Linux/Unix 主機上安裝了一個或多個受到弱點影響的套件，且廠商未提供可用的修補程式。

  - 在 rpm 中發現堆積型緩衝區溢位缺陷。RPMTAG_FILESIGNATURES在特製的未簽名 RPM 套件的主標頭中，使用錯誤的標頭類型宣告，導致 hex2binv（） 配置一個位元組緩衝區，然後寫入標籤的攻擊者控制、攻擊者選擇長度的十六進位解碼內容，超過該配置的末尾。這可以透過不受信任套件上的 rpm2cpio、rpm2archive 和 rpm -qlvp 來實現。（CVE-2026-103242）

請注意，Nessus 的判定取決於廠商所報告的套件是否存在。

Linux/Unix 主机中安装的一个或多个程序包受到一个漏洞影响，而供应商没有提供补丁程序。

  - 在 rpm 中发现一个基于堆的缓冲区溢出缺陷。构造的未签名 RPM 程序包的主标头中的 RPMTAG_FILESIGNATURES 使用错误的标头类型声明，导致 hex2binv（） 分配一个字节缓冲区，然后在超过该分配末尾后的位置写入攻击者所选长度的由攻击者控制的十六进制解码标签内容。可通过不受信任程序包上的 rpm2cpio、rpm2archive 和 rpm -qlvp 达到此目的。（CVE-2026-103242）

请注意，Nessus 依赖供应商报告的程序包是否存在进行判断。

Linux/Unix ホストには、ベンダーが提供するパッチが利用できない脆弱性の影響を受ける複数のパッケージがインストールされています。

  - rpm にヒープベースのバッファオーバーフローの欠陥が見つかりました。細工された署名なし RPM パッケージのメインヘッダーの RPMTAG_FILESIGNATURES が間違ったヘッダータイプで宣言されている場合、hex2binv() は 1 バイトのバッファを割り当ててから、攻撃者が選択した長さのタグの攻撃者が制御する、16 進でデコードされたコンテンツをその割り当ての終端を超えて書き込みます。これは、信頼できないパッケージのrpm2cpio、rpm2archive、rpm -qlvpを介してアクセスできます。(CVE-2026-103242)

Nessus は、ベンダーから報告されたパッケージの存在に依存していることに注意してください。

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - A heap-based buffer overflow flaw was found in rpm. RPMTAG_FILESIGNATURES in a crafted, unsigned RPM     package's main header is declared with the wrong header type, causing hex2binv() to allocate a one-byte     buffer and then write the tag's attacker-controlled, hex-decoded content  of attacker-chosen length     past the end of that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an     untrusted package. (CVE-2026-103242)

Note that Nessus relies on the presence of the package as reported by the vendor.

The AlmaLinux 9.2 host has packages installed that are affected by multiple vulnerabilities as referenced in the TuxCare ALMALINUX9.2:CLSA-2026:1794008871 advisory.

  - A heap-based buffer overflow flaw was found in rpm. RPMTAG_FILESIGNATURES in a crafted, unsigned RPM     package's main header is declared with the wrong header type, causing hex2binv() to allocate a one-byte     buffer and then write the tag's attacker-controlled, hex-decoded content  of attacker-chosen length     past the end of that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an     untrusted package. (CVE-2026-103242)

  - A vulnerability was found in RPM's rpmbuild tarball processing. When processing a crafted source archive,     the getTarSpec() function in tools/rpmbuild.cc passes an attacker-controlled tar archive member name to     rpmExpand() as part of a %{basename:...} macro expression. A specially crafted .spec member name can     therefore inject RPM macros, including Lua expressions, resulting in arbitrary code execution with the     privileges of the user running rpmbuild. This can be exploited when a victim or automated build system     processes an attacker-controlled source tarball using rpmbuild tarball mode (such as -ts, -ta, or -tb).
    (CVE-2026-78367)

  - A flaw was found in rpm. An attacker can supply a crafted manifest file that, when processed by a user or     automation using `rpm -q -p` or similar manifest-processing flows, leads to arbitrary code execution. This     occurs because manifest entries are unexpectedly macro-expanded before being opened, allowing embedded     shell commands to run with the privileges of the `rpm` process. Successful exploitation can lead to a full     compromise of confidentiality, integrity, and availability for the affected account. (CVE-2026-95519)

  - A heap-based buffer overflow flaw was found in rpm. Parsing a symlink entry in an untrusted RPM package     whose declared RPMTAG_LONGFILESIZES value is 0xFFFFFFFFFFFFFFFF causes an integer overflow in     iterReadArchiveNext() that shrinks a buffer allocation to one byte, after which the payload's     independently-controlled cpio filesize field is used to write attacker-controlled data past the end of     that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an untrusted package.
    (CVE-2026-95520)

  - A flaw was found in rpm. An attacker can exploit a command injection vulnerability by influencing the path     or filename of a tarball processed by `rpmbuild -t*` to include shell metacharacters. This is particularly     relevant in automated build or continuous integration (CI) workflows that ingest externally supplied     artifact names. Successful exploitation allows for arbitrary command execution with the privileges of the     build user, which could lead to information disclosure or disruption of the build environment.
    (CVE-2026-84837)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of rpm installed on the remote host is prior to 4.14.3-4. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2MOCK2-2026-003 advisory.

    A heap-based buffer overflow flaw was found in rpm. RPMTAG_FILESIGNATURES in a crafted, unsigned RPM     package's main header is declared with the wrong header type, causing hex2binv() to allocate a one-byte     buffer and then write the tag's attacker-controlled, hex-decoded content -- of attacker-chosen length --     past the end of that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an     untrusted package. (CVE-2026-103242)

    A flaw was found in rpm. An attacker can exploit a command injection vulnerability by influencing the path     or filename of a tarball processed by `rpmbuild -t*` to include shell metacharacters. This is particularly     relevant in automated build or continuous integration (CI) workflows that ingest externally supplied     artifact names. Successful exploitation allows for arbitrary command execution with the privileges of the     build user, which could lead to information disclosure or disruption of the build environment.
    (CVE-2026-84837)

    A flaw was found in rpm. An attacker can supply a crafted manifest file that, when processed by a user or     automation using `rpm -q -p` or similar manifest-processing flows, leads to arbitrary code execution. This     occurs because manifest entries are unexpectedly macro-expanded before being opened, allowing embedded     shell commands to run with the privileges of the `rpm` process. Successful exploitation can lead to a full     compromise of confidentiality, integrity, and availability for the affected account. (CVE-2026-95519)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-3398 advisory.

    A heap-based buffer overflow flaw was found in rpm. RPMTAG_FILESIGNATURES in a crafted, unsigned RPM     package's main header is declared with the wrong header type, causing hex2binv() to allocate a one-byte     buffer and then write the tag's attacker-controlled, hex-decoded content -- of attacker-chosen length --     past the end of that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an     untrusted package. (CVE-2026-103242)

    A flaw was found in rpm. An attacker can exploit a command injection vulnerability by influencing the path     or filename of a tarball processed by `rpmbuild -t*` to include shell metacharacters. This is particularly     relevant in automated build or continuous integration (CI) workflows that ingest externally supplied     artifact names. Successful exploitation allows for arbitrary command execution with the privileges of the     build user, which could lead to information disclosure or disruption of the build environment.
    (CVE-2026-84837)

    A flaw was found in rpm. An attacker can supply a crafted manifest file that, when processed by a user or     automation using `rpm -q -p` or similar manifest-processing flows, leads to arbitrary code execution. This     occurs because manifest entries are unexpectedly macro-expanded before being opened, allowing embedded     shell commands to run with the privileges of the `rpm` process. Successful exploitation can lead to a full     compromise of confidentiality, integrity, and availability for the affected account. (CVE-2026-95519)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	名前	製品	ファミリー	公開日	更新日	深刻度
351458	Linux Distros 未修補弱點：CVE-2026-103242	Nessus	Misc.	2026/9/30	2026/11/5	high
351458	Linux Distros 未修补的漏洞：CVE-2026-103242	Nessus	Misc.	2026/9/30	2026/11/5	high
351458	Linux Distros のパッチ未適用の脆弱性: CVE-2026-103242	Nessus	Misc.	2026/9/30	2026/11/5	high
351458	Linux Distros Unpatched Vulnerability : CVE-2026-103242	Nessus	Misc.	2026/9/30	2026/11/5	high
377128	AlmaLinux 9.2 [TuxCare] Security Update: python3-rpm / rpm / rpm-apidocs / rpm-build / rpm-build-libs / etc Multiple Vulnerabilities (ALMALINUX9.2:CLSA-2026:1794008871)	Nessus	Alma Linux Local Security Checks	2026/11/6	2026/11/6	high
377894	Amazon Linux 2 : rpm (ALASMOCK2-2026-003)	Nessus	Amazon Linux Local Security Checks	2026/11/9	2026/11/9	high
377934	Amazon Linux 2023 : python3-rpm, rpm, rpm-apidocs (ALAS2023-2026-3398)	Nessus	Amazon Linux Local Security Checks	2026/11/9	2026/11/9	high

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