Debian Security Bug TrackerDEBIANCVE:CVE-2021-4001CVE-2021-4001
4.1 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N
4.7 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
COMPLETE
Availability Impact
NONE
AV:L/AC:M/Au:N/C:N/I:C/A:N
0.0004 Low
EPSS
Percentile
5.3%
A race condition was found in the Linux kernel’s ebpf verifier between bpf_map_update_elem and bpf_map_freeze due to a missing lock in kernel/bpf/syscall.c. In this flaw, a local user with a special privilege (cap_sys_admin or cap_bpf) can modify the frozen mapped address space. This flaw affects kernel versions prior to 5.16 rc2.
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| Debian | 12 | all | linux | < 5.15.5-1 | linux_5.15.5-1_all.deb |
| Debian | 11 | all | linux | < 5.10.84-1 | linux_5.10.84-1_all.deb |
| Debian | 10 | all | linux | < 4.19.249-2 | linux_4.19.249-2_all.deb |
| Debian | 999 | all | linux | < 5.15.5-1 | linux_5.15.5-1_all.deb |
| Debian | 13 | all | linux | < 5.15.5-1 | linux_5.15.5-1_all.deb |
Related
4.1 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N
4.7 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
COMPLETE
Availability Impact
NONE
AV:L/AC:M/Au:N/C:N/I:C/A:N
0.0004 Low
EPSS
Percentile
5.3%