164 lines
8.6 KiB
JSON
164 lines
8.6 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-98124",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-09-25T10:25:14.318Z",
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"datePublished": "2026-09-25T10:36:06.581Z",
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"dateUpdated": "2026-10-21T12:54:35.267Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-10-21T12:54:35.267Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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"
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/smb/client/smb2ops.c"
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],
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"versions": [
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{
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"version": "31742c5a331766bc7df6b0d525df00c6cd20d5a6",
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"lessThan": "cc7202a51b8777a757bda9dcfbf339f828c6a130",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "31742c5a331766bc7df6b0d525df00c6cd20d5a6",
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"lessThan": "dd8b1e808f5c19479e6ed47e2f88a1fd46f8b0e5",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "31742c5a331766bc7df6b0d525df00c6cd20d5a6",
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"lessThan": "93c6e5a8d7c5071d586c1411596d5db5faad22b2",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "31742c5a331766bc7df6b0d525df00c6cd20d5a6",
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"lessThan": "448ba0ae65ca61064183564d2983c9aa59bd6ba7",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/smb/client/smb2ops.c"
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],
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"versions": [
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{
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"version": "3.17",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "3.17",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.160",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.114",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2.7",
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"lessThanOrEqual": "7.2.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.3",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.17",
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"versionEndExcluding": "6.6.160"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.17",
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"versionEndExcluding": "6.12.114"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.17",
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"versionEndExcluding": "7.2.7"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.17",
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"versionEndExcluding": "7.3"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/cc7202a51b8777a757bda9dcfbf339f828c6a130"
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},
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{
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"url": "https://git.kernel.org/stable/c/dd8b1e808f5c19479e6ed47e2f88a1fd46f8b0e5"
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},
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{
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"url": "https://git.kernel.org/stable/c/93c6e5a8d7c5071d586c1411596d5db5faad22b2"
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},
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{
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"url": "https://git.kernel.org/stable/c/448ba0ae65ca61064183564d2983c9aa59bd6ba7"
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}
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],
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"title": "smb/client: invalidate fscache for fallocate range operations",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |