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CVE-2026-84838— Rpm: command injection in rpmuncompress via unescaped filenames passed to popen()

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 10
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 中发现了一个缺陷。这一命令注入漏洞允许本地攻击者执行任意命令。该漏洞发生在 处理一个经过特殊构造的归档文件时，其文件名中包含 Shell 元字符，而这些字符在传入 Shell 命令字符串前未被正确转义。成功利用该漏洞需要用户交互，即用户或自动化工作流对恶意文件调用 ，从而对调用用户可访问数据的机密性、完整性和可用性造成严重影响。

CVSS 7.8 · High

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2026-84838

Vulnerability Information
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Vulnerability Title
Rpm: command injection in rpmuncompress via unescaped filenames passed to popen()
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in rpmuncompress. This command injection vulnerability allows a local attacker to execute arbitrary commands. This occurs when rpmuncompress processes a specially crafted archive filename containing shell metacharacters, which are not properly escaped before being passed to shell command strings. Successful exploitation requires user interaction, where a user or automated workflow invokes rpmuncompress on the malicious file, leading to high impact on the confidentiality, integrity, and availability of data accessible to the invoking user.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Enterprise Linux 10 - cpe:/o:redhat:enterprise_linux:10
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7
Red Hat Red Hat Enterprise Linux 8 - cpe:/o:redhat:enterprise_linux:8
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9
Red Hat Red Hat Hardened Images - cpe:/a:redhat:hummingbird:1

II. Public POCs for CVE-2026-84838

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III. Intelligence Information for CVE-2026-84838

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Vendor Advisories for CVE-2026-84838 (1)

Other References for CVE-2026-84838 (1)

Same Patch Batch · Red Hat · 2026-09-02 · 7 CVEs total

CVE-2026-78408 7.9 HIGH Util-linux: util-linux: nsenter --join-cgroup leaks root cgroup migration authority
CVE-2026-84837 7.8 HIGH Rpm: command injection in `rpmbuild -t*` (`gettarspec`) via unescaped tarball path
CVE-2026-78410 7.8 HIGH Util-linux: util-linux: restricted bind mounts do not pin the source, allowing x-mount.own
CVE-2026-78409 7.0 HIGH Util-linux: util-linux: x-mount.subdir detached-tree resolution can escape via intermediat
CVE-2026-82968 6.4 MEDIUM Keycloak-services: keycloak-services: cross-session email verification proof not bound to
CVE-2026-53683 4.3 MEDIUM Freeipa: idm: idm/freeipa web ui - client-side open redirect in reset_password.html

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-78

V. Comments for CVE-2026-84838

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