CVE-2022-3534

Memory corruption via stale BTF name pointer

Published Oct 17, 2022 · Updated Jul 28, 2026

Use-after-free in Linux Kernel libbpf through 5.10.162, 5.15.85, 6.0.15, and 6.1.1 allows attackers to access freed memory during BTF dumping. The btf_dump_name_dups function stores a BTF string address as a name_map hash key; a later realloc frees the backing string while the key remains in use. The published assessment requires low privileges and adjacent access, and public evidence establishes an invalid read but not code execution or kernel compromise.

CVSS severity5.1
Medium
EPSS probability0.91%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux Kernel libbpf through 5.10.162, 5.15.85, 6.0.15, and 6.1.1 allows attackers to access freed memory during BTF dumping. The btf_dump_name_dups function stores a BTF string address as a name_map hash key; a later realloc frees the backing string while the key remains in use. The published assessment requires low privileges and adjacent access, and public evidence establishes an invalid read but not code execution or kernel compromise.

The record

CVE
CVE-2022-3534
Published
Oct 17, 2022
Updated
Jul 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416, CWE-119
Attack vector
adjacent
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 17, 2022CVE publishedPublication date reported by the CVE source.
  2. Jul 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.10.162
  2. Affected versionversion=5.15.0
  3. Affected versionversion=5.15.1
  4. Affected versionversion=5.15.10
  5. Affected versionversion=5.15.11
  6. Affected versionversion=5.15.12
  7. Affected versionversion=5.15.13
  8. Affected versionversion=5.15.14
  9. Affected versionversion=5.15.15
  10. Affected versionversion=5.15.16
  11. Affected versionversion=5.15.17
  12. Affected versionversion=5.15.18
  13. Affected versionversion=5.15.19
  14. Affected versionversion=5.15.2
  15. Affected versionversion=5.15.20
  16. Affected versionversion=5.15.21
  17. Affected versionversion=5.15.22
  18. Affected versionversion=5.15.23
  19. Affected versionversion=5.15.24
  20. Affected versionversion=5.15.25
  21. Affected versionversion=5.15.26
  22. Affected versionversion=5.15.27
  23. Affected versionversion=5.15.28
  24. Affected versionversion=5.15.29
  25. Affected versionversion=5.15.3
  26. Affected versionversion=5.15.30
  27. Affected versionversion=5.15.31
  28. Affected versionversion=5.15.32
  29. Affected versionversion=5.15.33
  30. Affected versionversion=5.15.34
  31. Affected versionversion=5.15.35
  32. Affected versionversion=5.15.36
  33. Affected versionversion=5.15.37
  34. Affected versionversion=5.15.38
  35. Affected versionversion=5.15.39
  36. Affected versionversion=5.15.4
  37. Affected versionversion=5.15.40
  38. Affected versionversion=5.15.41
  39. Affected versionversion=5.15.42
  40. Affected versionversion=5.15.43
  41. Affected versionversion=5.15.44
  42. Affected versionversion=5.15.45
  43. Affected versionversion=5.15.46
  44. Affected versionversion=5.15.47
  45. Affected versionversion=5.15.48
  46. Affected versionversion=5.15.49
  47. Affected versionversion=5.15.5
  48. Affected versionversion=5.15.50
  49. Affected versionversion=5.15.51
  50. Affected versionversion=5.15.52
  51. Affected versionversion=5.15.53
  52. Affected versionversion=5.15.54
  53. Affected versionversion=5.15.55
  54. Affected versionversion=5.15.56
  55. Affected versionversion=5.15.57
  56. Affected versionversion=5.15.58
  57. Affected versionversion=5.15.59
  58. Affected versionversion=5.15.6
  59. Affected versionversion=5.15.60
  60. Affected versionversion=5.15.61
  61. Affected versionversion=5.15.62
  62. Affected versionversion=5.15.63
  63. Affected versionversion=5.15.64
  64. Affected versionversion=5.15.65
  65. Affected versionversion=5.15.66
  66. Affected versionversion=5.15.67
  67. Affected versionversion=5.15.68
  68. Affected versionversion=5.15.69
  69. Affected versionversion=5.15.7
  70. Affected versionversion=5.15.70
  71. Affected versionversion=5.15.71
  72. Affected versionversion=5.15.72
  73. Affected versionversion=5.15.73
  74. Affected versionversion=5.15.74
  75. Affected versionversion=5.15.75
  76. Affected versionversion=5.15.76
  77. Affected versionversion=5.15.77
  78. Affected versionversion=5.15.78
  79. Affected versionversion=5.15.79
  80. Affected versionversion=5.15.8
  81. Affected versionversion=5.15.80
  82. Affected versionversion=5.15.81
  83. Affected versionversion=5.15.82
  84. Affected versionversion=5.15.83
  85. Affected versionversion=5.15.84
  86. Affected versionversion=5.15.85
  87. Affected versionversion=5.15.9
  88. Affected versionversion=6.0.0
  89. Affected versionversion=6.0.1
  90. Affected versionversion=6.0.10
  91. Affected versionversion=6.0.11
  92. Affected versionversion=6.0.12
  93. Affected versionversion=6.0.13
  94. Affected versionversion=6.0.14
  95. Affected versionversion=6.0.15
  96. Affected versionversion=6.0.2
  97. Affected versionversion=6.0.3
  98. Affected versionversion=6.0.4
  99. Affected versionversion=6.0.5
  100. Affected versionversion=6.0.6
  101. Affected versionversion=6.0.7
  102. Affected versionversion=6.0.8
  103. Affected versionversion=6.0.9
  104. Affected versionversion=6.1.0
  105. Affected versionversion=6.1.1

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.10.162; version=5.15.0; version=5.15.1; version=5.15.10; version=5.15.11; version=5.15.12; version=5.15.13; version=5.15.14; version=5.15.15; version=5.15.16; version=5.15.17; version=5.15.18; version=5.15.19; version=5.15.2; version=5.15.20; version=5.15.21; version=5.15.22; version=5.15.23; version=5.15.24; version=5.15.25; version=5.15.26; version=5.15.27; version=5.15.28; version=5.15.29; version=5.15.3; version=5.15.30; version=5.15.31; version=5.15.32; version=5.15.33; version=5.15.34; version=5.15.35; version=5.15.36; version=5.15.37; version=5.15.38; version=5.15.39; version=5.15.4; version=5.15.40; version=5.15.41; version=5.15.42; version=5.15.43; version=5.15.44; version=5.15.45; version=5.15.46; version=5.15.47; version=5.15.48; version=5.15.49; version=5.15.5; version=5.15.50; version=5.15.51; version=5.15.52; version=5.15.53; version=5.15.54; version=5.15.55; version=5.15.56; version=5.15.57; version=5.15.58; version=5.15.59; version=5.15.6; version=5.15.60; version=5.15.61; version=5.15.62; version=5.15.63; version=5.15.64; version=5.15.65; version=5.15.66; version=5.15.67; version=5.15.68; version=5.15.69; version=5.15.7; version=5.15.70; version=5.15.71; version=5.15.72; version=5.15.73; version=5.15.74; version=5.15.75; version=5.15.76; version=5.15.77; version=5.15.78; version=5.15.79; version=5.15.8; version=5.15.80; version=5.15.81; version=5.15.82; version=5.15.83; version=5.15.84; version=5.15.85; version=5.15.9; version=6.0.0; version=6.0.1; version=6.0.10; version=6.0.11; version=6.0.12; version=6.0.13; version=6.0.14; version=6.0.15; version=6.0.2; version=6.0.3; version=6.0.4; version=6.0.5; version=6.0.6; version=6.0.7; version=6.0.8; version=6.0.9; version=6.1.0; version=6.1.1

Published CVSS scores

5.1VulDB CNACVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
5.5VulDB CNACVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
4.9VulDB CNAAV:A/AC:M/Au:S/C:P/I:P/A:P
8.0NIST NVDCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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