VDB
ALPINE-CVE-2021-20254
ALPINE-CVE-2021-20254
PUBLISHED
CVSS 6.800000190734863 MEDIUM
A flaw was found in samba. The Samba smbd file server must map Windows group identities (SIDs) into unix group ids (gids). The code that performs this had a flaw that could allow it to read data beyond the end of the array in the case where a negative cache entry had been added to the mapping cache. This could cause the calling code to return those values into the process token that stores the group membership for a user. The highest threat from this vulnerability is to data confidentiality and integrity.
Risk Scores
CVSS 3.1
6.800000190734863
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Alpine:v3.19 | samba | 3.6.0, 3.6.15-r0, 3.6.13-r0 |
| Alpine:v3.18 | samba | 3.3.5-r1, 3.3.4-r0, 3.2.8-r1 |
| Alpine:v3.12 | samba | 3.6.0, 4.2.3-r1, 3.3.6-r0 |
| Alpine:v3.17 | samba | 3.5.6-r0, 3.2.10-r0, 3.2.11-r0 |
| Alpine:v3.13 | samba | 3.6.0, 4.11.2-r0, 4.11.6-r0 |
| Alpine:v3.15 | samba | 3.5.8-r0, 4.12.0-r0, 3.2.10-r0 |
| Alpine:v3.21 | samba | 4.10.8-r0, 0, 3.2.10-r0 |
| Alpine:v3.20 | samba | 3.2.10-r0, 3.6.13-r0, 3.6.0 |
| Alpine:v3.22 | samba | 3.2.8-r1, 0, 3.2.10-r0 |
| Alpine:v3.14 | samba | 3.6.19-r0, 0, 3.5.2-r0 |
| Alpine:v3.24 | samba | 0, 3.6.0 |
| Alpine:v3.16 | samba | 3.5.10-r0, 3.6.0, 4.1.5-r1 |
| Alpine:v3.23 | samba | 4.2.3-r3, 4.6.1-r1, 3.6.0 |
Timeline
- May 5, 2021 CVE Published
- Jul 8, 2026 CVE Updated
- Aug 8, 2026 Distribution Patch