CVE-2026-6554

libpcap BPF interpreter treats the offset in the 'ja L' BPF instruction as a signed integer to implement looping via backward jumps, but it does not limit the number of loop iterations. A crafted filter program or the 'protochain' primitive used on a crafted network packet can cause the interpreter to loop infinitely.

libpcap BPF interpreter treats the offset in the 'ja L' BPF instruction as a signed integer to implement looping via backward jumps, but it does not limit the number of loop iterations. A crafted filter program or the 'protochain' primitive used on a crafted network packet can cause the interpreter to loop infinitely.

This is the official web site of tcpdump, a powerful command-line packet analyzer; and libpcap, a portable C/C++ library for network traffic capture.

Security Fix(es):

In BPF instructions that load/store a value from/to a scratch memory register the register index is an unsigned 32-bit integer and must not exceed 15, but libpcap BPF interpreter does not validate the value. In particular uncommon use cases a crafted filter program can cause the interpreter to try reading and writing the OS process memory in the 16GiB starting at the current stack frame on 64-bit architectures and in the entire address space on 32-bit architectures.(CVE-2026-0799)

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)

rpcapd can allocate up to 65536 bytes per each RPCAP_MSG_UPDATEFILTER_REQ or RPCAP_MSG_STARTCAP_REQ message received from the client, but it never frees the memory, so it leaks memory even under normal use. A malicious client can cause the server to leak memory substantially faster.(CVE-2026-18313)

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.(CVE-2026-31911)

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 buffer. In particular uncommon use cases a crafted filter program can cause the interpreter to try reading the OS process memory in the 32GiB around the buffer on 64-bit architectures and in the entire address space on 32-bit architectures.(CVE-2026-31912)

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.(CVE-2026-6244)

libpcap BPF interpreter treats the offset in the 'ja L' BPF instruction as a signed integer to implement looping via backward jumps, but it does not limit the number of loop iterations. In particular uncommon use cases a crafted filter program can cause the interpreter to loop infinitely.(CVE-2026-6554)

This is the official web site of tcpdump, a powerful command-line packet analyzer; and libpcap, a portable C/C++ library for network traffic capture.

Security Fix(es):

In BPF instructions that load/store a value from/to a scratch memory register the register index is an unsigned 32-bit integer and must not exceed 15, but libpcap BPF interpreter does not validate the value. In particular uncommon use cases a crafted filter program can cause the interpreter to try reading and writing the OS process memory in the 16GiB starting at the current stack frame on 64-bit architectures and in the entire address space on 32-bit architectures.(CVE-2026-0799)

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)

rpcapd can allocate up to 65536 bytes per each RPCAP_MSG_UPDATEFILTER_REQ or RPCAP_MSG_STARTCAP_REQ message received from the client, but it never frees the memory, so it leaks memory even under normal use. A malicious client can cause the server to leak memory substantially faster.(CVE-2026-18313)

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.(CVE-2026-31911)

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 buffer. In particular uncommon use cases a crafted filter program can cause the interpreter to try reading the OS process memory in the 32GiB around the buffer on 64-bit architectures and in the entire address space on 32-bit architectures.(CVE-2026-31912)

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.(CVE-2026-6244)

libpcap BPF interpreter treats the offset in the 'ja L' BPF instruction as a signed integer to implement looping via backward jumps, but it does not limit the number of loop iterations. In particular uncommon use cases a crafted filter program can cause the interpreter to loop infinitely.(CVE-2026-6554)

This is the official web site of tcpdump, a powerful command-line packet analyzer; and libpcap, a portable C/C++ library for network traffic capture.

Security Fix(es):

In BPF instructions that load/store a value from/to a scratch memory register the register index is an unsigned 32-bit integer and must not exceed 15, but libpcap BPF interpreter does not validate the value. In particular uncommon use cases a crafted filter program can cause the interpreter to try reading and writing the OS process memory in the 16GiB starting at the current stack frame on 64-bit architectures and in the entire address space on 32-bit architectures.(CVE-2026-0799)

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)

rpcapd can allocate up to 65536 bytes per each RPCAP_MSG_UPDATEFILTER_REQ or RPCAP_MSG_STARTCAP_REQ message received from the client, but it never frees the memory, so it leaks memory even under normal use. A malicious client can cause the server to leak memory substantially faster.(CVE-2026-18313)

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.(CVE-2026-31911)

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 buffer. In particular uncommon use cases a crafted filter program can cause the interpreter to try reading the OS process memory in the 32GiB around the buffer on 64-bit architectures and in the entire address space on 32-bit architectures.(CVE-2026-31912)

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.(CVE-2026-6244)

libpcap BPF interpreter treats the offset in the 'ja L' BPF instruction as a signed integer to implement looping via backward jumps, but it does not limit the number of loop iterations. In particular uncommon use cases a crafted filter program can cause the interpreter to loop infinitely.(CVE-2026-6554)

This is the official web site of tcpdump, a powerful command-line packet analyzer; and libpcap, a portable C/C++ library for network traffic capture.

Security Fix(es):

In BPF instructions that load/store a value from/to a scratch memory register the register index is an unsigned 32-bit integer and must not exceed 15, but libpcap BPF interpreter does not validate the value. In particular uncommon use cases a crafted filter program can cause the interpreter to try reading and writing the OS process memory in the 16GiB starting at the current stack frame on 64-bit architectures and in the entire address space on 32-bit architectures.(CVE-2026-0799)

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)

rpcapd can allocate up to 65536 bytes per each RPCAP_MSG_UPDATEFILTER_REQ or RPCAP_MSG_STARTCAP_REQ message received from the client, but it never frees the memory, so it leaks memory even under normal use. A malicious client can cause the server to leak memory substantially faster.(CVE-2026-18313)

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.(CVE-2026-31911)

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 buffer. In particular uncommon use cases a crafted filter program can cause the interpreter to try reading the OS process memory in the 32GiB around the buffer on 64-bit architectures and in the entire address space on 32-bit architectures.(CVE-2026-31912)

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.(CVE-2026-6244)

libpcap BPF interpreter treats the offset in the 'ja L' BPF instruction as a signed integer to implement looping via backward jumps, but it does not limit the number of loop iterations. In particular uncommon use cases a crafted filter program can cause the interpreter to loop infinitely.(CVE-2026-6554)

This is the official web site of tcpdump, a powerful command-line packet analyzer; and libpcap, a portable C/C++ library for network traffic capture.

Security Fix(es):

In BPF instructions that load/store a value from/to a scratch memory register the register index is an unsigned 32-bit integer and must not exceed 15, but libpcap BPF interpreter does not validate the value. In particular uncommon use cases a crafted filter program can cause the interpreter to try reading and writing the OS process memory in the 16GiB starting at the current stack frame on 64-bit architectures and in the entire address space on 32-bit architectures.(CVE-2026-0799)

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)

rpcapd can allocate up to 65536 bytes per each RPCAP_MSG_UPDATEFILTER_REQ or RPCAP_MSG_STARTCAP_REQ message received from the client, but it never frees the memory, so it leaks memory even under normal use. A malicious client can cause the server to leak memory substantially faster.(CVE-2026-18313)

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.(CVE-2026-31911)

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 buffer. In particular uncommon use cases a crafted filter program can cause the interpreter to try reading the OS process memory in the 32GiB around the buffer on 64-bit architectures and in the entire address space on 32-bit architectures.(CVE-2026-31912)

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.(CVE-2026-6244)

libpcap BPF interpreter treats the offset in the 'ja L' BPF instruction as a signed integer to implement looping via backward jumps, but it does not limit the number of loop iterations. In particular uncommon use cases a crafted filter program can cause the interpreter to loop infinitely.(CVE-2026-6554)

libpcap BPF interpreter treats the offset in the 'ja L' BPF instruction as a signed integer to implement looping via backward jumps, but it does not limit the number of loop iterations. A crafted filter program or the 'protochain' primitive used on a crafted network packet can cause the interpreter to loop infinitely.

libpcap BPF interpreter treats the offset in the 'ja L' BPF instruction as a signed integer to implement looping via backward jumps, but it does not limit the number of loop iterations. A crafted filter program or the 'protochain' primitive used on a crafted network packet can cause the interpreter to loop infinitely.

libpcap BPF interpreter treats the offset in the 'ja L' BPF instruction as a signed integer to implement looping via backward jumps, but it does not limit the number of loop iterations. In particular uncommon use cases a crafted filter program can cause the interpreter to loop infinitely.

OOBR and OOBW in libpcap before 1.10.7. (CVE-2026-0799) abort() in libpcap before 1.10.7 on an invalid BPF opcode. (CVE-2026-31911) OOBR in libpcap before 1.10.7. (CVE-2026-31912) Division by zero in libpcap before 1.10.7. (CVE-2026-6244) Infinte loop in libpcap before 1.10.7. (CVE-2026-6554) rpcapd memory leak in libpcap before 1.10.7. (CVE-2026-18313) OOBR in rpcap client in libpcap before 1.10.7. (CVE-2026-18238)

These are all security issues fixed in the libpcap-devel-1.10.7-1.1 package on the GA media of openSUSE Tumbleweed.

This update for libpcap fixes the following issues:

• 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).

This update for libpcap fixes the following issues:

• 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).

This update for libpcap fixes the following issues:

• 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).

This update for libpcap fixes the following issues:

• 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).

This update for libpcap fixes the following issues:

• 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).

This update for libpcap fixes the following issues:

• 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).

This update for libpcap fixes the following issues:

• 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).

This update for libpcap fixes the following issues:

• 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).

This update for libpcap fixes the following issues:

• 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).