Threats Tagged 'ubuntu-cve-2026-43333'
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Threats Tagged 'ubuntu-cve-2026-43333'
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In the Linux kernel, the following vulnerability has been resolved: bpf: reject direct access to nullable PTR_TO_BUF pointers check_mem_access() matches PTR_TO_BUF via base_type() which strips PTR_MAYBE_NULL, allowing direct dereference without a null check. Map iterator ctx->key and ctx->value are PTR_TO_BUF | PTR_MAYBE_NULL. On stop callbacks these are NULL, causing a kernel NULL dereference. Add a type_may_be_null() guard to the PTR_TO_BUF branch, matching the existing PTR_TO_BTF_ID pattern. Join the discussion | GCVE Database | 05/08/2026, 14:16:00 UTC Added: 07/17/2026, 10:24:49 UTC |
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