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CVE-2026-107167— M17n-lib: heap use-after-free write in re_init_ic()

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 m17n-lib 中发现了一个漏洞。用户提供精心构造的文本输入时，可以在输入法状态转换期间触发堆上的释放后使用（use-after-free）条件。在特定条件下，该库会释放一个内部输入上下文对象，但随后尝试写入该已释放的内存。此问题可能导致依赖该库的应用程序崩溃，从而引发拒绝服务（DoS）攻击，或者在特定情况下允许执行任意代码。

CVSS 6.2 · Medium
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I. Basic Information for CVE-2026-107167

Vulnerability Information
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Vulnerability Title
M17n-lib: heap use-after-free write in re_init_ic()
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in m17n-lib. A user providing specially crafted text input can trigger a heap use-after-free condition during input-method state transitions. Under specific conditions, the library frees an internal input context object but subsequently attempts to write to that freed memory. This issue can cause applications relying on the library to crash, leading to a Denial of Service (DoS), or potentially allow arbitrary code execution.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
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

II. Public POCs for CVE-2026-107167

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III. Intelligence Information for CVE-2026-107167

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Other References for CVE-2026-107167 (2)

Same Patch Batch · Red Hat · 2026-10-07 · 13 CVEs total

CVE-2026-106471 8.1 HIGH Candlepin: candlepin: broken object-level authorization via verifyauthorizationfilter mult
CVE-2026-107121 6.5 MEDIUM Keycloak-services: keycloak-services: smtp starttls plaintext credential and message downg
CVE-2026-103869 6.5 MEDIUM Pulp-ansible: bearer tokens are reused across remotes in a worker
CVE-2026-103868 6.5 MEDIUM Pulp-container: registry credentials are reused across remotes in a worker
CVE-2026-107174 6.4 MEDIUM Source-to-image: source-to-image: security boundary bypass via absolute symbolic link extr
CVE-2026-106064 6.3 MEDIUM Gimp: gimp: heap buffer overflow in gif export on oversized image dimensions
CVE-2026-107169 6.2 MEDIUM M17n-lib: null-pointer write in read_mtext_element() on malformed utf-8
CVE-2026-107168 6.2 MEDIUM M17n-lib: parser infinite loop on malformed utf-8 in count_utf_8_chars()
CVE-2026-107151 5.9 MEDIUM Rubygem-smart_proxy_dynflow: task update and done callbacks accept unauthenticated request
CVE-2026-106061 5.5 MEDIUM Gimp: gimp: heap buffer over-read in x cursor (xmc) thumbnail loader on crafted file
CVE-2026-103870 5.0 MEDIUM Pulp-rpm: distribution tree publish creates directories from .treeinfo ids
CVE-2026-107170 2.9 LOW M17n-lib: null dereference in minput_open_im() after failed m17n_init()

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-416

V. Comments for CVE-2026-107167

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