In the Linux kernel, the following vulnerability has been resolved: SUNRPC: auth_gss: fix memory leaks in XDR decoding error paths The gssx_dec_ctx(), gssx_dec_status(), and gssx_dec_name() functions allocate memory via gssx_dec_buffer(), which calls kmemdup(). When a subsequent decode operation fails, these functions return immediately without freeing previously allocated buffers, causing memory leaks. The leak in gssx_dec_ctx() is particularly relevant because the caller (gssp_accept_sec_context_upcall) initializes several buffer length fields to non-zero values, resulting in memory allocation: struct gssx_ctx rctxh = { .exported_context_token.len = GSSX_max_output_handle_sz, .mech.len = GSS_OID_MAX_LEN, .src_name.display_name.len = GSSX_max_princ_sz, .targ_name.display_name.len = GSSX_max_princ_sz }; If, for example, gssx_dec_name() succeeds for src_name but fails for targ_name, the memory allocated for exported_context_token, mech, and src_name.display_name remains unreferenced and cannot be reclaimed. Add error handling with goto-based cleanup to free any previously allocated buffers before returning an error.

Metrics

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

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References
Link Providers
https://git.kernel.org/stable/c/3b56eb90feb8a3709417f5624f3871847d42bcb1 cve-icon cve-icon
https://git.kernel.org/stable/c/3e6397b056335cc56ef0e9da36c95946a19f5118 cve-icon cve-icon
https://git.kernel.org/stable/c/64303b92d94c0c7845a273acd8d84b796d6f1db7 cve-icon cve-icon
https://git.kernel.org/stable/c/b4af3806846778799cd4ab0766dc18341e777264 cve-icon cve-icon
https://git.kernel.org/stable/c/c81431b1b9fbd21e9a5a9211b5517b7295d18e6a cve-icon cve-icon
https://git.kernel.org/stable/c/caf7eff432e91a9eba1c79fa545c2f54be15d62b cve-icon cve-icon
https://git.kernel.org/stable/c/d79b9097a6a2b91471b40755f1225364be5d85ff cve-icon cve-icon
https://git.kernel.org/stable/c/df10f23defff22c8d55fe6db74f6e4ce927145bf cve-icon cve-icon
History

Wed, 27 May 2026 14:15:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: SUNRPC: auth_gss: fix memory leaks in XDR decoding error paths The gssx_dec_ctx(), gssx_dec_status(), and gssx_dec_name() functions allocate memory via gssx_dec_buffer(), which calls kmemdup(). When a subsequent decode operation fails, these functions return immediately without freeing previously allocated buffers, causing memory leaks. The leak in gssx_dec_ctx() is particularly relevant because the caller (gssp_accept_sec_context_upcall) initializes several buffer length fields to non-zero values, resulting in memory allocation: struct gssx_ctx rctxh = { .exported_context_token.len = GSSX_max_output_handle_sz, .mech.len = GSS_OID_MAX_LEN, .src_name.display_name.len = GSSX_max_princ_sz, .targ_name.display_name.len = GSSX_max_princ_sz }; If, for example, gssx_dec_name() succeeds for src_name but fails for targ_name, the memory allocated for exported_context_token, mech, and src_name.display_name remains unreferenced and cannot be reclaimed. Add error handling with goto-based cleanup to free any previously allocated buffers before returning an error.
Title SUNRPC: auth_gss: fix memory leaks in XDR decoding error paths
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-05-27T12:15:50.199Z

Reserved: 2026-05-13T15:03:33.081Z

Link: CVE-2026-45870

cve-icon Vulnrichment

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cve-icon NVD

Status : Awaiting Analysis

Published: 2026-05-27T14:17:00.420

Modified: 2026-05-27T14:48:31.480

Link: CVE-2026-45870

cve-icon Redhat

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cve-icon OpenCVE Enrichment

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