CVE-2026-89965
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)
nvdimm/btt: reject an arena whose nfree is below the lane count
In the Linux kernel, the following vulnerability has been resolved: nvdimm/btt: reject an arena whose nfree is below the lane count The BTT info block's nfree field, the number of reserve free blocks, is read from the medium without validation. btt_freelist_init() and btt_rtt_init() size the per-lane freelist[] and rtt[] arrays by nfree, but the I/O path indexes them by the lane from nd_region_acquire_lane(), which is bounded by nd_region->num_lanes (ND_MAX_LANES), not by nfree. A crafted or foreign arena whose nfree is below the lane count makes freelist[lane]/rtt[lane] run past the allocation: an out-of-bounds write. btt.rst documents the nlanes = min(nfree, num_cpus) invariant, which the code does not currently honor: num_lanes is ND_MAX_LANES regardless of nfree. Reject an arena whose nfree is below num_lanes at discovery, before the per-lane arrays are allocated, enforcing that invariant.
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) |
|---|---|---|---|---|---|
| 5212e11fde4d40fa627668b4f2222d20db488f71 | affected | git | eb491343d2d1784121ad9af91c25b338c28913c3 | Unavailable | None listed |
| 5212e11fde4d40fa627668b4f2222d20db488f71 | affected | git | 59d5cd1f42b4bab3609512c3cb3d3540d3d21da7 | Unavailable | None listed |
| 5212e11fde4d40fa627668b4f2222d20db488f71 | affected | git | f6c5313aae794ecca8f762c1a3493de5c266f120 | Unavailable | None listed |
| 5212e11fde4d40fa627668b4f2222d20db488f71 | affected | git | f9bf05c63b77d000e9c01f3e47af36973887d350 | Unavailable | None listed |
| 5212e11fde4d40fa627668b4f2222d20db488f71 | affected | git | 6f79d1a5f2611a3d36e9312be5425cd9cb397c51 | Unavailable | None listed |
| 5212e11fde4d40fa627668b4f2222d20db488f71 | affected | git | 6b1faf1f099f7060b5f1f2f0d024132581f1726e | Unavailable | None listed |
| 5212e11fde4d40fa627668b4f2222d20db488f71 | affected | git | 9dfa11cef4750b67591307f2c62e47a23d60e4b7 | Unavailable | None listed |
| 5212e11fde4d40fa627668b4f2222d20db488f71 | affected | git | 6a1f2e5ed9267ca19187038ac635393c165213ac | 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) |
|---|---|---|---|---|---|
| 4.2 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 4.2 | Unavailable | None listed |
| 5.10.270 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.221 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.188 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.157 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.110 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.51 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.2.5 | unaffected | semver | Unavailable | 7.2.* | None listed |
| 7.3 | unaffected | original_commit_for_fix | Unavailable | * | None listed |