172 lines
9.3 KiB
JSON
172 lines
9.3 KiB
JSON
{
|
|
"dataType": "CVE_RECORD",
|
|
"dataVersion": "5.2",
|
|
"cveMetadata": {
|
|
"cveId": "CVE-2024-44992",
|
|
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"state": "PUBLISHED",
|
|
"assignerShortName": "Linux",
|
|
"dateReserved": "2024-08-21T05:34:56.671Z",
|
|
"datePublished": "2024-09-04T19:54:38.878Z",
|
|
"dateUpdated": "2026-08-05T11:37:32.018Z"
|
|
},
|
|
"containers": {
|
|
"cna": {
|
|
"providerMetadata": {
|
|
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"shortName": "Linux",
|
|
"dateUpdated": "2026-08-05T11:37:32.018Z"
|
|
},
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb/client: avoid possible NULL dereference in cifs_free_subrequest()\n\nClang static checker (scan-build) warning:\n\tcifsglob.h:line 890, column 3\n\tAccess to field 'ops' results in a dereference of a null pointer.\n\nCommit 519be989717c (\"cifs: Add a tracepoint to track credits involved in\nR/W requests\") adds a check for 'rdata->server', and let clang throw this\nwarning about NULL dereference.\n\nWhen 'rdata->credits.value != 0 && rdata->server == NULL' happens,\nadd_credits_and_wake_if() will call rdata->server->ops->add_credits().\nThis will cause NULL dereference problem. Add a check for 'rdata->server'\nto avoid NULL dereference."
|
|
}
|
|
],
|
|
"metrics": [
|
|
{
|
|
"cvssV3_1": {
|
|
"version": "3.1",
|
|
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
|
|
"baseScore": 7.5,
|
|
"baseSeverity": "HIGH"
|
|
},
|
|
"scenarios": [
|
|
{
|
|
"lang": "en",
|
|
"value": "AV:N - The precondition for the crash — `rdata->server` being NULL while credits are still held — is produced by SMB channel teardown paths (`cifs_chan_skip_or_disable()`, channel reconnect/disable) that are driven by the remote SMB server's responses and multichannel advertisements, so a malicious, compromised, or MITM'd SMB server reached over the network controls the trigger against a mounted client.\nAC:L - A hostile server controls both sides: it drives the reconnect/multichannel-disable that NULLs the channel and it controls response timing, so it can stall in-flight R/W subrequests to hold credits across the window at will. No memory-layout or victim-state condition outside the attacker's influence is needed.\nPR:N - A remote SMB server needs no account, credentials, or privileges on the victim client — the reconnect and channel-negotiation behaviour it abuses is part of normal connection maintenance on an established mount.\nUI:N - Against the common deployment of a persistent SMB mount (fstab/automount on servers, embedded and Android devices), the attacker acts on an already-mounted share with ordinary background readahead and writeback supplying the I/O; no victim action is required at attack time.\nS:U - The fault occurs in the CIFS client inside the kernel and its consequences stay within that same kernel's security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:N - The defect is a dereference of a NULL `server` pointer to reach `server->ops`, which faults immediately; no out-of-bounds or freed memory is read and no data is returned to the attacker.\nI:N - Nothing is written through the bad pointer — the code path faults on the read of `->ops` before any store, giving no write primitive or control-flow hijack on configurations with the standard non-zero `mmap_min_addr` and SMAP/PAN.\nA:H - The NULL dereference oopses the kernel in netfs subrequest-completion context, which is frequently a workqueue, killing writeback and rendering the mount unusable; the remote server can trigger it repeatedly."
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"affected": [
|
|
{
|
|
"product": "Linux",
|
|
"vendor": "Linux",
|
|
"defaultStatus": "unaffected",
|
|
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
|
"programFiles": [
|
|
"fs/smb/client/file.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "69c3c023af25edb5433a2db824d3e7cc328f0183",
|
|
"lessThan": "fead60a6d5f84b472b928502a42c419253afe6c1",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "69c3c023af25edb5433a2db824d3e7cc328f0183",
|
|
"lessThan": "74c2ab6d653b4c2354df65a7f7f2df1925a40a51",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
}
|
|
]
|
|
},
|
|
{
|
|
"product": "Linux",
|
|
"vendor": "Linux",
|
|
"defaultStatus": "affected",
|
|
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
|
|
"programFiles": [
|
|
"fs/smb/client/file.c"
|
|
],
|
|
"versions": [
|
|
{
|
|
"version": "6.10",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "0",
|
|
"lessThan": "6.10",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.10.7",
|
|
"lessThanOrEqual": "6.10.*",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.11",
|
|
"lessThanOrEqual": "*",
|
|
"status": "unaffected",
|
|
"versionType": "original_commit_for_fix"
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"cpeApplicability": [
|
|
{
|
|
"nodes": [
|
|
{
|
|
"operator": "OR",
|
|
"negate": false,
|
|
"cpeMatch": [
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "6.10",
|
|
"versionEndExcluding": "6.10.7"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "6.10",
|
|
"versionEndExcluding": "6.11"
|
|
}
|
|
]
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/fead60a6d5f84b472b928502a42c419253afe6c1"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/74c2ab6d653b4c2354df65a7f7f2df1925a40a51"
|
|
}
|
|
],
|
|
"title": "smb/client: avoid possible NULL dereference in cifs_free_subrequest()",
|
|
"x_generator": {
|
|
"engine": "bippy-1.2.0"
|
|
}
|
|
},
|
|
"adp": [
|
|
{
|
|
"metrics": [
|
|
{
|
|
"other": {
|
|
"type": "ssvc",
|
|
"content": {
|
|
"timestamp": "2024-09-04T20:19:34.019685Z",
|
|
"id": "CVE-2024-44992",
|
|
"options": [
|
|
{
|
|
"Exploitation": "none"
|
|
},
|
|
{
|
|
"Automatable": "no"
|
|
},
|
|
{
|
|
"Technical Impact": "partial"
|
|
}
|
|
],
|
|
"role": "CISA Coordinator",
|
|
"version": "2.0.3"
|
|
}
|
|
}
|
|
}
|
|
],
|
|
"title": "CISA ADP Vulnrichment",
|
|
"providerMetadata": {
|
|
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
|
|
"shortName": "CISA-ADP",
|
|
"dateUpdated": "2024-09-04T20:19:53.480Z"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
} |