CVE-2021-46971
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2021
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
perf/core: Fix unconditional security_locked_down() call
In the Linux kernel, the following vulnerability has been resolved: perf/core: Fix unconditional security_locked_down() call Currently, the lockdown state is queried unconditionally, even though its result is used only if the PERF_SAMPLE_REGS_INTR bit is set in attr.sample_type. While that doesn't matter in case of the Lockdown LSM, it causes trouble with the SELinux's lockdown hook implementation. SELinux implements the locked_down hook with a check whether the current task's type has the corresponding "lockdown" class permission ("integrity" or "confidentiality") allowed in the policy. This means that calling the hook when the access control decision would be ignored generates a bogus permission check and audit record. Fix this by checking sample_type first and only calling the hook when its result would be honored.
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) |
|---|---|---|---|---|---|
| b0c8fdc7fdb77586c3d1937050925b960743306e | affected | git | b246759284d6a2bc5b6f1009caeeb3abce2ec9ff | Unavailable | None listed |
| b0c8fdc7fdb77586c3d1937050925b960743306e | affected | git | 4348d3b5027bc3ff6336368b6c60605d4ef8e1ce | Unavailable | None listed |
| b0c8fdc7fdb77586c3d1937050925b960743306e | affected | git | f5809ca4c311b71bfaba6d13f4e39eab0557895e | Unavailable | None listed |
| b0c8fdc7fdb77586c3d1937050925b960743306e | affected | git | c7b0208ee370b89d20486fae71cd9abb759819c1 | Unavailable | None listed |
| b0c8fdc7fdb77586c3d1937050925b960743306e | affected | git | 08ef1af4de5fe7de9c6d69f1e22e51b66e385d9b | 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) |
|---|---|---|---|---|---|
| 5.4 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.4 | Unavailable | None listed |
| 5.4.117 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.35 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.11.19 | unaffected | semver | Unavailable | 5.11.* | None listed |
| 5.12.2 | unaffected | semver | Unavailable | 5.12.* | None listed |
| 5.13 | unaffected | original_commit_for_fix | Unavailable | * | None listed |