Ubuntu.comUB:CVE-2021-45402CVE-2021-45402
5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
2.1 Low
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:L/Au:N/C:P/I:N/A:N
0.0004 Low
EPSS
Percentile
5.3%
The check_alu_op() function in kernel/bpf/verifier.c in the Linux kernel
through v5.16-rc5 did not properly update bounds while handling the mov32
instruction, which allows local users to obtain potentially sensitive
address information, aka a “pointer leak.”
Notes
| Author | Note |
|---|---|
| sbeattie | add kernel tests in b1a7288dedc6caf9023f2676b4f5ed34cf0d4029 |
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 21.10 | noarch | linux-azure | < 5.13.0-1021.24 | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-azure-5.13 | < 5.13.0-1021.24~20.04.1 | UNKNOWN |
| ubuntu | 22.04 | noarch | linux-azure-fde | < any | UNKNOWN |
| ubuntu | 21.10 | noarch | linux-gcp | < 5.13.0-1021.25 | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-gcp-5.13 | < 5.13.0-1021.25~20.04.1 | UNKNOWN |
| ubuntu | 22.04 | noarch | linux-gkeop | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-hwe-5.13 | < 5.13.0-37.42~20.04.1 | UNKNOWN |
| ubuntu | 21.10 | noarch | linux-kvm | < 5.13.0-1018.19 | UNKNOWN |
| ubuntu | 20.04 | noarch | linux-oem-5.14 | < 5.14.0-1022.24 | UNKNOWN |
| ubuntu | 21.10 | noarch | linux-oracle | < 5.13.0-1023.28 | UNKNOWN |
References
git.kernel.org/linus/3cf2b61eb06765e27fec6799292d9fb46d0b7e60
git.kernel.org/linus/b1a7288dedc6caf9023f2676b4f5ed34cf0d4029
git.kernel.org/linus/e572ff80f05c33cd0cb4860f864f5c9c044280b6
git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=3cf2b61eb06765e27fec6799292d9fb46d0b7e60
git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=b1a7288dedc6caf9023f2676b4f5ed34cf0d4029
git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=e572ff80f05c33cd0cb4860f864f5c9c044280b6
launchpad.net/bugs/cve/CVE-2021-45402
nvd.nist.gov/vuln/detail/CVE-2021-45402
security-tracker.debian.org/tracker/CVE-2021-45402
ubuntu.com/security/notices/USN-5337-1
ubuntu.com/security/notices/USN-5368-1
www.cve.org/CVERecord?id=CVE-2021-45402
Related
5.5 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
2.1 Low
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:L/Au:N/C:P/I:N/A:N
0.0004 Low
EPSS
Percentile
5.3%