't call\ngfs2_destroy_threads().\n\nSecond leak: quota bitmap buffer (8192 bytes)\nWhen gfs2_make_fs_rw() fails after gfs2_quota_init() succeeds but\nbefore other operations complete, the allocated quota bitmap is never\nfreed.\n\nThe fix moves thread cleanup to the fail_per_node label to handle all\nerror paths uniformly. gfs2_destroy_threads() is safe to call\nunconditionally as it checks for NULL pointers. Quota cleanup is added\nin gfs2_make_fs_rw() to properly handle the withdrawal case where\nquota initialization succeeds but the filesystem is then withdrawn.\n\nThread leak backtrace (gfs2_freeze_lock_shared failure):\n unreferenced object 0xffff88801d7bca80 (size 4480):\n copy_process+0x3a1/0x4670 kernel/fork.c:2422\n kernel_clone+0xf3/0x6e0 kernel/fork.c:2779\n kthread_create_on_node+0x100/0x150 kernel/kthread.c:478\n init_threads+0xab/0x350 fs/gfs2/ops_fstype.c:611\n gfs2_fill_super+0xe5c/0x1240 fs/gfs2/ops_fstype.c:1265\n\nQuota leak backtrace (gfs2_make_fs_rw failure):\n unreferenced object 0xffff88812de7c000 (size 8192):\n gfs2_quota_init+0xe5/0x820 fs/gfs2/quota.c:1409\n gfs2_make_fs_rw+0x7a/0xe0 fs/gfs2/super.c:149\n gfs2_fill_super+0xfbb/0x1240 fs/gfs2/ops_fstype.c:1275"}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.191", "versionStartIncluding": "6.1.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.160", "versionStartIncluding": "6.3"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.114", "versionStartIncluding": "6.3"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.57", "versionStartIncluding": "6.3"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.19.4", "versionStartIncluding": "6.3"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.0", "versionStartIncluding": "6.3"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "5.10.173"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "5.15.99"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionStartIncluding": "6.2.3"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:25:52.033Z"}}}, "cveMetadata": {"cveId": "CVE-2026-45961", "state": "PUBLISHED", "dateUpdated": "2026-11-06T16:03:16.501Z", "dateReserved": "2026-05-13T15:03:33.089Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-05-27T12:18:17.637Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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This\noccurs because the fail_per_node label doesn't call\ngfs2_destroy_threads().\n\nSecond leak: quota bitmap buffer (8192 bytes)\nWhen gfs2_make_fs_rw() fails after gfs2_quota_init() succeeds but\nbefore other operations complete, the allocated quota bitmap is never\nfreed.\n\nThe fix moves thread cleanup to the fail_per_node label to handle all\nerror paths uniformly. gfs2_destroy_threads() is safe to call\nunconditionally as it checks for NULL pointers. Quota cleanup is added\nin gfs2_make_fs_rw() to properly handle the withdrawal case where\nquota initialization succeeds but the filesystem is then withdrawn.\n\nThread leak backtrace (gfs2_freeze_lock_shared failure):\n unreferenced object 0xffff88801d7bca80 (size 4480):\n copy_process+0x3a1/0x4670 kernel/fork.c:2422\n kernel_clone+0xf3/0x6e0 kernel/fork.c:2779\n kthread_create_on_node+0x100/0x150 kernel/kthread.c:478\n init_threads+0xab/0x350 fs/gfs2/ops_fstype.c:611\n gfs2_fill_super+0xe5c/0x1240 fs/gfs2/ops_fstype.c:1265\n\nQuota leak backtrace (gfs2_make_fs_rw failure):\n unreferenced object 0xffff88812de7c000 (size 8192):\n gfs2_quota_init+0xe5/0x820 fs/gfs2/quota.c:1409\n gfs2_make_fs_rw+0x7a/0xe0 fs/gfs2/super.c:149\n gfs2_fill_super+0xfbb/0x1240 fs/gfs2/ops_fstype.c:1275"}], "id": "CVE-2026-45961", "lastModified": "2026-11-06T16:18:54.343", "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-2026-45961", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T16:03:04.826948Z", "version": "2.0.3"}}]}, "published": "2026-05-27T14:17:12.783", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1fcca0f021ac8e2d19efddb6a733e8b6d4a3fb72"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4456be93464a599eac0eb2afa63b5d662e1599d8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4db5e4c8f1103b21005ab9e7fe9a5d2554438b74"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d049ba2c1723110f82227eaf521427980811169b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/da6f5bbc2e7902f578b503f2a4c3d8d09ca4b102"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e54229ecf49add8451d5f765a32c86ab4446e06c"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-401"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: gfs2: fix memory leaks in gfs2_fill_super error path", "id": "2482101", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482101"}, "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-772", "details": ["A flaw was found in the Linux kernel's GFS2 filesystem. When a GFS2 filesystem transitions to read-write mode, specific error handling paths within the `gfs2_fill_super()` function fail to properly deallocate memory. This can lead to memory leaks of kernel thread objects and quota bitmap buffers. Over time, these unreferenced memory allocations can exhaust system resources, resulting in a Denial of Service (DoS) for the affected system."], "name": "CVE-2026-45961", "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": "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-2026-45961\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-45961\nhttps://lore.kernel.org/linux-cve-announce/2026052734-CVE-2026-45961-ca6d@gregkh/T"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b66f723bb552ad59c2acb5d45ea45c890f84498b,e54229ecf49add8451d5f765a32c86ab4446e06c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b66f723bb552ad59c2acb5d45ea45c890f84498b,da6f5bbc2e7902f578b503f2a4c3d8d09ca4b102)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "2f8623377f3e0cfaa80558631b8694d02a492b4c"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "c713ebf2fe3f469e4af4de60a3427689ffb7c5d7"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "c2191e507147b1a22e9170ebb2aaa0f2902fcbfa"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "9fc32dad3cdba18669c71893f3e6d96905b39b3f"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.10.173,5.11)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.15.99,5.16)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.1.16,6.2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.2.3,6.3)"}}], "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": "semver", "value": "6.3"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.3)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.4,6.19.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0,*]"}}], "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": "2026-05-27T17:30:38.290949+00:00", "updated": "2026-06-16T23:00:06.095145+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-401", "CWE-772"]}