164 lines
8.1 KiB
JSON
164 lines
8.1 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-2026-99274",
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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": "2026-09-25T10:25:14.405Z",
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"datePublished": "2026-11-07T14:08:45.924Z",
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"dateUpdated": "2026-11-10T18:15:27.974Z"
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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": "2026-11-10T18:15:27.974Z"
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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: fix fiemap wild read on empty truncated response\n\nsmb3_fiemap() treats -E2BIG from SMB2_ioctl() as a truncated range blob\nand loops for the next chunk. If the server reports\nSTATUS_BUFFER_OVERFLOW with OutputCount == 0, SMB2_ioctl() returns\n-E2BIG with out_data == NULL and out_data_len == 0, and the existing\nlength checks accept the empty result. The loop then evaluates\n\n\tnext = out_data[num - 1].file_offset + ...\n\nwith num == 0, reading 16 bytes before NULL.\n\nReject a truncated range blob that contains no range, so the resume\noffset is never computed from an empty response. Also require the last\nrange in a truncated blob to advance the resume offset without\noverflowing, and to stay within the requested range; a malicious or\nbroken server could otherwise make no progress or underflow len and loop\nforever. Free the previous response buffer before retrying.\n\nReproduced on 6.6.87.2 with a malicious SMB2 server that answers\nFSCTL_QUERY_ALLOCATED_RANGES with STATUS_BUFFER_OVERFLOW and\nOutputCount == 0; an FS_IOC_FIEMAP ioctl on the mount oopses in\ncifs_fiemap() with CR2 = fffffffffffffff8. The code path is unchanged\non mainline."
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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": "2f3ebaba13cebd8badfb9aed31c0cf3cc82eb4f4",
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"lessThan": "8e0d425b808c367f5033eb72aa4528ae18473627",
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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": "2f3ebaba13cebd8badfb9aed31c0cf3cc82eb4f4",
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"lessThan": "4a426ca5be7e3dedbe76575b967db04fbf01136f",
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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": "2f3ebaba13cebd8badfb9aed31c0cf3cc82eb4f4",
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"lessThan": "31f6dbb29fe17fa9595c7e8b19fd92915b03a4ca",
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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": "2f3ebaba13cebd8badfb9aed31c0cf3cc82eb4f4",
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"lessThan": "f5baa17a0f316c235d61623ac8e8fb32c2b3c0cc",
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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": "5.2",
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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": "5.2",
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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": "6.12.117",
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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": "6.18.61",
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"lessThanOrEqual": "6.18.*",
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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": "7.3.2",
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"lessThanOrEqual": "7.3.*",
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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": "7.4-rc1",
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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": "5.2",
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"versionEndExcluding": "6.12.117"
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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": "5.2",
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"versionEndExcluding": "6.18.61"
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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": "5.2",
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"versionEndExcluding": "7.3.2"
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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": "5.2",
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"versionEndExcluding": "7.4-rc1"
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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/8e0d425b808c367f5033eb72aa4528ae18473627"
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},
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{
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"url": "https://git.kernel.org/stable/c/4a426ca5be7e3dedbe76575b967db04fbf01136f"
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},
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{
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"url": "https://git.kernel.org/stable/c/31f6dbb29fe17fa9595c7e8b19fd92915b03a4ca"
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},
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{
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"url": "https://git.kernel.org/stable/c/f5baa17a0f316c235d61623ac8e8fb32c2b3c0cc"
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}
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],
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"title": "smb: client: fix fiemap wild read on empty truncated response",
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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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} |