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CVE-2026-93207: Linux

9.8

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се по мрежата, без особени условия, без вход и без действие от потребителя.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: SUNRPC: Zero rpc_gss_wire_cred at svcauth_gss_decode_credbody() entry svcauth_gss_decode_credbody() writes the caller's rpc_gss_wire_cred field by field and assigns gc_ctx.len only on the success tail. The caller storage is svcdata->clcred, which lives in the per-svc_rqst gss_svc_data and is reused across requests. Early decode failures leave partially decoded state mixed with residue from the prior request. The trailing body_len tightness check is the sharpest case: xdr_stream_decode_opaque_inline() has already written gc_ctx.data with a borrowed inline pointer into the current request's XDR pages, but gc_ctx.len retains its prior value. Once the request pages are released the pooled clcred carries a dangling pointer paired with a stale length. Zero the caller's rpc_gss_wire_cred at function entry so that every early-return path leaves a deterministic all-zero cred. On the trailing tightness-check path, gc_ctx.len is now zero instead of stale, which neuters length-driven consumers such as gss_svc_searchbyctx() that would otherwise walk the dangling data pointer.

    Засегнати продукти

    • Linux Linux: b0bc53470d1af01f62a0fe2d405cf56477804863 преди 56b29d62017c7dd1718d060dd5b3a2ce61095d0c; b0bc53470d1af01f62a0fe2d405cf56477804863 преди 0e18641708eaa8bc3c1ff338cd844aeadbd52bac; b0bc53470d1af01f62a0fe2d405cf56477804863 преди e0778464049b0238f2915a40007a4154f86cf351; b0bc53470d1af01f62a0fe2d405cf56477804863 преди 0fa8a8acae57e6373962741d5b06d13f44aba6a9; b0bc53470d1af01f62a0fe2d405cf56477804863 преди 11539e8fcce0b0af062ae5fecf7b3676c2f7aeed
    • Linux Linux: 6.3; преди 6.3; 6.6.157 до 6.6.*; 6.12.109 до 6.12.*; 6.18.50 до 6.18.*; 7.2.4 до 7.2.*; от 7.3 нататък

    История

    • 24 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-93207: Linux | freedomonline.bg