{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-46124", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.098Z", "datePublished": "2026-05-28T09:35:38.887Z", "dateUpdated": "2026-05-28T09:35:38.887Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-28T09:35:38.887Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nisofs: validate block number from NFS file handle in isofs_export_iget\n\nisofs_fh_to_dentry() and isofs_fh_to_parent() pass an attacker-\ncontrolled block number (ifid->block or ifid->parent_block) from\nthe NFS file handle to isofs_export_iget(), which only rejects\nblock == 0 before calling isofs_iget() and ultimately sb_bread().\nA crafted file handle with fh_len sufficient to pass the check\nadded by commit 0405d4b63d08 (\"isofs: Prevent the use of too small\nfid\") can still drive the server to read any in-range block on the\nbacking device as if it were an iso_directory_record. That earlier\nfix was assigned CVE-2025-37780.\n\nsb_bread() on an out-of-range block returns NULL cleanly via the\nEIO path, so there is no memory-safety violation. For in-range\nreads of adjacent-partition data on the same block device, the\nunrelated bytes end up in iso_inode_info fields that reach the NFS\nclient as dentry metadata. The deployment surface (isofs exported\nover NFS from loop-mounted images) is narrow and requires an\nauthenticated NFS peer, but the malformed-file-handle class is\nreportable as hardening next to the existing CVE-2025-37780 fix.\n\nReject block >= ISOFS_SB(sb)->s_nzones in isofs_export_iget() so\nthe check covers both isofs_fh_to_dentry() and isofs_fh_to_parent()\ncall sites with a single line."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/isofs/export.c"], "versions": [{"version": "952e7a7e317f126d0a2b879fc531b716932d5ffa", "lessThan": "bb0988ed4f2e26d59bbb58f644cb3a55b7521e21", "status": "affected", "versionType": "git"}, {"version": "56dfffea9fd3be0b3795a9ca6401e133a8427e0b", "lessThan": "0a1af74ae2177bda3aee0837a0546309aa539d0d", "status": "affected", "versionType": "git"}, {"version": "0405d4b63d082861f4eaff9d39c78ee9dc34f845", "lessThan": "afbafeddf23db13fe2edb2d5c0bf4bbb13d7881b", "status": "affected", "versionType": "git"}, {"version": "0405d4b63d082861f4eaff9d39c78ee9dc34f845", "lessThan": "4c721a1d9b3c4fcaf59cc9b2281e3ec5a043e1a6", "status": "affected", "versionType": "git"}, {"version": "0405d4b63d082861f4eaff9d39c78ee9dc34f845", "lessThan": "24376458138387fb251e782e624c7776e9826796", "status": "affected", "versionType": "git"}, {"version": "ee01a309ebf598be1ff8174901ed6e91619f1749", "status": "affected", "versionType": "git"}, {"version": "5e7de55602c61c8ff28db075cc49c8dd6989d7e0", "status": "affected", "versionType": "git"}, {"version": "63d5a3e207bf315a32c7d16de6c89753a759f95a", "status": "affected", "versionType": "git"}, {"version": "0fdafdaef796816a9ed0fd7ac812932d569d9beb", "status": "affected", "versionType": "git"}, {"version": "007124c896e7d4614ac1f6bd4dedb975c35a2a8e", "status": "affected", "versionType": "git"}, {"version": "6.6.88", "lessThan": "6.6.140", "status": "affected", "versionType": "semver"}, {"version": "6.12.25", "lessThan": "6.12.88", "status": "affected", "versionType": "semver"}, {"version": "5.4.293", "lessThan": "5.5", "status": "affected", "versionType": "semver"}, {"version": "5.10.237", "lessThan": "5.11", "status": "affected", "versionType": "semver"}, {"version": "5.15.181", "lessThan": "5.16", "status": "affected", "versionType": "semver"}, {"version": "6.1.135", "lessThan": "6.2", "status": "affected", "versionType": "semver"}, {"version": "6.14.4", "lessThan": "6.15", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/isofs/export.c"], "versions": [{"version": "6.15", "status": "affected"}, {"version": "0", "lessThan": "6.15", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.140", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.88", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.30", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.7", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1-rc2", "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": "6.6.88", "versionEndExcluding": "6.6.140"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.25", "versionEndExcluding": "6.12.88"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "6.18.30"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "7.0.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "7.1-rc2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.293"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.237"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.181"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.135"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14.4"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/bb0988ed4f2e26d59bbb58f644cb3a55b7521e21"}, {"url": "https://git.kernel.org/stable/c/0a1af74ae2177bda3aee0837a0546309aa539d0d"}, {"url": "https://git.kernel.org/stable/c/afbafeddf23db13fe2edb2d5c0bf4bbb13d7881b"}, {"url": "https://git.kernel.org/stable/c/4c721a1d9b3c4fcaf59cc9b2281e3ec5a043e1a6"}, {"url": "https://git.kernel.org/stable/c/24376458138387fb251e782e624c7776e9826796"}], "title": "isofs: validate block number from NFS file handle in isofs_export_iget", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nisofs: validate block number from NFS file handle in isofs_export_iget\n\nisofs_fh_to_dentry() and isofs_fh_to_parent() pass an attacker-\ncontrolled block number (ifid->block or ifid->parent_block) from\nthe NFS file handle to isofs_export_iget(), which only rejects\nblock == 0 before calling isofs_iget() and ultimately sb_bread().\nA crafted file handle with fh_len sufficient to pass the check\nadded by commit 0405d4b63d08 (\"isofs: Prevent the use of too small\nfid\") can still drive the server to read any in-range block on the\nbacking device as if it were an iso_directory_record. That earlier\nfix was assigned CVE-2025-37780.\n\nsb_bread() on an out-of-range block returns NULL cleanly via the\nEIO path, so there is no memory-safety violation. For in-range\nreads of adjacent-partition data on the same block device, the\nunrelated bytes end up in iso_inode_info fields that reach the NFS\nclient as dentry metadata. The deployment surface (isofs exported\nover NFS from loop-mounted images) is narrow and requires an\nauthenticated NFS peer, but the malformed-file-handle class is\nreportable as hardening next to the existing CVE-2025-37780 fix.\n\nReject block >= ISOFS_SB(sb)->s_nzones in isofs_export_iget() so\nthe check covers both isofs_fh_to_dentry() and isofs_fh_to_parent()\ncall sites with a single line."}], "id": "CVE-2026-46124", "lastModified": "2026-05-28T13:44:01.663", "metrics": {}, "published": "2026-05-28T10:16:27.920", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0a1af74ae2177bda3aee0837a0546309aa539d0d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/24376458138387fb251e782e624c7776e9826796"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4c721a1d9b3c4fcaf59cc9b2281e3ec5a043e1a6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/afbafeddf23db13fe2edb2d5c0bf4bbb13d7881b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bb0988ed4f2e26d59bbb58f644cb3a55b7521e21"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[952e7a7e317f126d0a2b879fc531b716932d5ffa,bb0988ed4f2e26d59bbb58f644cb3a55b7521e21)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[56dfffea9fd3be0b3795a9ca6401e133a8427e0b,0a1af74ae2177bda3aee0837a0546309aa539d0d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0405d4b63d082861f4eaff9d39c78ee9dc34f845,afbafeddf23db13fe2edb2d5c0bf4bbb13d7881b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0405d4b63d082861f4eaff9d39c78ee9dc34f845,4c721a1d9b3c4fcaf59cc9b2281e3ec5a043e1a6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[0405d4b63d082861f4eaff9d39c78ee9dc34f845,24376458138387fb251e782e624c7776e9826796)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "ee01a309ebf598be1ff8174901ed6e91619f1749"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "5e7de55602c61c8ff28db075cc49c8dd6989d7e0"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "63d5a3e207bf315a32c7d16de6c89753a759f95a"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "0fdafdaef796816a9ed0fd7ac812932d569d9beb"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "007124c896e7d4614ac1f6bd4dedb975c35a2a8e"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.6.88,6.6.140)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.12.25,6.12.88)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.4.293,5.5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.10.237,5.11)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.15.181,5.16)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.1.135,6.2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.14.4,6.15)"}}], "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": "6.15"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.15)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.140,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.88,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.30,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.7,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1-rc2,*]"}}], "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": "2026-05-28T11:30:15.485456+00:00", "updated": "2026-05-28T16:00:13.618595+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-20", "CWE-200"]}