What is CVE-2026-68462?
This vulnerability in the Linux kernel allowed the BPF verifier to incorrectly accept constant negative offsets for buffer pointer accesses. Affecting `PTR_TO_TP_BUFFER` and `PTR_TO_BUF` types, it could lead to out-of-bounds memory access. The kernel must be updated to reject such negative offsets.
Azərbaycanca: Linux kernel-də aşkar edilmiş bu boşluq BPF verifikatorunda bufer göstəriciləri üçün mənfi sabit ofsetləri səhvən qəbul edirdi. Bu zəiflik `PTR_TO_TP_BUFFER` və `PTR_TO_BUF` tiplərinə təsir edərək potensial olaraq bufer sərhədlərini aşmağa imkan verir. Problemi aradan qaldırmaq üçün kernel yenilənməlidir.
Related CVEs
link basis: same weakness class CWE-125
FAQ2
In which Linux kernel component was CVE-2026-68462 discovered, and what is its root cause?
This vulnerability was discovered in the Linux kernel's BPF verifier. The root cause is that the verifier incorrectly accepted constant negative offsets for buffer pointer accesses of `PTR_TO_TP_BUFFER` and `PTR_TO_BUF` types.
What security risk could CVE-2026-68462 pose?
By allowing constant negative offsets for buffer pointer accesses, this vulnerability could potentially lead to out-of-bounds memory access.
See also6
This explainer is AI-written from source data — skopnix's own reporting on this CVE; CVSS scores, vendors and versions are never invented. See NVD for the official record.