CVE-2022-49989
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)
xen/privcmd: fix error exit of privcmd_ioctl_dm_op()
In the Linux kernel, the following vulnerability has been resolved: xen/privcmd: fix error exit of privcmd_ioctl_dm_op() The error exit of privcmd_ioctl_dm_op() is calling unlock_pages() potentially with pages being NULL, leading to a NULL dereference. Additionally lock_pages() doesn't check for pin_user_pages_fast() having been completely successful, resulting in potentially not locking all pages into memory. This could result in sporadic failures when using the related memory in user mode. Fix all of that by calling unlock_pages() always with the real number of pinned pages, which will be zero in case pages being NULL, and by checking the number of pages pinned by pin_user_pages_fast() matching the expected number of pages.
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) |
|---|---|---|---|---|---|
| ab520be8cd5d56867fc95cfbc34b90880faf1f9d | affected | git | 6de50db104af0dc921f593fd95c55db86a52ceef | Unavailable | None listed |
| ab520be8cd5d56867fc95cfbc34b90880faf1f9d | affected | git | c2b7bae7c90051fd6a679d5dee00400d67ebbf4a | Unavailable | None listed |
| ab520be8cd5d56867fc95cfbc34b90880faf1f9d | affected | git | 45d47bd9b96e7874b98dbcc7602fe2826c5d62a6 | Unavailable | None listed |
| ab520be8cd5d56867fc95cfbc34b90880faf1f9d | affected | git | c5deb27895e017a0267de0a20d140ad5fcc55a54 | 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) |
|---|---|---|---|---|---|
| 4.11 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 4.11 | Unavailable | None listed |
| 5.10.140 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.64 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 5.19.6 | unaffected | semver | Unavailable | 5.19.* | None listed |
| 6.0 | unaffected | original_commit_for_fix | Unavailable | * | None listed |