Summary
[2.1.13-1]
- Update to 2.1.13.
- The following CVEs are fixed:
- CVE-2026-63383
- CVE-2026-63384
- CVE-2026-63388
- CVE-2026-63387
- CVE-2026-63379
- CVE-2026-63381
- CVE-2026-63382
- CVE-2026-63385
Fixed packages 3
| Release | Package | Fixed in |
|---|---|---|
| Oracle Linux · 10 | libevent | 0:2.1.13-1.el10_2 |
| Oracle Linux · 10 | libevent-devel | 0:2.1.13-1.el10_2 |
| Oracle Linux · 10 | libevent-doc | 0:2.1.13-1.el10_2 |
Vulnerabilities 8
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Critical 9.2
libevent evhttp: Multiple HTTP Parser Bugs Enable Request Smuggling
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 feeds in chunked framing. evht…
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Critical 9.2
Libevent: HTTP header handling bugs create risk of access control bypass.
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 cause downstream C string opera…
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High 8.7
Libevent: decode_tag_internal() can lead to out-of-bounds read
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 iterates using the full logical …
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High 8.7
Libevent: `evtag_unmarshal_header()` decodes a wire `uint32` length into a signed `int` return value.
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 payload length and returns it…
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High 8.4
Libevent: Heap out-of-bounds write in bufferevent_socket_set_conn_address_ reachable via AF_UNIX accept
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 bufferevent_private.conn_add…
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High 7.0
Libevent: Off-by-one stack buffer overflow in dnsname_to_labels via crafted DNS server response
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 allocated by evdns_server_req…
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Medium 6.3
Libevent: HTTP Header smuggling
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 evhttp_parse_headers_impl_ and a temporary trai…
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Medium 5.8
Libevent: Dangling Pointer in `evbuffer_add_buffer_reference`
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. evbuffer_free_all_chains frees the initial empty c…