Home/CVE/BPF JIT compilers in the Linux kernel through 5.11.12 have incorrect computation of branch displacements, allowing them
CVE

CVE-2021-29154

BPF JIT compilers in the Linux kernel through 5.11.12 have incorrect computation of branch displacements, allowing them

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.

HIGH · CVSS 7.8 EPSS 0.00037
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
▤

Affected Products & Versions

19
linux kernel>= 3.0 and < 4.4.266
linux kernel>= 4.5 and < 4.9.266
linux kernel>= 4.10 and < 4.14.230
linux kernel>= 4.15 and < 4.19.186
linux kernel>= 4.20 and < 5.4.111
linux kernel>= 5.5 and < 5.10.29
linux kernel>= 5.11 and < 5.11.13
fedoraproject fedoraall versions
⚠

Public Exploits & PoCs

1
pocpacketstormsecurity.com · Kernel-Live-Patch-Security-Notice-LSN-0076-1.htmlpacketstormsecurity.com
▣

Scoring & Timeline

7.8
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD08 Apr 2021 · 09:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
⚑

Vendor Advisories

30
rhsaRHSA-2022:1988Low
rhsaRHSA-2022:1975Moderate
suse-csafSUSE-SU-2021:2577-1
suse-csafSUSE-SU-2021:14764-1
suse-csafopenSUSE-SU-2021:1975-1
🔗

References & Sources

9
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=26f55a59dc65ff77cd1c4b37991e26497fc68049
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e4d4d456436bfb2fe412ee2cd489f7658449b098
https://lists.debian.org/debian-lts-announce/2021/06/msg00019.htmlMailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2021/06/msg00020.htmlMailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W5YFGIIF24475A2LNW3UWHW2SNCS3G7M/
https://news.ycombinator.com/item?id=26757760Issue TrackingThird Party Advisory
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