CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.
- Експлоатация: няма данни за експлоатация
- Атаката не може да се автоматизира
Описание
Оригинално описание
In the Linux kernel, the following vulnerability has been resolved: seg6: validate SRH length before reading fixed fields seg6_validate_srh() reads fixed SRH fields such as srh->type and srh->hdrlen before checking that the supplied length covers the fixed struct ipv6_sr_hdr fields. The BPF SEG6 encap path reaches this with a BPF program-supplied pointer and length: bpf_lwt_push_encap() and the SEG6 local BPF END_B6 and END_B6_ENCAP actions call bpf_push_seg6_encap(), which forwards the length to seg6_validate_srh() with no minimum-size guard. A 2-byte SEG6 encap header can therefore make the validator read srh->type at offset 2 beyond the caller-supplied buffer. Reject lengths shorter than the fixed SRH at the top of seg6_validate_srh(), before any field is read. This fixes the BPF helper path and keeps the common validator robust.
Засегнати продукти
- Linux Linux: fe94cc290f535709d3c5ebd1e472dfd0aec7ee79 преди 715eb12e453df752f1b4baaf972c3acff0ab9402; fe94cc290f535709d3c5ebd1e472dfd0aec7ee79 преди 7247d05c987c3eec4bb7c2306dbd77ecdf3b7c73; fe94cc290f535709d3c5ebd1e472dfd0aec7ee79 преди 071f1a38d7ddbadee29c09b9e3ee0ff3a61e6a0e; fe94cc290f535709d3c5ebd1e472dfd0aec7ee79 преди 804bb969f194c93497ba632b98343794c6367fdc; fe94cc290f535709d3c5ebd1e472dfd0aec7ee79 преди 0fc7069d39239978130c37ebceaec85c8948d3f1; fe94cc290f535709d3c5ebd1e472dfd0aec7ee79 преди 8dba7a94a269b88e500aafc25ad567ef6a423698; fe94cc290f535709d3c5ebd1e472dfd0aec7ee79 преди c9961336aa5ff83092f23e33ee86666a9dbd1b2a; fe94cc290f535709d3c5ebd1e472dfd0aec7ee79 преди a75d99f46bf21b45965ce39c5cfb3b8bb5ffb1aa
- Linux Linux: 4.18; преди 4.18; 5.10.261 до 5.10.*; 5.15.212 до 5.15.*; 6.1.178 до 6.1.*; 6.6.145 до 6.6.*; 6.12.97 до 6.12.*; 6.18.40 до 6.18.*; 7.1.5 до 7.1.*; от 7.2 нататък
История
- 15 август 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-72400
- https://nvd.nist.gov/vuln/detail/CVE-2026-72400
- https://git.kernel.org/stable/c/715eb12e453df752f1b4baaf972c3acff0ab9402
- https://git.kernel.org/stable/c/7247d05c987c3eec4bb7c2306dbd77ecdf3b7c73
- https://git.kernel.org/stable/c/071f1a38d7ddbadee29c09b9e3ee0ff3a61e6a0e
- https://git.kernel.org/stable/c/804bb969f194c93497ba632b98343794c6367fdc
- https://git.kernel.org/stable/c/0fc7069d39239978130c37ebceaec85c8948d3f1
- https://git.kernel.org/stable/c/8dba7a94a269b88e500aafc25ad567ef6a423698
- https://git.kernel.org/stable/c/c9961336aa5ff83092f23e33ee86666a9dbd1b2a
- https://git.kernel.org/stable/c/a75d99f46bf21b45965ce39c5cfb3b8bb5ffb1aa