CVE-2021-47276
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)
ftrace: Do not blindly read the ip address in ftrace_bug()
In the Linux kernel, the following vulnerability has been resolved: ftrace: Do not blindly read the ip address in ftrace_bug() It was reported that a bug on arm64 caused a bad ip address to be used for updating into a nop in ftrace_init(), but the error path (rightfully) returned -EINVAL and not -EFAULT, as the bug caused more than one error to occur. But because -EINVAL was returned, the ftrace_bug() tried to report what was at the location of the ip address, and read it directly. This caused the machine to panic, as the ip was not pointing to a valid memory address. Instead, read the ip address with copy_from_kernel_nofault() to safely access the memory, and if it faults, report that the address faulted, otherwise report what was in that location.
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) |
|---|---|---|---|---|---|
| 05736a427f7e16be948ccbf39782bd3a6ae16b14 | affected | git | 0bc62e398bbd9e600959e610def5109957437b28 | Unavailable | None listed |
| 05736a427f7e16be948ccbf39782bd3a6ae16b14 | affected | git | 4aedc2bc2b32c93555f47c95610efb89cc1ec09b | Unavailable | None listed |
| 05736a427f7e16be948ccbf39782bd3a6ae16b14 | affected | git | acf671ba79c1feccc3ec7cfdcffead4efcec49e7 | Unavailable | None listed |
| 05736a427f7e16be948ccbf39782bd3a6ae16b14 | affected | git | 862dcc14f2803c556bdd73b43c27b023fafce2fb | Unavailable | None listed |
| 05736a427f7e16be948ccbf39782bd3a6ae16b14 | affected | git | 7e4e824b109f1d41ccf223fbb0565d877d6223a2 | Unavailable | None listed |
| 05736a427f7e16be948ccbf39782bd3a6ae16b14 | affected | git | 97524384762c1fb9b3ded931498dd2047bd0de81 | Unavailable | None listed |
| 05736a427f7e16be948ccbf39782bd3a6ae16b14 | affected | git | 3e4ddeb68751fb4fb657199aed9cfd5d02796875 | Unavailable | None listed |
| 05736a427f7e16be948ccbf39782bd3a6ae16b14 | affected | git | 6c14133d2d3f768e0a35128faac8aa6ed4815051 | 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) |
|---|---|---|---|---|---|
| 2.6.28 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 2.6.28 | Unavailable | None listed |
| 4.4.273 | unaffected | semver | Unavailable | 4.4.* | None listed |
| 4.9.273 | unaffected | semver | Unavailable | 4.9.* | None listed |
| 4.14.237 | unaffected | semver | Unavailable | 4.14.* | None listed |
| 4.19.195 | unaffected | semver | Unavailable | 4.19.* | None listed |
| 5.4.126 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.44 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.12.11 | unaffected | semver | Unavailable | 5.12.* | None listed |
| 5.13 | unaffected | original_commit_for_fix | Unavailable | * | None listed |