248 lines
12 KiB
JSON
248 lines
12 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-2024-35862",
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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": "2024-05-17T13:50:33.107Z",
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"datePublished": "2024-05-19T08:34:21.173Z",
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"dateUpdated": "2026-08-05T11:30:26.161Z"
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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": "2026-08-05T11:30:26.161Z"
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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 potential UAF in smb2_is_network_name_deleted()\n\nSkip sessions that are being teared down (status == SES_EXITING) to\navoid UAF."
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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:H/I:H/A:H",
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"baseScore": 9.8,
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"baseSeverity": "CRITICAL"
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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 function is invoked by the CIFS demultiplex thread on every SMB2 response received over TCP/445, keyed entirely on server-supplied fields (`Status` and `Id.SyncId.TreeId`). A malicious SMB server, or an off-path/MITM attacker injecting into an unsigned SMB connection, triggers it purely with network data.\nAC:L - The remote peer controls both sides of the race: it forces the session teardown (failed reconnect/session setup drives `__cifs_put_smb_ses()`), and it holds the SES_EXITING window open for the full request timeout simply by not answering the SMB2 LOGOFF, while flooding STATUS_NETWORK_NAME_DELETED responses. The attempt is freely repeatable with no attacker-uncontrollable precondition.\nPR:N - The attacker is the remote SMB peer and needs no credentials or privileges on the target Linux client; the code path runs in the kernel demux thread before any signature validation of the response.\nUI:N - The attack works against an already-established mount — an fstab/autofs/systemd-automount or DFS-referral connection, or a file server compromised or MITM'd after mount — and the server itself induces the session teardown, so no victim action is required.\nS:U - The use-after-free corrupts kernel slab memory within the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Use-after-free on `cifs_tcon`/`cifs_ses` gives an attacker-influenced read of freed slab contents, and `pr_warn_once(\"%s\", tcon->tree_name)` walks freed heap memory into the kernel log, leaking whatever now occupies that object.\nI:H - The path writes into freed memory — `spin_lock(&tcon->tc_lock)` plus `tcon->need_reconnect = true` — on an object the remote attacker selects via the controlled TreeId, giving a heap-spray-able corruption primitive leveragable for control-flow hijack.\nA:H - Dereferencing the poisoned/freed session and tcon produces a general protection fault or KASAN oops in the cifsd kernel thread (as shown in the sibling fix's trace), crashing or hanging the client with the mount unusable."
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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/client/smb2ops.c"
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],
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"versions": [
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{
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"version": "9e550b085206544bd03a8b1dd58a5414e9508351",
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"lessThan": "f9414004798d9742c1af23a1d839fe6a9503751c",
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"status": "affected",
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"versionType": "git"
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},
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{
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"status": "affected",
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"status": "affected",
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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": "5.12",
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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": "5.12",
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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": "6.1.85",
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"lessThanOrEqual": "6.1.*",
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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": "6.6.26",
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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": "6.8.5",
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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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],
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"cpeApplicability": [
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"nodes": [
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"operator": "OR",
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"negate": false,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "5.12",
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"versionEndExcluding": "6.1.85"
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"references": [
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"url": "https://git.kernel.org/stable/c/f9414004798d9742c1af23a1d839fe6a9503751c"
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}
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],
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"title": "smb: client: fix potential UAF in smb2_is_network_name_deleted()",
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"id": "CVE-2024-35862",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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