{"attribution":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","cve":{"id":"CVE-2026-98124","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","published":"2026-09-25T11:17:43.720","lastModified":"2026-10-22T16:38:53.723","vulnStatus":"Analyzed","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 \u003e /proc/sys/vm/drop_caches\n                cat \"$FILE\" \u003e /dev/null\n                sync\n                echo 1 \u003e /proc/sys/vm/drop_caches\n\n                fallocate --zero-range -o 1M -l 1M \"$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":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","affectedData":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["fs/smb/client/smb2ops.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"31742c5a331766bc7df6b0d525df00c6cd20d5a6","lessThan":"cc7202a51b8777a757bda9dcfbf339f828c6a130","versionType":"git","status":"affected"},{"version":"31742c5a331766bc7df6b0d525df00c6cd20d5a6","lessThan":"dd8b1e808f5c19479e6ed47e2f88a1fd46f8b0e5","versionType":"git","status":"affected"},{"version":"31742c5a331766bc7df6b0d525df00c6cd20d5a6","lessThan":"93c6e5a8d7c5071d586c1411596d5db5faad22b2","versionType":"git","status":"affected"},{"version":"31742c5a331766bc7df6b0d525df00c6cd20d5a6","lessThan":"448ba0ae65ca61064183564d2983c9aa59bd6ba7","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["fs/smb/client/smb2ops.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"3.17","status":"affected"},{"version":"0","lessThan":"3.17","versionType":"semver","status":"unaffected"},{"version":"6.6.160","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.114","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"7.2.7","lessThanOrEqual":"7.2.*","versionType":"semver","status":"unaffected"},{"version":"7.3","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":3.6}]},"weaknesses":[{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-672"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.17.1","versionEndExcluding":"6.6.160","matchCriteriaId":"438C480C-978E-4F8C-A37D-7CB29AE32E61"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:-:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.12.114","matchCriteriaId":"7DD957C0-0777-4304-9BCA-7E8429CBE3D3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"7.2.7","matchCriteriaId":"BACEDE75-270F-419E-A22D-025914C6BA15"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:3.17:-:*:*:*:*:*:*","matchCriteriaId":"3A351B03-87A0-405B-8A9B-488E173E1E3B"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:3.17:rc2:*:*:*:*:*:*","matchCriteriaId":"434E8752-0D8B-42E1-8B8F-23C409AB442C"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:3.17:rc3:*:*:*:*:*:*","matchCriteriaId":"D64AD3CD-8D3C-4749-9042-969F524DCB68"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:3.17:rc4:*:*:*:*:*:*","matchCriteriaId":"4B4E29E3-9F10-43B1-A349-1F7484F6015A"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:3.17:rc5:*:*:*:*:*:*","matchCriteriaId":"4223286C-F679-4FEC-B144-1C3B942BD506"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:3.17:rc6:*:*:*:*:*:*","matchCriteriaId":"C889AAA8-186E-433F-A31D-FF09221E1EBC"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:3.17:rc7:*:*:*:*:*:*","matchCriteriaId":"80BC78EE-50D8-4561-A6A6-A370E72F215B"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.13:-:*:*:*:*:*:*","matchCriteriaId":"5A3F9505-6B98-4269-8B81-127E55A1BF00"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.3:rc1:*:*:*:*:*:*","matchCriteriaId":"11E35E1B-5DB4-4AB9-9706-CD73B799EADF"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/448ba0ae65ca61064183564d2983c9aa59bd6ba7","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/93c6e5a8d7c5071d586c1411596d5db5faad22b2","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/cc7202a51b8777a757bda9dcfbf339f828c6a130","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/dd8b1e808f5c19479e6ed47e2f88a1fd46f8b0e5","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]}]}}