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CVE-2026-52986: Linux, грешка в паметта

9.8

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се по мрежата, без особени условия, без вход и без действие от потребителя.

CVE радар: още уязвимости от този вид

  • Експлоатация: няма данни за експлоатация
  • Атаката може да се автоматизира

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_sip: don't use simple_strtoul Replace unsafe port parsing in epaddr_len(), ct_sip_parse_header_uri(), and ct_sip_parse_request() with a new sip_parse_port() helper that validates each digit against the buffer limit, eliminating the use of simple_strtoul() which assumes NUL-terminated strings. The previous code dereferenced pointers without bounds checks after sip_parse_addr() and relied on simple_strtoul() on non-NUL-terminated skb data. A port that reaches the buffer limit without a trailing character is also rejected as malformed. Also get rid of all simple_strtoul() usage in conntrack, prefer a stricter version instead. There are intentional changes: - Bail out if number is > UINT_MAX and indicate a failure, same for too long sequences. While we do accept 05535 as port 5535, we will not accept e.g. 'sip:10.0.0.1:005060'. While its syntactically valid under RFC 3261, we should restrict this to not waste cycles when presented with malformed packets with 64k '0' characters. - Force base 10 in ct_sip_parse_numerical_param(). This is used to fetch 'expire=' and 'rports='; both are expected to use base-10. - In nf_nat_sip.c, only accept the parsed value if its within the 1k-64k range. - epaddr_len now returns 0 if the port is invalid, as it already does for invalid ip addresses. This is intentional. nf_conntrack_sip performs lots of guesswork to find the right parts of the message to parse. Being stricter could break existing setups. Connection tracking helpers are designed to allow traffic to pass, not to block it. Based on an earlier patch from Jenny Guanni Qu <[email protected]>.

Засегнати продукти

  • Linux Linux: 05e3ced297fe755093140e7487e292fb7603316e преди 8cd0358379570003659186706e077929d6930c40; 05e3ced297fe755093140e7487e292fb7603316e преди 9c6afcb1c3cbb2c0da65b8515ac14d7273872f84; 05e3ced297fe755093140e7487e292fb7603316e преди b3264c977e79d8a25778d4fd11520f00fea1329c; 05e3ced297fe755093140e7487e292fb7603316e преди ea2ecd29b8f4433e52607192ca91084f95787ca0; 05e3ced297fe755093140e7487e292fb7603316e преди 9f69c323ae0ab517e595c2cc74e0ae0d9d085611; 05e3ced297fe755093140e7487e292fb7603316e преди 7df9863bf538a626e8a684e59cb2c43eac0ef3c8; 05e3ced297fe755093140e7487e292fb7603316e преди 523762e3b6933fff81f01dfa3c60c0774044cdab; 05e3ced297fe755093140e7487e292fb7603316e преди 8cf6809cddcbe301aedfc6b51bcd4944d45795f6
  • Linux Linux: 2.6.26; преди 2.6.26; 5.10.258 до 5.10.*; 5.15.209 до 5.15.*; 6.1.175 до 6.1.*; 6.6.141 до 6.6.*; 6.12.91 до 6.12.*; 6.18.33 до 6.18.*; 7.0.10 до 7.0.*; от 7.1 нататък
  • Siemens: още 3 продукта, добавени от Siemens

    SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP, SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

Вид слабост

История

  • 24 юни 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-52986: Linux, грешка в паметта | freedomonline.bg