{"attribution":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","cve":{"id":"CVE-2026-98126","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","published":"2026-09-25T11:17:43.940","lastModified":"2026-10-22T16:02:09.817","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb/client: validate new EOF for zero range\n\nWhen FALLOC_FL_ZERO_RANGE is used without FALLOC_FL_KEEP_SIZE,\nsmb3_zero_range() may extend EOF without checking RLIMIT_FSIZE, allowing\nthe file to grow beyond the caller's file-size limit.\n\nFix this by calling inode_newsize_ok() before sending the zero-range\nrequest when the operation would extend EOF.\n\nReproducer, using a file on a CIFS mount:\n\n\tbash -c '\n\t        FILE=/mnt/cifs/repro\n\n\t        trap \"\" SIGXFSZ\n\t        ulimit -f 3072\n\n\t        truncate -s 2M \"$FILE\"\n\t        fallocate --zero-range -o 0 -l 4M \"$FILE\"\n\t        echo \"fallocate rc=$?\"\n\t        stat -c \"file size=%s\" \"$FILE\"\n\t'\n\nBefore this change, the operation succeeds despite the 3 MiB limit:\n\n\tfallocate rc=0\n\tfile size=4194304\n\nAfter this change, fallocate fails and leaves the file at 2 MiB."}],"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":"72c419d9b073628d3b5b0b2fc787b724f1a8c726","lessThan":"5fbd8848f2e25c8163896ec52863df2305a3bb63","versionType":"git","status":"affected"},{"version":"72c419d9b073628d3b5b0b2fc787b724f1a8c726","lessThan":"3673f057b64abfa957e8ae84448db69369a5091a","versionType":"git","status":"affected"},{"version":"72c419d9b073628d3b5b0b2fc787b724f1a8c726","lessThan":"06a4f9049cb6dc319bceec2dc813ba89add8b828","versionType":"git","status":"affected"},{"version":"72c419d9b073628d3b5b0b2fc787b724f1a8c726","lessThan":"f320ca20c273a26cd779bdb2b2e4b076a95c76f6","versionType":"git","status":"affected"},{"version":"72c419d9b073628d3b5b0b2fc787b724f1a8c726","lessThan":"88972e35750792e717af287dc71f42a03b5cbce4","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":"5.1","status":"affected"},{"version":"0","lessThan":"5.1","versionType":"semver","status":"unaffected"},{"version":"6.6.160","lessThanOrEqual":"6.6.*","versionType":"semver","status":"unaffected"},{"version":"6.12.111","lessThanOrEqual":"6.12.*","versionType":"semver","status":"unaffected"},{"version":"6.18.53","lessThanOrEqual":"6.18.*","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-770"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.1","versionEndExcluding":"6.6.160","matchCriteriaId":"C8BA8F59-66E8-4D4D-8ED2-10000122964B"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.12.111","matchCriteriaId":"47BC31C9-3D9E-4B96-B5F8-291D6AD55D81"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"6.18.53","matchCriteriaId":"7561AABB-6D5A-4324-BC66-C6C6B012AFD8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"7.2.7","matchCriteriaId":"19917B2D-B4B2-4416-A482-9C7C4929A921"},{"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/06a4f9049cb6dc319bceec2dc813ba89add8b828","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/3673f057b64abfa957e8ae84448db69369a5091a","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/5fbd8848f2e25c8163896ec52863df2305a3bb63","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/88972e35750792e717af287dc71f42a03b5cbce4","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/f320ca20c273a26cd779bdb2b2e4b076a95c76f6","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]}]}}