CVSS
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Описание
Оригинално описание
In the Linux kernel, the following vulnerability has been resolved: net: gue: reject invalid REMCSUM offsets The REMCSUM option carries an absolute checksum start and checksum field offset. gue_remcsum() passes them to skb_remcsum_process(), whose partial path stores offset - start in the u16 skb->csum_offset variable. If offset is less than start, this underflows. A forwarded packet can retain CHECKSUM_PARTIAL and reach a NETIF_F_HW_CSUM driver which trusts the metadata, leading skb_copy_and_csum_dev() to write two bytes about 64 KiB beyond the destination buffer. Reject reversed tuples in validate_gue_flags(), after the existing length validation, so all GUE parsers enforce the ordering in one place.
Засегнати продукти
- Linux Linux: fe881ef11cf0220f118816181930494d484c4883 преди 4b9bc21b2396c396d88dd909caaf73d5be6ff593; fe881ef11cf0220f118816181930494d484c4883 преди 43efb1f997e976f386aa89716f55870cd2cff9ad; fe881ef11cf0220f118816181930494d484c4883 преди 1eeec0c51fd5598da44080ed96bbd9880021c28b; fe881ef11cf0220f118816181930494d484c4883 преди 1d664be4ca49d1696e85239236f4988dfc4653c3; fe881ef11cf0220f118816181930494d484c4883 преди 97f907203321eee2cc9132d5c9eb47698fb41d35; fe881ef11cf0220f118816181930494d484c4883 преди 40aeafbcbc7bc4018e8f74bbbb4d29ed8846f57f; fe881ef11cf0220f118816181930494d484c4883 преди c20f755338ca234e523dfc943719f194dfc1f903; fe881ef11cf0220f118816181930494d484c4883 преди 2566866fc30965d915d0b52b5c3323b362619f0e
- Linux Linux: 4.0; преди 4.0; 5.10.271 до 5.10.*; 5.15.222 до 5.15.*; 6.1.189 до 6.1.*; 6.6.158 до 6.6.*; 6.12.112 до 6.12.*; 6.18.55 до 6.18.*; 7.2.9 до 7.2.*; 7.3 до *
История
- 18 октомври 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-98621
- https://nvd.nist.gov/vuln/detail/CVE-2026-98621
- https://git.kernel.org/stable/c/4b9bc21b2396c396d88dd909caaf73d5be6ff593
- https://git.kernel.org/stable/c/43efb1f997e976f386aa89716f55870cd2cff9ad
- https://git.kernel.org/stable/c/1eeec0c51fd5598da44080ed96bbd9880021c28b
- https://git.kernel.org/stable/c/1d664be4ca49d1696e85239236f4988dfc4653c3
- https://git.kernel.org/stable/c/97f907203321eee2cc9132d5c9eb47698fb41d35
- https://git.kernel.org/stable/c/40aeafbcbc7bc4018e8f74bbbb4d29ed8846f57f
- https://git.kernel.org/stable/c/c20f755338ca234e523dfc943719f194dfc1f903
- https://git.kernel.org/stable/c/2566866fc30965d915d0b52b5c3323b362619f0e