CVE-2026-45851
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)
efi: Fix reservation of unaccepted memory table
In the Linux kernel, the following vulnerability has been resolved: efi: Fix reservation of unaccepted memory table The reserve_unaccepted() function incorrectly calculates the size of the memblock reservation for the unaccepted memory table. It aligns the size of the table, but fails to account for cases where the table's starting physical address (efi.unaccepted) is not page-aligned. If the table starts at an offset within a page and its end crosses into a subsequent page that the aligned size does not cover, the end of the table will not be reserved. This can lead to the table being overwritten or inaccessible, causing a kernel panic in accept_memory(). This issue was observed when starting Intel TDX VMs with specific memory sizes (e.g., > 64GB). Fix this by calculating the end address first (including the unaligned start) and then aligning it up, ensuring the entire range is covered by the reservation.
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) |
|---|---|---|---|---|---|
| 8dbe33956d96c9d066ef15ca933ede30748198b2 | affected | git | b7bc182ec1846be437351e44164089d988f9d0dd | Unavailable | None listed |
| 8dbe33956d96c9d066ef15ca933ede30748198b2 | affected | git | ba6b6f1502fa55621d1db23f253d54322bdbe4e0 | Unavailable | None listed |
| 8dbe33956d96c9d066ef15ca933ede30748198b2 | affected | git | 9b18bf59977f5c5bc3b11b210520f62500a7adf3 | Unavailable | None listed |
| 8dbe33956d96c9d066ef15ca933ede30748198b2 | affected | git | e649b5916725c68f44ebf45fb396df563c5dbaf2 | Unavailable | None listed |
| 8dbe33956d96c9d066ef15ca933ede30748198b2 | affected | git | 0862438c90487e79822d5647f854977d50381505 | 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) |
|---|---|---|---|---|---|
| 6.6 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 6.6 | Unavailable | None listed |
| 6.6.128 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.75 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.14 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 6.19.4 | unaffected | semver | Unavailable | 6.19.* | None listed |
| 7.0 | unaffected | original_commit_for_fix | Unavailable | * | None listed |