CVE-2022-49077
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2022
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
mmmremap.c: avoid pointless invalidate_range_start/end on mremap(old_size=0)
In the Linux kernel, the following vulnerability has been resolved: mmmremap.c: avoid pointless invalidate_range_start/end on mremap(old_size=0) If an mremap() syscall with old_size=0 ends up in move_page_tables(), it will call invalidate_range_start()/invalidate_range_end() unnecessarily, i.e. with an empty range. This causes a WARN in KVM's mmu_notifier. In the past, empty ranges have been diagnosed to be off-by-one bugs, hence the WARNing. Given the low (so far) number of unique reports, the benefits of detecting more buggy callers seem to outweigh the cost of having to fix cases such as this one, where userspace is doing something silly. In this particular case, an early return from move_page_tables() is enough to fix the issue.
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) |
|---|---|---|---|---|---|
| 7b6efc2bc4f19952b25ebf9b236e5ac43cd386c2 | affected | git | a05540f3903bd8295e8c4cd90dd3d416239a115b | Unavailable | None listed |
| 7b6efc2bc4f19952b25ebf9b236e5ac43cd386c2 | affected | git | eeaf28e2a0128147d687237e59d5407ee1b14693 | Unavailable | None listed |
| 7b6efc2bc4f19952b25ebf9b236e5ac43cd386c2 | affected | git | e2c328c2a8f9de8b761bd4025b66c63120c55761 | Unavailable | None listed |
| 7b6efc2bc4f19952b25ebf9b236e5ac43cd386c2 | affected | git | c19d8de4e682ec4b0ea2b04a832cd8cc0be3bb31 | Unavailable | None listed |
| 7b6efc2bc4f19952b25ebf9b236e5ac43cd386c2 | affected | git | 7d659cb1763ff17d1c6ee082fa6feb4267c7a30b | Unavailable | None listed |
| 7b6efc2bc4f19952b25ebf9b236e5ac43cd386c2 | affected | git | a04cb99c5d4668fe3f5c0e5b6da1cecd34c3f219 | Unavailable | None listed |
| 7b6efc2bc4f19952b25ebf9b236e5ac43cd386c2 | affected | git | 2358aa84ef6dafcf544a557caaa6b91afb4a0bd2 | Unavailable | None listed |
| 7b6efc2bc4f19952b25ebf9b236e5ac43cd386c2 | affected | git | 04bc13dae4a27b8d030843c85ae452bb2f1d9c1f | Unavailable | None listed |
| 7b6efc2bc4f19952b25ebf9b236e5ac43cd386c2 | affected | git | 01e67e04c28170c47700c2c226d732bbfedb1ad0 | 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) |
|---|---|---|---|---|---|
| 3.2 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 3.2 | Unavailable | None listed |
| 4.9.311 | unaffected | semver | Unavailable | 4.9.* | None listed |
| 4.14.276 | unaffected | semver | Unavailable | 4.14.* | None listed |
| 4.19.238 | unaffected | semver | Unavailable | 4.19.* | None listed |
| 5.4.189 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.111 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.34 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 5.16.20 | unaffected | semver | Unavailable | 5.16.* | None listed |
| 5.17.3 | unaffected | semver | Unavailable | 5.17.* | None listed |
| 5.18 | unaffected | original_commit_for_fix | Unavailable | * | None listed |