Vulnerability Name:

CVE-2021-4001 (CCN-217996)

Assigned:2021-11-15
Published:2021-11-15
Updated:2022-11-16
Summary: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.
CVSS v3 Severity:4.1 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N)
3.6 Low (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): High
Privileges Required (PR): High
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
5.5 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
4.8 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:4.7 Medium (CVSS v2 Vector: AV:L/AC:M/Au:N/C:N/I:C/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Complete
Availibility (A): None
4.6 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-367
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2021-4001

Source: MISC
Type: Issue Tracking, Patch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2025645

Source: XF
Type: UNKNOWN
linux-kernel-cve20214001-dos(217996)

Source: CCN
Type: Linux Kernel GIT Repository
bpf: Fix toctou on read-only map's constant scalar tracking

Source: MISC
Type: Patch, Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=353050be4c19e102178ccc05988101887c25ae53

Vulnerable Configuration:Configuration 1:
  • cpe:/o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*
  • OR cpe:/o:linux:linux_kernel:*:*:*:*:*:*:*:* (Version <= 5.15)

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:95078
    P
    		reiserfs-kmp-default-5.14.21-150400.22.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:3567
    P
    		kernel-default-extra-5.14.21-150400.22.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:3398
    P
    		kernel-docs-5.14.21-150400.22.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:95083
    P
    		kernel-azure-5.14.21-150400.12.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:94590
    P
    		kernel-64kb-5.14.21-150400.22.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:3448
    P
    		reiserfs-kmp-default-5.14.21-150400.22.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:95197
    P
    		kernel-default-extra-5.14.21-150400.22.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:95028
    P
    		kernel-docs-5.14.21-150400.22.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:3453
    P
    		kernel-azure-5.14.21-150400.12.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:2960
    P
    		kernel-64kb-5.14.21-150400.22.1 on GA media (Moderate)
    2022-06-22
    oval:org.opensuse.security:def:3743
    P
    		Recommended update for aws-efs-utils, python-ansi2html, python-py, python-pytest-html, python-pytest-metadata, python-pytest-rerunfailures, python-coverage, python-oniconfig, python-unittest-mixins (Moderate) (in QA)
    2022-05-24
    oval:org.opensuse.security:def:102030
    P
    		Security update for the Linux Kernel (Live Patch 3 for SLE 15 SP3) (Important)
    2022-03-29
    oval:org.opensuse.security:def:1450
    P
    		Security update for the Linux Kernel (Live Patch 3 for SLE 15 SP3) (Important)
    2022-03-29
    oval:org.opensuse.security:def:102034
    P
    		Security update for the Linux Kernel (Live Patch 7 for SLE 15 SP3) (Important)
    2022-03-29
    oval:org.opensuse.security:def:102027
    P
    		Security update for the Linux Kernel (Live Patch 1 for SLE 15 SP3) (Important)
    2022-03-29
    oval:org.opensuse.security:def:1454
    P
    		Security update for the Linux Kernel (Live Patch 7 for SLE 15 SP3) (Important)
    2022-03-29
    oval:org.opensuse.security:def:1447
    P
    		Security update for the Linux Kernel (Live Patch 1 for SLE 15 SP3) (Important)
    2022-03-29
    oval:org.opensuse.security:def:102031
    P
    		Security update for the Linux Kernel (Live Patch 5 for SLE 15 SP3) (Important)
    2022-03-29
    oval:org.opensuse.security:def:1451
    P
    		Security update for the Linux Kernel (Live Patch 5 for SLE 15 SP3) (Important)
    2022-03-29
    oval:org.opensuse.security:def:102035
    P
    		Security update for the Linux Kernel (Live Patch 10 for SLE 15 SP3) (Important)
    2022-03-29
    oval:org.opensuse.security:def:102028
    P
    		Security update for the Linux Kernel (Live Patch 2 for SLE 15 SP3) (Important)
    2022-03-29
    oval:org.opensuse.security:def:1455
    P
    		Security update for the Linux Kernel (Live Patch 10 for SLE 15 SP3) (Important)
    2022-03-29
    oval:org.opensuse.security:def:1448
    P
    		Security update for the Linux Kernel (Live Patch 2 for SLE 15 SP3) (Important)
    2022-03-29
    oval:org.opensuse.security:def:102032
    P
    		Security update for the Linux Kernel (Live Patch 4 for SLE 15 SP3) (Important)
    2022-03-29
    oval:org.opensuse.security:def:101949
    P
    		Security update for the Linux Kernel (Live Patch 9 for SLE 15 SP3) (Important)
    2022-03-29
    oval:org.opensuse.security:def:1452
    P
    		Security update for the Linux Kernel (Live Patch 4 for SLE 15 SP3) (Important)
    2022-03-29
    oval:org.opensuse.security:def:1296
    P
    		Security update for the Linux Kernel (Live Patch 9 for SLE 15 SP3) (Important)
    2022-03-29
    oval:org.opensuse.security:def:102029
    P
    		Security update for the Linux Kernel (Live Patch 0 for SLE 15 SP3) (Important)
    2022-03-29
    oval:org.opensuse.security:def:1449
    P
    		Security update for the Linux Kernel (Live Patch 0 for SLE 15 SP3) (Important)
    2022-03-29
    oval:org.opensuse.security:def:102033
    P
    		Security update for the Linux Kernel (Live Patch 6 for SLE 15 SP3) (Important)
    2022-03-29
    oval:org.opensuse.security:def:1453
    P
    		Security update for the Linux Kernel (Live Patch 6 for SLE 15 SP3) (Important)
    2022-03-29
    oval:org.opensuse.security:def:42189
    P
    		Security update for the Linux Kernel (Important)
    2022-01-26
    oval:org.opensuse.security:def:42186
    P
    		Security update for the Linux Kernel (Important)
    2022-01-25
    oval:org.opensuse.security:def:1316
    P
    		Security update for the Linux Kernel (Important)
    2022-01-19
    oval:org.opensuse.security:def:101837
    P
    		Security update for the Linux Kernel (Important)
    2022-01-19
    oval:org.opensuse.security:def:99198
    P
    		 (Important)
    2022-01-19
    oval:org.opensuse.security:def:1159
    P
    		Security update for the Linux Kernel (Important)
    2022-01-19
    oval:org.opensuse.security:def:100400
    P
    		 (Important)
    2022-01-19
    oval:org.opensuse.security:def:102306
    P
    		Security update for the Linux Kernel (Important)
    2022-01-19
    oval:org.opensuse.security:def:101892
    P
    		Security update for the Linux Kernel (Important)
    2022-01-19
    oval:org.opensuse.security:def:1748
    P
    		Security update for the Linux Kernel (Important)
    2022-01-19
    oval:org.opensuse.security:def:99472
    P
    		 (Important)
    2022-01-19
    oval:org.opensuse.security:def:1232
    P
    		Security update for the Linux Kernel (Important)
    2022-01-19
    oval:org.opensuse.security:def:100734
    P
    		 (Important)
    2022-01-19
    oval:org.opensuse.security:def:102351
    P
    		Security update for the Linux Kernel (Important)
    2022-01-19
    oval:org.opensuse.security:def:1799
    P
    		Security update for the Linux Kernel (Important)
    2022-01-19
    oval:org.opensuse.security:def:99734
    P
    		 (Important)
    2022-01-19
    oval:org.opensuse.security:def:101590
    P
    		Security update for the Linux Kernel (Important)
    2022-01-19
    oval:org.opensuse.security:def:859
    P
    		Security update for the Linux Kernel (Important)
    2022-01-19
    oval:org.opensuse.security:def:42268
    P
    		Security update for the Linux Kernel (Important)
    2022-01-19
    oval:org.opensuse.security:def:101969
    P
    		Security update for the Linux Kernel (Important)
    2022-01-19
    oval:org.opensuse.security:def:100062
    P
    		 (Important)
    2022-01-19
    oval:org.opensuse.security:def:102159
    P
    		Security update for the Linux Kernel (Important)
    2022-01-14
    oval:org.opensuse.security:def:1602
    P
    		Security update for the Linux Kernel (Important)
    2022-01-14
    oval:org.opensuse.security:def:42355
    P
    		Security update for the Linux Kernel (Important)
    2022-01-14
    oval:org.opensuse.security:def:68809
    P
    		Security update for the Linux Kernel (Important)
    2022-01-14
    oval:org.opensuse.security:def:7720
    P
    		Security update for the Linux Kernel (Important)
    2022-01-14
    oval:org.opensuse.security:def:68682
    P
    		Security update for the Linux Kernel (Important)
    2022-01-11
    oval:org.opensuse.security:def:76456
    P
    		Security update for the Linux Kernel (Important)
    2022-01-11
    oval:org.opensuse.security:def:7593
    P
    		Security update for the Linux Kernel (Important)
    2022-01-11
    oval:org.opensuse.security:def:111873
    P
    		Security update for the Linux Kernel (Important)
    2022-01-11
    oval:org.opensuse.security:def:67388
    P
    		Security update for the Linux Kernel (Important)
    2022-01-11
    oval:org.opensuse.security:def:6299
    P
    		Security update for the Linux Kernel (Important)
    2022-01-11
    oval:org.opensuse.security:def:102125
    P
    		Security update for the Linux Kernel (Important)
    2022-01-11
    oval:org.opensuse.security:def:1564
    P
    		Security update for the Linux Kernel (Important)
    2022-01-11
    oval:org.opensuse.security:def:68387
    P
    		Security update for the Linux Kernel (Important) (in QA)
    2022-01-07
    oval:org.opensuse.security:def:76445
    P
    		Security update for the Linux Kernel (Important) (in QA)
    2022-01-07
    oval:org.opensuse.security:def:7298
    P
    		Security update for the Linux Kernel (Important) (in QA)
    2022-01-07
    oval:org.opensuse.security:def:111858
    P
    		Security update for the Linux Kernel (Important) (in QA)
    2022-01-07
    oval:org.opensuse.security:def:67377
    P
    		Security update for the Linux Kernel (Important) (in QA)
    2022-01-07
    oval:org.opensuse.security:def:10710
    P
    		Security update for the Linux Kernel (Important) (in QA)
    2022-01-07
    oval:org.opensuse.security:def:6288
    P
    		Security update for the Linux Kernel (Important) (in QA)
    2022-01-07
    oval:org.opensuse.security:def:73954
    P
    		Security update for the Linux Kernel (Important) (in QA)
    2022-01-07
    oval:org.opensuse.security:def:64832
    P
    		Security update for the Linux Kernel (Important) (in QA)
    2022-01-07
    oval:org.opensuse.security:def:67580
    P
    		Security update for the Linux Kernel (Important) (in QA)
    2022-01-07
    oval:org.opensuse.security:def:74758
    P
    		Security update for the Linux Kernel (Important) (in QA)
    2022-01-07
    oval:org.opensuse.security:def:6491
    P
    		Security update for the Linux Kernel (Important) (in QA)
    2022-01-07
    oval:org.opensuse.security:def:70850
    P
    		Security update for the Linux Kernel (Important) (in QA)
    2022-01-07
    oval:org.opensuse.security:def:65690
    P
    		Security update for the Linux Kernel (Important) (in QA)
    2022-01-07
    oval:org.opensuse.security:def:8402
    P
    		Security update for the Linux Kernel (Important) (in QA)
    2022-01-07
    oval:org.opensuse.security:def:4601
    P
    		Security update for the Linux Kernel (Important) (in QA)
    2022-01-07
    BACK
    linux linux kernel 5.16 rc1
    linux linux kernel *