{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98124", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.318Z", "datePublished": "2026-09-25T10:36:06.581Z", "dateUpdated": "2026-09-25T10:36:06.581Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-25T10:36:06.581Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb/client: invalidate fscache for fallocate range operations\n\nsmb3_zero_range(), smb3_punch_hole(), smb3_insert_range(), and\nsmb3_collapse_range() modify file contents through server-side range\noperations. These operations discard the affected page cache, but leave\nthe FS-Cache cookie valid, so a later read may return data cached before\nthe range operation.\n\nFix this by invalidating FS-Cache after outstanding I/O has completed\nand before modifying the file on the server.\n\nRun the following as root on a CIFS mount with fsc enabled and an active\nCacheFiles backend:\n\n bash -c '\n MNT=/mnt/cifs\n FILE=\"$MNT/repro\"\n\n # Generate four 1 MiB random blocks: [A][B][C][D].\n dd if=/dev/urandom of=/tmp/src bs=1M count=4 status=none\n\n # Expected contents after zeroing B: [A][zero][C][D].\n cp /tmp/src /tmp/expected\n dd if=/dev/zero of=/tmp/expected bs=1M seek=1 count=1 \\\n conv=notrunc status=none\n cp /tmp/src \"$FILE\"\n\n # Populate FS-Cache, then discard the page cache.\n sync\n echo 1 > /proc/sys/vm/drop_caches\n cat \"$FILE\" > /dev/null\n sync\n echo 1 > /proc/sys/vm/drop_caches\n\n fallocate --zero-range -o 1M -l 1M \"$FILE\"\n\n if cmp -s /tmp/expected \"$FILE\"; then\n echo \"readback: OK\"\n else\n echo \"readback: STALE DATA\"\n fi\n '\n\nBefore this change, the readback differs from /tmp/expected:\n\n readback: STALE DATA\n\nAfter this change, it matches:\n\n readback: OK"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/client/smb2ops.c"], "versions": [{"version": "31742c5a331766bc7df6b0d525df00c6cd20d5a6", "lessThan": "93c6e5a8d7c5071d586c1411596d5db5faad22b2", "status": "affected", "versionType": "git"}, {"version": "31742c5a331766bc7df6b0d525df00c6cd20d5a6", "lessThan": "448ba0ae65ca61064183564d2983c9aa59bd6ba7", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/smb/client/smb2ops.c"], "versions": [{"version": "3.17", "status": "affected"}, {"version": "0", "lessThan": "3.17", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.7", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3-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": "3.17", "versionEndExcluding": "7.2.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "7.3-rc2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/93c6e5a8d7c5071d586c1411596d5db5faad22b2"}, {"url": "https://git.kernel.org/stable/c/448ba0ae65ca61064183564d2983c9aa59bd6ba7"}], "title": "smb/client: invalidate fscache for fallocate range operations", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/smb/client/smb2ops.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "93c6e5a8d7c5071d586c1411596d5db5faad22b2", "status": "affected", "version": "31742c5a331766bc7df6b0d525df00c6cd20d5a6", "versionType": "git"}, {"lessThan": "448ba0ae65ca61064183564d2983c9aa59bd6ba7", "status": "affected", "version": "31742c5a331766bc7df6b0d525df00c6cd20d5a6", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/smb/client/smb2ops.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "3.17"}, {"lessThan": "3.17", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.7", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3-rc2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb/client: invalidate fscache for fallocate range operations\n\nsmb3_zero_range(), smb3_punch_hole(), smb3_insert_range(), and\nsmb3_collapse_range() modify file contents through server-side range\noperations. These operations discard the affected page cache, but leave\nthe FS-Cache cookie valid, so a later read may return data cached before\nthe range operation.\n\nFix this by invalidating FS-Cache after outstanding I/O has completed\nand before modifying the file on the server.\n\nRun the following as root on a CIFS mount with fsc enabled and an active\nCacheFiles backend:\n\n bash -c '\n MNT=/mnt/cifs\n FILE=\"$MNT/repro\"\n\n # Generate four 1 MiB random blocks: [A][B][C][D].\n dd if=/dev/urandom of=/tmp/src bs=1M count=4 status=none\n\n # Expected contents after zeroing B: [A][zero][C][D].\n cp /tmp/src /tmp/expected\n dd if=/dev/zero of=/tmp/expected bs=1M seek=1 count=1 \\\n conv=notrunc status=none\n cp /tmp/src \"$FILE\"\n\n # Populate FS-Cache, then discard the page cache.\n sync\n echo 1 > /proc/sys/vm/drop_caches\n cat \"$FILE\" > /dev/null\n sync\n echo 1 > /proc/sys/vm/drop_caches\n\n fallocate --zero-range -o 1M -l 1M \"$FILE\"\n\n if cmp -s /tmp/expected \"$FILE\"; then\n echo \"readback: OK\"\n else\n echo \"readback: STALE DATA\"\n fi\n '\n\nBefore this change, the readback differs from /tmp/expected:\n\n readback: STALE DATA\n\nAfter this change, it matches:\n\n readback: OK"}], "id": "CVE-2026-98124", "lastModified": "2026-09-25T11:17:43.720", "metrics": {}, "published": "2026-09-25T11:17:43.720", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/448ba0ae65ca61064183564d2983c9aa59bd6ba7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/93c6e5a8d7c5071d586c1411596d5db5faad22b2"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[31742c5a331766bc7df6b0d525df00c6cd20d5a6,93c6e5a8d7c5071d586c1411596d5db5faad22b2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[31742c5a331766bc7df6b0d525df00c6cd20d5a6,448ba0ae65ca61064183564d2983c9aa59bd6ba7)"}}], "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": "3.17"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,3.17)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.7,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.3-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": "2026-09-25T12:30:08.710236+00:00", "updated": "2026-09-25T12:45:16.649388+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-203"]}