CVE-2021-46966
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)
ACPI: custom_method: fix potential use-after-free issue
In the Linux kernel, the following vulnerability has been resolved: ACPI: custom_method: fix potential use-after-free issue In cm_write(), buf is always freed when reaching the end of the function. If the requested count is less than table.length, the allocated buffer will be freed but subsequent calls to cm_write() will still try to access it. Remove the unconditional kfree(buf) at the end of the function and set the buf to NULL in the -EINVAL error path to match the rest of function.
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) |
|---|---|---|---|---|---|
| 4bda2b79a9d04c8ba31681c66e95877dbb433416 | affected | git | 1d53ca5d131074c925ce38361fb0376d3bf7e394 | Unavailable | None listed |
| 5c12dadcbef8cd55ef1f5dac799bfcbb7ea7db1d | affected | git | 8b04d57f30caf76649d0567551589af9a66ca9be | Unavailable | None listed |
| 35b88a10535edcf62d3e6b7893a8cd506ff98a24 | affected | git | 90575d1d9311b753cf1718f4ce9061ddda7dfd23 | Unavailable | None listed |
| e4467fb6ef547aa352dc03397f9474ec84eced5b | affected | git | a5b26a2e362f572d87e9fd35435680e557052a17 | Unavailable | None listed |
| 03d1571d9513369c17e6848476763ebbd10ec2cb | affected | git | 72814a94c38a33239793f7622cec6ace1e540c4b | Unavailable | None listed |
| 03d1571d9513369c17e6848476763ebbd10ec2cb | affected | git | 62dc2440ebb552aa0d7f635e1697e077d9d21203 | Unavailable | None listed |
| 03d1571d9513369c17e6848476763ebbd10ec2cb | affected | git | f16737caf41fc06cfe6e49048becb09657074d4b | Unavailable | None listed |
| 03d1571d9513369c17e6848476763ebbd10ec2cb | affected | git | b7a5baaae212a686ceb812c32fceed79c03c0234 | Unavailable | None listed |
| 03d1571d9513369c17e6848476763ebbd10ec2cb | affected | git | e483bb9a991bdae29a0caa4b3a6d002c968f94aa | Unavailable | None listed |
| 70424999fbf1f160ade111cb9baab51776e0f9c2 | affected | git | Unavailable | Unavailable | None listed |
| 06cd4a06eb596a888239fb8ceb6ea15677cab396 | affected | git | Unavailable | Unavailable | None listed |
| 4.4.195 | affected | semver | 4.4.269 | Unavailable | None listed |
| 4.9.195 | affected | semver | 4.9.269 | Unavailable | None listed |
| 4.14.147 | affected | semver | 4.14.233 | Unavailable | None listed |
| 4.19.77 | affected | semver | 4.19.191 | Unavailable | None listed |
| 5.2.19 | affected | semver | 5.3 | Unavailable | None listed |
| 5.3.4 | affected | semver | 5.4 | 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 |
| 4.4.269 | unaffected | semver | Unavailable | 4.4.* | None listed |
| 4.9.269 | unaffected | semver | Unavailable | 4.9.* | None listed |
| 4.14.233 | unaffected | semver | Unavailable | 4.14.* | None listed |
| 4.19.191 | unaffected | semver | Unavailable | 4.19.* | None listed |
| 5.4.118 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.36 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.11.20 | unaffected | semver | Unavailable | 5.11.* | None listed |
| 5.12.3 | unaffected | semver | Unavailable | 5.12.* | None listed |
| 5.13 | unaffected | original_commit_for_fix | Unavailable | * | None listed |