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.
Описание
Оригинално описание
In the Linux kernel, the following vulnerability has been resolved: fuse: reject oversized dirents in page cache fuse_add_dirent_to_cache() computes a serialized dirent size from the server-controlled namelen field and copies the dirent into a single page-cache page. The existing logic only checks whether the dirent fits in the remaining space of the current page and advances to a fresh page if not. It never checks whether the dirent itself exceeds PAGE_SIZE. As a result, a malicious FUSE server can return a dirent with namelen=4095, producing a serialized record size of 4120 bytes. On 4 KiB page systems this causes memcpy() to overflow the cache page by 24 bytes into the following kernel page. Reject dirents that cannot fit in a single page before copying them into the readdir cache.
Засегнати продукти
- Linux Linux: 27992ef80770d61a57f6c3a551735b08cefdffa3 преди 7de93abfaae1b2dc94da8a07a36421bd073f1d8f; 27992ef80770d61a57f6c3a551735b08cefdffa3 преди 474ce83c96a55f2eeb14dee2be375eeadfdacdf5; 27992ef80770d61a57f6c3a551735b08cefdffa3 преди 51a8de6c50bf947c8f534cd73da4c8f0a13e7bed
- Linux Linux: 6.15; преди 6.15; 6.18.25 до 6.18.*; 7.0.2 до 7.0.*; 7.1 до *
- Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem: преди *
История
- 1 май 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-31694
- https://nvd.nist.gov/vuln/detail/CVE-2026-31694
- https://git.kernel.org/stable/c/7de93abfaae1b2dc94da8a07a36421bd073f1d8f
- https://git.kernel.org/stable/c/474ce83c96a55f2eeb14dee2be375eeadfdacdf5
- https://git.kernel.org/stable/c/51a8de6c50bf947c8f534cd73da4c8f0a13e7bed
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html