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CVE-2025-71113: Linux, грешка в паметта

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Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: crypto: af_alg - zero initialize memory allocated via sock_kmalloc Several crypto user API contexts and requests allocated with sock_kmalloc() were left uninitialized, relying on callers to set fields explicitly. This resulted in the use of uninitialized data in certain error paths or when new fields are added in the future. The ACVP patches also contain two user-space interface files: algif_kpp.c and algif_akcipher.c. These too rely on proper initialization of their context structures. A particular issue has been observed with the newly added 'inflight' variable introduced in af_alg_ctx by commit: 67b164a871af ("crypto: af_alg - Disallow multiple in-flight AIO requests") Because the context is not memset to zero after allocation, the inflight variable has contained garbage values. As a result, af_alg_alloc_areq() has incorrectly returned -EBUSY randomly when the garbage value was interpreted as true: https://github.com/gregkh/linux/blame/master/crypto/af_alg.c#L1209 The check directly tests ctx->inflight without explicitly comparing against true/false. Since inflight is only ever set to true or false later, an uninitialized value has triggered -EBUSY failures. Zero-initializing memory allocated with sock_kmalloc() ensures inflight and other fields start in a known state, removing random issues caused by uninitialized data.

Засегнати продукти

  • Linux Linux: fe869cdb89c95d060c77eea20204d6c91f233b53 преди e125c8e346e4eb7b3e854c862fcb4392bc13ddba; fe869cdb89c95d060c77eea20204d6c91f233b53 преди 543bf004e4eafbb302b1e6c78570d425d2ca13a0; fe869cdb89c95d060c77eea20204d6c91f233b53 преди f81244fd6b14fecfa93b66b6bb1d59f96554e550; fe869cdb89c95d060c77eea20204d6c91f233b53 преди 84238876e3b3b262cf62d5f4d1338e983fb27010; fe869cdb89c95d060c77eea20204d6c91f233b53 преди 5a4b65523608974a81edbe386f8a667a3e10c726; fe869cdb89c95d060c77eea20204d6c91f233b53 преди 51a5ab36084f3251ef87eda3e6a6236f6488925e; fe869cdb89c95d060c77eea20204d6c91f233b53 преди 6f6e309328d53a10c0fe1f77dec2db73373179b6
  • Linux Linux: 2.6.38; преди 2.6.38; 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
  • Siemens: още 3 продукта, добавени от Siemens

    SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP, SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

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История

  • 14 януари 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2025-71113: Linux, грешка в паметта | freedomonline.bg