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CVE-2021-29154

Good to know:

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Date: April 7, 2021

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.

Language: C

Severity Score

Related Resources (16)

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W5YFGIIF24475A2LNW3UWHW2SNCS3G7M/
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-29154
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=26f55a59dc65ff77cd1c4b37991e26497fc68049
https://news.ycombinator.com/item?id=26757760
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/W5YFGIIF24475A2LNW3UWHW2SNCS3G7M/
http://packetstormsecurity.com/files/162434/Kernel-Live-Patch-Security-Notice-LSN-0076-1.html
https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e4d4d456436bfb2fe412ee2cd489f7658449b098
https://www.openwall.com/lists/oss-security/2021/04/08/1
https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html
https://access.redhat.com/security/cve/CVE-2021-29154
https://security.netapp.com/advisory/ntap-20210604-0006/
https://nvd.nist.gov/vuln/detail/CVE-2021-29154
https://www.oracle.com/security-alerts/cpujul2022.html
https://security-tracker.debian.org/tracker/CVE-2021-29154
https://www.mend.io/vulnerability-database/CVE-2021-29154

Severity Score

Weakness Type (CWE)

Improper Neutralization of Special Elements used in a Command ('Command Injection')

CWE-77

Top Fix

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Upgrade Version

Upgrade to version linux-libc-headers - 5.8;linux-libc-headers - 5.13;linux-yocto - 4.8.26+gitAUTOINC+1c60e003c7_27efc3ba68;linux-yocto - 4.10+gitAUTOINC+805ea440c7_b259a5d744

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CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): COMPLETE
Integrity (I): COMPLETE
Availability (A): COMPLETE
Additional information:

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