CVE-2026-93186
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
cxl/mbox: Clamp mailbox output allocation to the payload size
In the Linux kernel, the following vulnerability has been resolved: cxl/mbox: Clamp mailbox output allocation to the payload size CXL_MEM_SEND_COMMAND bounds the user's in.size to the mailbox payload size but leaves out.size unbounded, then cxl_mbox_cmd_ctor() calls kvzalloc(out.size). A large out.size drives a huge allocation, above INT_MAX it WARNs and taints, and with panic_on_warn=1 it panics. The transport __cxl_pci_mbox_send_cmd() already clamps the response copy to min(out.size, payload_size, device len), so the output buffer is never written beyond payload_size. Clamp the allocation to payload_size too, matching the RAW path.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 583fa5e71caeb79e04e477e9837e2f7fa53b71e4 | affected | git | d2d40574b9b272ade32d0d77b140d990e7547f5f | Unavailable | None listed |
| 583fa5e71caeb79e04e477e9837e2f7fa53b71e4 | affected | git | f5d2bbf0300f46307948864fbb97bce5097f4fe2 | Unavailable | None listed |
| 583fa5e71caeb79e04e477e9837e2f7fa53b71e4 | affected | git | 31d4841eca7c4b75751ca96d24339e19303337f2 | Unavailable | None listed |
| 583fa5e71caeb79e04e477e9837e2f7fa53b71e4 | affected | git | b4e11c731d6bee3b87315e055a1ca417c92dc1fc | Unavailable | None listed |
| 583fa5e71caeb79e04e477e9837e2f7fa53b71e4 | affected | git | 8a13db9f899d149c3aab24abcb668121cfda5a4f | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 5.12 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.12 | Unavailable | None listed |
| 6.6.160 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.110 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.52 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.2.6 | unaffected | semver | Unavailable | 7.2.* | None listed |
| 7.3 | unaffected | original_commit_for_fix | Unavailable | * | None listed |