275 lines
13 KiB
JSON
275 lines
13 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-2024-26936",
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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": "2024-02-19T14:20:24.196Z",
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"datePublished": "2024-05-01T05:26:51.773Z",
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"dateUpdated": "2026-08-05T11:28:27.772Z"
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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": "2026-08-05T11:28:27.772Z"
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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\nksmbd: validate request buffer size in smb2_allocate_rsp_buf()\n\nThe response buffer should be allocated in smb2_allocate_rsp_buf\nbefore validating request. But the fields in payload as well as smb2 header\nis used in smb2_allocate_rsp_buf(). This patch add simple buffer size\nvalidation to avoid potencial out-of-bounds in request buffer."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
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"baseScore": 8.2,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:N - The vulnerable code is in ksmbd, the in-kernel SMB server processing requests received on TCP port 445; the OOB read is driven entirely by fields in a remotely supplied SMB2 packet, making it remotely reachable over the network.\nAC:L - A single crafted SMB2 QUERY_INFO / transform request deterministically triggers the field read on an undersized buffer, with no race or unpredictable precondition the attacker cannot control.\nPR:N - In the affected code smb2_allocate_rsp_buf() runs before init_rsp_hdr and before check_user_session, and in the original ordering before decryption/session lookup, so a crafted (transform) request reaches the OOB read pre-authentication—consistent with the paired CVE-2024-26980.\nUI:N - The attacker sends the malformed request directly to the server; no action by any local user or victim is required.\nS:U - The out-of-bounds read stays within the kernel's own memory and security authority; no VM, hypervisor, IOMMU, or sandbox boundary is crossed.\nC:L - The read goes out of bounds by a couple of bytes (InfoType/FileInfoClass) of adjacent slab memory; it is strictly bounded to a few bytes and feeds only an internal size decision, so limited rather than arbitrary disclosure.\nI:N - The defect is purely an out-of-bounds read used to size the response buffer; there is no out-of-bounds write, freed-object reuse, or type confusion, so no data can be modified.\nA:H - Reading past a small slab allocation into a redzone or unmapped region produces a KASAN-detected slab-out-of-bounds and can oops/panic the kernel, and the request can be repeated at will, yielding a remote denial of service."
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}
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]
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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/server/smb2pdu.c"
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],
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{
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"version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
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"status": "affected",
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},
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"version": "0626e6641f6b467447c81dd7678a69c66f7746cf",
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{
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"product": "Linux",
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"defaultStatus": "affected",
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"programFiles": [
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"fs/smb/server/smb2pdu.c"
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],
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"versions": [
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{
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"version": "5.15",
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"status": "affected"
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{
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"version": "0",
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"lessThan": "5.15",
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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": "5.15.159",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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},
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"version": "6.1.88",
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"status": "unaffected",
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},
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"version": "6.6.29",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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},
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{
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"version": "6.8.8",
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"lessThanOrEqual": "6.8.*",
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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": "6.9",
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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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"cpeApplicability": [
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"title": "ksmbd: validate request buffer size in smb2_allocate_rsp_buf()",
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