CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
14.2%
BPF JIT compilers in the Linux kernel through 5.11.12 have incorrect
computation of branch displacements, allowing them to execute arbitrary
code within the kernel context. This affects arch/x86/net/bpf_jit_comp.c
and arch/x86/net/bpf_jit_comp32.c.
Author | Note |
---|---|
sbeattie | this issue is priority medium for trusty/3.13 kernels, as unprivileged BPF was not yet available in the Linux kernel of that era. |
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 18.04 | noarch | linux | < 4.15.0-142.146 | UNKNOWN |
ubuntu | 20.04 | noarch | linux | < 5.4.0-72.80 | UNKNOWN |
ubuntu | 20.10 | noarch | linux | < 5.8.0-50.56 | UNKNOWN |
ubuntu | 14.04 | noarch | linux | < any | UNKNOWN |
ubuntu | 16.04 | noarch | linux | < 4.4.0-209.241 | UNKNOWN |
ubuntu | 18.04 | noarch | linux-aws | < 4.15.0-1099.106 | UNKNOWN |
ubuntu | 20.04 | noarch | linux-aws | < 5.4.0-1045.47 | UNKNOWN |
ubuntu | 20.10 | noarch | linux-aws | < 5.8.0-1030.32 | UNKNOWN |
ubuntu | 14.04 | noarch | linux-aws | < 4.4.0-1091.95 | UNKNOWN |
ubuntu | 16.04 | noarch | linux-aws | < 4.4.0-1127.141 | UNKNOWN |
git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/patch/?id=26f55a59dc65ff77cd1c4b37991e26497fc68049
git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/patch/?id=e4d4d456436bfb2fe412ee2cd489f7658449b098
launchpad.net/bugs/cve/CVE-2021-29154
nvd.nist.gov/vuln/detail/CVE-2021-29154
security-tracker.debian.org/tracker/CVE-2021-29154
ubuntu.com/security/notices/USN-4912-1
ubuntu.com/security/notices/USN-4916-1
ubuntu.com/security/notices/USN-4917-1
www.cve.org/CVERecord?id=CVE-2021-29154
www.openwall.com/lists/oss-security/2021/04/08/1
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
14.2%