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CVE-2026-80823: Linux

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CVSS

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: nfc: st21nfca: validate ATR_REQ length against the received frame st21nfca_tm_recv_atr_req() checks that the received ATR_REQ frame is at least ST21NFCA_ATR_REQ_MIN_SIZE and that the self-declared atr_req->length is at least sizeof(struct st21nfca_atr_req), but never checks that atr_req->length does not exceed the actual received length (skb->len). st21nfca_tm_send_atr_res() then trusts the declared length: gb_len = atr_req->length - sizeof(struct st21nfca_atr_req); ... memcpy(atr_res->gbi, atr_req->gbi, gb_len); so an RF peer that sends a short frame but sets atr_req->length larger than the frame makes gb_len exceed the general bytes actually present, and the memcpy reads out of bounds past the received skb. Those bytes are placed in the ATR_RES and sent back to the peer (kernel-memory disclosure to a proximity attacker); a larger declared length is an out-of-bounds read (DoS). Reject frames whose declared length exceeds the received length. The adjacent nfc_tm_activated() path in the same function already derives its general-bytes length from skb->len rather than the declared field. Found by 0sec (https://0sec.ai) using automated source analysis; the missing bound is evident from source. Compile-tested.

    Засегнати продукти

    • Linux Linux: 1892bf844ea0261736bd5e75546fc996e9daeedf преди 785df00bb3ae3206674a43284eb06dac575b5c64; 1892bf844ea0261736bd5e75546fc996e9daeedf преди 2c1ad291f4cdc357f9527b688c6fda9c6ffa7890; 1892bf844ea0261736bd5e75546fc996e9daeedf преди dd26d30f40c43ad9cfe2f25c6ea0ead1dd51d5aa; 1892bf844ea0261736bd5e75546fc996e9daeedf преди 9635507fe82949e429b3cd938876a9917125b151; 1892bf844ea0261736bd5e75546fc996e9daeedf преди 0f344944c506b4f02d2b098489f7268b438c369e; 1892bf844ea0261736bd5e75546fc996e9daeedf преди bfcca5f42c9aa4eadef1e5fe7bb23783d7fcc96d; 1892bf844ea0261736bd5e75546fc996e9daeedf преди 304f5b414f4051d324b8c4a3ab0e79f7dc7e150e; 1892bf844ea0261736bd5e75546fc996e9daeedf преди f33cecf69095c43be88567fef92b180b858f7369; 1892bf844ea0261736bd5e75546fc996e9daeedf преди 5cdcca5d62a66eda6b774110a44cba67bc1a8d1d
    • Linux Linux: 3.17; преди 3.17; 5.10.267 до 5.10.*; 5.15.218 до 5.15.*; 6.1.185 до 6.1.*; 6.6.154 до 6.6.*; 6.12.106 до 6.12.*; 6.18.47 до 6.18.*; 7.1.11 до 7.1.*; 7.2.1 до 7.2.*; от 7.3 нататък

    История

    • 4 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-80823: Linux | freedomonline.bg