The rpcap client code that processes a RPCAP_MSG_PACKET message received from the server incorrectly validates its headers. A malicious server can send a crafted message and cause the client to treat up to 20 bytes of the client process memory beyond the end of the buffer as if it was a part of the captured packet.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - The rpcap client code that processes a RPCAP_MSG_PACKET message received from the server incorrectly
    validates its headers. A malicious server can send a crafted message and cause the client to treat up to
    20 bytes of the client process memory beyond the end of the buffer as if it was a part of the captured
    packet. (CVE-2026-18238)

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21940-1 advisory.

    - CVE-2026-0799: the BPF interpreter does not validate values in BPF instructions that load/store a value     from/to a       scratch memory register and allows for OOB access (bsc#1279782).
    - CVE-2026-6244: libpcap BPF interpreter for the 'div #k' and 'mod #k' ALU instructions does not check     whether the       immediate value is zero. In particular uncommon use cases a crafted filter program can cause a division     by zero       (bsc#1279595).
    - CVE-2026-6554: libpcap BPF interpreter treats the offset in the 'ja L' BPF instruction implements     looping via backward       jumps, but it does not limit the number of loop iterations. Can cause infinite loop (bsc#1279584).
    - CVE-2026-18238: `rpcap` client code that processes a `RPCAP_MSG_PACKET` message received from the server     incorrectly       validates its headers and allows for an OOB access (bsc#1279783).
    - CVE-2026-18313: `rpcapd` allocates up to 65536 bytes per each `RPCAP_MSG_UPDATEFILTER_REQ` or     `RPCAP_MSG_STARTCAP_REQ`       message received from the client and never frees the memory (bsc#1279784).
    - CVE-2026-31911: libpcap BPF interpreter calls abort() if it encounters a BPF instruction that has an     invalid opcode.
      In particular uncommon use cases a crafted filter program can terminate the OS process (bsc#1279588).
    - CVE-2026-31912: libpcap BPF interpreter detects neither reaching the end of the filter program buffer     due to lack of a       return instruction nor executing a jump instruction with an offset that translates to a pointer outside     of the buff       (bsc#1279593).

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

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

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-4401b94ad0 advisory.

    New version 10.7.1     Fix for CVE-2026-0799, CVE-2026-6244, CVE-2026-6554, CVE-2026-18238, CVE-2026-18313, CVE-2026-31911,     CVE-2026-31912

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

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

The remote SUSE Linux SLES12 / SLES_SAP12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:4239-1 advisory.

    - CVE-2026-0799: the BPF interpreter does not validate values in BPF instructions that load/store a value     from/to a       scratch memory register and allows for OOB access (bsc#1279782).
    - CVE-2026-6244: libpcap BPF interpreter for the 'div #k' and 'mod #k' ALU instructions does not check     whether the       immediate value is zero. In particular uncommon use cases a crafted filter program can cause a division     by zero       (bsc#1279595).
    - CVE-2026-6554: libpcap BPF interpreter treats the offset in the 'ja L' BPF instruction implements     looping via backward       jumps, but it does not limit the number of loop iterations. Can cause infinite loop (bsc#1279584).
    - CVE-2026-18238: `rpcap` client code that processes a `RPCAP_MSG_PACKET` message received from the server     incorrectly       validates its headers and allows for an OOB access (bsc#1279783).
    - CVE-2026-31911: libpcap BPF interpreter calls abort() if it encounters a BPF instruction that has an     invalid opcode.
      In particular uncommon use cases a crafted filter program can terminate the OS process (bsc#1279588).
    - CVE-2026-31912: libpcap BPF interpreter detects neither reaching the end of the filter program buffer     due to lack of a       return instruction nor executing a jump instruction with an offset that translates to a pointer outside     of the buff       (bsc#1279593).

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

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

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:4188-1 advisory.

    - CVE-2026-0799: the BPF interpreter does not validate values in BPF instructions that load/store a value     from/to a       scratch memory register and allows for OOB access (bsc#1279782).
    - CVE-2026-6244: libpcap BPF interpreter for the 'div #k' and 'mod #k' ALU instructions does not check     whether the       immediate value is zero. In particular uncommon use cases a crafted filter program can cause a division     by zero       (bsc#1279595).
    - CVE-2026-6554: libpcap BPF interpreter treats the offset in the 'ja L' BPF instruction implements     looping via backward       jumps, but it does not limit the number of loop iterations. Can cause infinite loop (bsc#1279584).
    - CVE-2026-18238: `rpcap` client code that processes a `RPCAP_MSG_PACKET` message received from the server     incorrectly       validates its headers and allows for an OOB access (bsc#1279783).
    - CVE-2026-18313: `rpcapd` allocates up to 65536 bytes per each `RPCAP_MSG_UPDATEFILTER_REQ` or     `RPCAP_MSG_STARTCAP_REQ`       message received from the client and never frees the memory (bsc#1279784).
    - CVE-2026-31911: libpcap BPF interpreter calls abort() if it encounters a BPF instruction that has an     invalid opcode.
      In particular uncommon use cases a crafted filter program can terminate the OS process (bsc#1279588).
    - CVE-2026-31912: libpcap BPF interpreter detects neither reaching the end of the filter program buffer     due to lack of a       return instruction nor executing a jump instruction with an offset that translates to a pointer outside     of the buff       (bsc#1279593).

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

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

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:4195-1 advisory.

    - CVE-2026-0799: the BPF interpreter does not validate values in BPF instructions that load/store a value     from/to a       scratch memory register and allows for OOB access (bsc#1279782).
    - CVE-2026-6244: libpcap BPF interpreter for the 'div #k' and 'mod #k' ALU instructions does not check     whether the       immediate value is zero. In particular uncommon use cases a crafted filter program can cause a division     by zero       (bsc#1279595).
    - CVE-2026-6554: libpcap BPF interpreter treats the offset in the 'ja L' BPF instruction implements     looping via backward       jumps, but it does not limit the number of loop iterations. Can cause infinite loop (bsc#1279584).
    - CVE-2026-18238: `rpcap` client code that processes a `RPCAP_MSG_PACKET` message received from the server     incorrectly       validates its headers and allows for an OOB access (bsc#1279783).
    - CVE-2026-18313: `rpcapd` allocates up to 65536 bytes per each `RPCAP_MSG_UPDATEFILTER_REQ` or     `RPCAP_MSG_STARTCAP_REQ`       message received from the client and never frees the memory (bsc#1279784).
    - CVE-2026-31911: libpcap BPF interpreter calls abort() if it encounters a BPF instruction that has an     invalid opcode.
      In particular uncommon use cases a crafted filter program can terminate the OS process (bsc#1279588).
    - CVE-2026-31912: libpcap BPF interpreter detects neither reaching the end of the filter program buffer     due to lack of a       return instruction nor executing a jump instruction with an offset that translates to a pointer outside     of the buff       (bsc#1279593).

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

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

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:4194-1 advisory.

    - CVE-2026-0799: the BPF interpreter does not validate values in BPF instructions that load/store a value     from/to a       scratch memory register and allows for OOB access (bsc#1279782).
    - CVE-2026-6244: libpcap BPF interpreter for the 'div #k' and 'mod #k' ALU instructions does not check     whether the       immediate value is zero. In particular uncommon use cases a crafted filter program can cause a division     by zero       (bsc#1279595).
    - CVE-2026-6554: libpcap BPF interpreter treats the offset in the 'ja L' BPF instruction implements     looping via backward       jumps, but it does not limit the number of loop iterations. Can cause infinite loop (bsc#1279584).
    - CVE-2026-18238: `rpcap` client code that processes a `RPCAP_MSG_PACKET` message received from the server     incorrectly       validates its headers and allows for an OOB access (bsc#1279783).
    - CVE-2026-18313: `rpcapd` allocates up to 65536 bytes per each `RPCAP_MSG_UPDATEFILTER_REQ` or     `RPCAP_MSG_STARTCAP_REQ`       message received from the client and never frees the memory (bsc#1279784).
    - CVE-2026-31911: libpcap BPF interpreter calls abort() if it encounters a BPF instruction that has an     invalid opcode.
      In particular uncommon use cases a crafted filter program can terminate the OS process (bsc#1279588).
    - CVE-2026-31912: libpcap BPF interpreter detects neither reaching the end of the filter program buffer     due to lack of a       return instruction nor executing a jump instruction with an offset that translates to a pointer outside     of the buff       (bsc#1279593).

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

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

The remote Fedora 45 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-c3fb234b87 advisory.

    New version 10.7.1     Fix for CVE-2026-0799, CVE-2026-6244, CVE-2026-6554, CVE-2026-18238, CVE-2026-18313, CVE-2026-31911,     CVE-2026-31912

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

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 libpcap installed on the remote host is prior to 1.10.7. It is, therefore, affected by multiple vulnerabilities as referenced in the SSA:2026-249-01 advisory.

    New libpcap packages are available for Slackware 15.0 and -current to fix security issues.

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

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

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

  - The rpcap client code that processes a RPCAP_MSG_PACKET message received from the server incorrectly     validates its headers. A malicious server can send a crafted message and cause the client to treat up to     20 bytes of the client process memory beyond the end of the buffer as if it was a part of the captured     packet. (CVE-2026-18238)

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

ID	Name	Product	Family	Type	Severity
461157	Echo: libpcap: security update to 1.10.5-2+e2	Tenable Cloud Security	Echo Local Security Checks	Local	medium
461157	Echo: libpcap: security update to 1.10.5-2+e2	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	medium
350769	openSUSE 16 Security Update : libpcap (openSUSE-SU-2026:21940-1)	Nessus	SuSE Local Security Checks	Local	high
350755	Fedora 43 : libpcap (2026-4401b94ad0)	Nessus	Fedora Local Security Checks	Local	high
347896	SUSE SLES12 Security Update : libpcap (SUSE-SU-2026:4239-1)	Nessus	SuSE Local Security Checks	Local	high
346218	SUSE SLED15 / SLES15 Security Update : libpcap (SUSE-SU-2026:4188-1)	Nessus	SuSE Local Security Checks	Local	high
346215	SUSE SLES15 Security Update : libpcap (SUSE-SU-2026:4195-1)	Nessus	SuSE Local Security Checks	Local	high
346207	SUSE SLES15 Security Update : libpcap (SUSE-SU-2026:4194-1)	Nessus	SuSE Local Security Checks	Local	high
345457	Fedora 45 : libpcap (2026-c3fb234b87)	Nessus	Fedora Local Security Checks	Local	high
343410	Slackware Linux 15.0 / current libpcap Multiple Vulnerabilities (SSA:2026-249-01)	Nessus	Slackware Local Security Checks	Local	high
343116	Linux Distros Unpatched Vulnerability : CVE-2026-18238	Nessus	Misc.	Local	medium

Detections

Analytics

CVE-2026-18238

medium

Tenable Plugins

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medium