CVE-2026-64034
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)
net: mana: Fix TOCTOU double-fetch of hwc_msg_id from DMA buffer
In the Linux kernel, the following vulnerability has been resolved: net: mana: Fix TOCTOU double-fetch of hwc_msg_id from DMA buffer In mana_hwc_rx_event_handler(), resp->response.hwc_msg_id is read from DMA-coherent memory and bounds-checked, then mana_hwc_handle_resp() re-reads the same field from the same DMA buffer for test_bit() and pointer arithmetic. DMA-coherent memory is mapped uncacheable on x86 and is shared, unencrypted, in Confidential VMs (SEV-SNP/TDX), so each load goes directly to host-visible memory. A H/W can modify the value between the check and the use, bypassing the bounds validation. Fix this by reading hwc_msg_id exactly once using READ_ONCE() into a stack-local variable in mana_hwc_rx_event_handler(), and passing the validated value as a parameter to mana_hwc_handle_resp().
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) |
|---|---|---|---|---|---|
| ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f | affected | git | a201c66edf2ebc6cfdc3813a889ba20fecebfae3 | Unavailable | None listed |
| ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f | affected | git | 70ad2dff8d052a85dfef15715b531f38a29108cf | Unavailable | None listed |
| ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f | affected | git | 566f42fb67a7ebfed6650e407e5b72e6b3e83bf7 | Unavailable | None listed |
| ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f | affected | git | 6180a06bbc99fd9114b8db4be6c4d46e40f046ef | Unavailable | None listed |
| ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f | affected | git | 09ec063d87c2dd3fa6f3561361a017bd882e9f37 | Unavailable | None listed |
| ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f | affected | git | 3c4db56ccd13dd020fbf43afabaee74a40ec75e4 | Unavailable | None listed |
| ca9c54d2d6a5ab2430c4eda364c77125d62e5e0f | affected | git | 35f0f0a2536a4d604b4dbad92c85c4a8fdebb870 | 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) |
|---|---|---|---|---|---|
| 5.13 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.13 | Unavailable | None listed |
| 5.15.209 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.175 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.142 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.92 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.34 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.0.11 | unaffected | semver | Unavailable | 7.0.* | None listed |
| 7.1 | unaffected | original_commit_for_fix | Unavailable | * | None listed |