CVE-2025-71113

MEDIUM EPSS 2.4%
Published Jan 14, 20265mo ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Jan 14, 2026 5mo ago
Last Modified Jun 17, 2026 1w ago

Description

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.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
2.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-908

Affected Products 15

VendorProductVersionRange
linuxlinux_kernel*≥2.6.38.1  –  <5.10.248
linuxlinux_kernel*≥5.11  –  <5.15.198
linuxlinux_kernel*≥5.16  –  <6.1.160
linuxlinux_kernel*≥6.2  –  <6.6.120
linuxlinux_kernel*≥6.7  –  <6.12.64
linuxlinux_kernel*≥6.13  –  <6.18.3
linuxlinux_kernel2.6.38any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any
linuxlinux_kernel6.19any

References 7

  • git.kernel.org https://git.kernel.org/stable/c/51a5ab36084f3251ef87eda3e6a6236f6488925e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/543bf004e4eafbb302b1e6c78570d425d2ca13a0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5a4b65523608974a81edbe386f8a667a3e10c726
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6f6e309328d53a10c0fe1f77dec2db73373179b6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/84238876e3b3b262cf62d5f4d1338e983fb27010
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e125c8e346e4eb7b3e854c862fcb4392bc13ddba
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f81244fd6b14fecfa93b66b6bb1d59f96554e550
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/51a5ab36084f3251ef87eda3e6a6236f6488925e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/543bf004e4eafbb302b1e6c78570d425d2ca13a0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5a4b65523608974a81edbe386f8a667a3e10c726
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6f6e309328d53a10c0fe1f77dec2db73373179b6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/84238876e3b3b262cf62d5f4d1338e983fb27010
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e125c8e346e4eb7b3e854c862fcb4392bc13ddba
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f81244fd6b14fecfa93b66b6bb1d59f96554e550
    Patch