CVE-2025-68771: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix kernel BUG in ocfs2_find_victim_chain syzbot reported a kernel BUG in ocfs2_find_victim_chain() because the `cl_next_free_rec` field of the allocation chain list (next free slot in the chain list) is 0, triggring the BUG_ON(!cl->cl_next_free_rec) condition in ocfs2_find_victim_chain() and panicking the kernel. To fix this, an if condition is introduced in ocfs2_claim_suballoc_bits(), just before calling ocfs2_find_victim_chain(), the code block in it being executed when either of the following conditions is true: 1. `cl_next_free_rec` is equal to 0, indicating that there are no free chains in the allocation chain list 2. `cl_next_free_rec` is greater than `cl_count` (the total number of chains in the allocation chain list) Either of them being true is indicative of the fact that there are no chains left for usage. This is addressed using ocfs2_error(), which prints the error log for debugging purposes, rather than panicking the kernel.

Засегнати продукти

• Linux Linux: ccd979bdbce9fba8412beb3f1de68a9d0171b12c преди 1f77e5cd563e6387fdf3bb714fcda36cd88ac5e7; ccd979bdbce9fba8412beb3f1de68a9d0171b12c преди d0fd1f732ea8063cecd07a3879b7d815c7ee71ed; ccd979bdbce9fba8412beb3f1de68a9d0171b12c преди b08a33d5f80efe6979a6e8f905c1a898910c21dd; ccd979bdbce9fba8412beb3f1de68a9d0171b12c преди 96f1b074c98c20f55a3b23d2ab44d9fb0f619869; ccd979bdbce9fba8412beb3f1de68a9d0171b12c преди e24aedae71652d4119049f1fbef6532ccbe3966d; ccd979bdbce9fba8412beb3f1de68a9d0171b12c преди 7acc0390e0dd7474c4451d05465a677d55ad4268; ccd979bdbce9fba8412beb3f1de68a9d0171b12c преди 039bef30e320827bac8990c9f29d2a68cd8adb5f
• Linux Linux: 2.6.16; преди 2.6.16; 5.10.248 до 5.10.*; 5.15.198 до 5.15.*; 6.1.160 до 6.1.*; 6.6.120 до 6.6.*; 6.12.64 до 6.12.*; 6.18.3 до 6.18.*; от 6.19 нататък

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99268
• CVE-2026-99266
• CVE-2026-99267

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2025-68771
• https://nvd.nist.gov/vuln/detail/CVE-2025-68771
• https://git.kernel.org/stable/c/1f77e5cd563e6387fdf3bb714fcda36cd88ac5e7
• https://git.kernel.org/stable/c/d0fd1f732ea8063cecd07a3879b7d815c7ee71ed
• https://git.kernel.org/stable/c/b08a33d5f80efe6979a6e8f905c1a898910c21dd
• https://git.kernel.org/stable/c/96f1b074c98c20f55a3b23d2ab44d9fb0f619869
• https://git.kernel.org/stable/c/e24aedae71652d4119049f1fbef6532ccbe3966d
• https://git.kernel.org/stable/c/7acc0390e0dd7474c4451d05465a677d55ad4268
• https://git.kernel.org/stable/c/039bef30e320827bac8990c9f29d2a68cd8adb5f