GHSA-QM76-89X6-CMQM
Vulnerability from github – Published: 2026-10-06 09:31 – Updated: 2026-10-06 09:31In the Linux kernel, the following vulnerability has been resolved:
Input: rmi_smbus - fix out-of-bounds read in rmi_smb_write_block()
When chunking writes into SMBus blocks in rmi_smb_write_block(), the loop calculates block_len using the original total length (len) instead of the remaining length (cur_len).
If len is greater than 32 bytes (SMB_MAX_COUNT), block_len remains 32 for every iteration, even on the final partial chunk where fewer than 32 bytes remain. This causes smb_block_write() to read 32 bytes from the advanced data buffer pointer, reading past the end of the input buffer.
Fix this by calculating block_len using cur_len and advancing the buffer and address pointers by block_len.
{
"affected": [],
"aliases": [
"CVE-2026-98204"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-10-06T09:18:06Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: rmi_smbus - fix out-of-bounds read in rmi_smb_write_block()\n\nWhen chunking writes into SMBus blocks in rmi_smb_write_block(), the\nloop calculates block_len using the original total length (len) instead\nof the remaining length (cur_len).\n\nIf len is greater than 32 bytes (SMB_MAX_COUNT), block_len remains 32\nfor every iteration, even on the final partial chunk where fewer than 32\nbytes remain. This causes smb_block_write() to read 32 bytes from the\nadvanced data buffer pointer, reading past the end of the input buffer.\n\nFix this by calculating block_len using cur_len and advancing the buffer\nand address pointers by block_len.",
"id": "GHSA-qm76-89x6-cmqm",
"modified": "2026-10-06T09:31:30Z",
"published": "2026-10-06T09:31:30Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98204"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/29fbcf5834f0a7f74bfd017c07da2411b35a4e2a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/50dd585bee7669eb165e5defcc35d17f3822cfbb"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/51cfe54f815ae175c7d1126b983d4d7c89715004"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7c800af1c6030a5f27d46ce7d6d5d75f9c1efaf8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9f0ce5e162eed8b68345abe839c59768bc60f99a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d01337c0892d1509500c727edf81380777c2dd0f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/dc05ec97b8299e48e31367a9bc412c7e9c0e2b42"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e022538e13dd1c82af5ec25ac28f12ca0ab26160"
}
],
"schema_version": "1.4.0",
"severity": []
}
Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
Loading timeline…
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.