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CVE-2026-63385

Medium priority
Fixed

Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent has two HTTP parsing weaknesses in http.c. evhttp_decode_uri_internal decodes percent-encoded %00 bytes into literal NUL characters, which can...

1 affected package

libevent

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libevent Fixed Fixed Fixed Fixed Fixed
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CVE-2026-63384

Medium priority
Fixed

Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent has an incorrect integer conversion in event_tagging.c when evtag_unmarshal_header uses evtag_decode_int to decode an attacker-controlled uint32...

1 affected package

libevent

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libevent Fixed Fixed Fixed Fixed Fixed
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CVE-2026-63383

Medium priority
Fixed

Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent can read beyond a contiguous evbuffer region in event_tagging.c when decode_tag_internal requests at most five bytes from evbuffer_pullup but...

1 affected package

libevent

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libevent Fixed Fixed Fixed Fixed Fixed
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CVE-2026-63382

Medium priority
Fixed

Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, the libevent evhttp parser in http.c inconsistently handles duplicate Transfer-Encoding headers, comma-separated Transfer-Encoding values, and bare line...

1 affected package

libevent

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libevent Fixed Fixed Fixed Fixed Fixed
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CVE-2026-63381

Medium priority
Fixed

Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent has a use-after-free in buffer.c when evbuffer_add_buffer_reference processes an output buffer whose out_total_len is zero....

1 affected package

libevent

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libevent Fixed Fixed Fixed Fixed Fixed
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CVE-2026-63495

Medium priority
Needs evaluation

Libevent is an event notification library. From 2.2.0-alpha-dev until 2.2.2-alpha, the libevent WebSocket server in ws.c accumulates fragmented frames in evws->incomplete_frames without enforcing a total message-size limit. An...

1 affected package

libevent

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libevent Needs evaluation Needs evaluation Needs evaluation Needs evaluation Needs evaluation
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CVE-2026-63388

Medium priority
Needs evaluation

Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent has a heap out-of-bounds write in bufferevent_sock.c when bufferevent_socket_set_conn_address_ copies a kernel-supplied AF_UNIX peer address into...

1 affected package

libevent

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libevent Needs evaluation Needs evaluation Needs evaluation Needs evaluation Needs evaluation
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CVE-2026-63387

Medium priority
Needs evaluation

Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent has an off-by-one stack buffer overflow in evdns.c when dnsname_to_labels formats a name-bearing DNS record at the end of the 64 KB stack buffer...

1 affected package

libevent

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libevent Needs evaluation Needs evaluation Needs evaluation Needs evaluation Needs evaluation
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CVE-2026-63380

Medium priority
Needs evaluation

Libevent is an event notification library. Prior to 2.2.2-alpha, libevent can dereference invalid list pointers in ws.c when evws_new_session enters its error path after evhttp_start_ws_ succeeds but bufferevent_enable_locking_...

1 affected package

libevent

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libevent Needs evaluation Needs evaluation Needs evaluation Needs evaluation Needs evaluation
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CVE-2026-63379

Medium priority
Needs evaluation

Libevent is an event notification library. Prior to 2.1.13 and 2.2.2-alpha, libevent processes chunked HTTP trailers in http.c through evhttp_read_trailer and merges them into request headers. The fix introduces...

1 affected package

libevent

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libevent Needs evaluation Needs evaluation Needs evaluation Needs evaluation Needs evaluation
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