CVE-2026-45870
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…
Does this matter?
Lower severity and a low EPSS score (0.16%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.16% probability · 6th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-401
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/3b56eb90feb8a3709417f5624f3871847d42bcb1Patch
- https://git.kernel.org/stable/c/3e6397b056335cc56ef0e9da36c95946a19f5118Patch
- https://git.kernel.org/stable/c/64303b92d94c0c7845a273acd8d84b796d6f1db7Patch
- https://git.kernel.org/stable/c/b4af3806846778799cd4ab0766dc18341e777264Patch
- https://git.kernel.org/stable/c/c81431b1b9fbd21e9a5a9211b5517b7295d18e6aPatch
- https://git.kernel.org/stable/c/caf7eff432e91a9eba1c79fa545c2f54be15d62bPatch
- https://git.kernel.org/stable/c/d79b9097a6a2b91471b40755f1225364be5d85ffPatch
- https://git.kernel.org/stable/c/df10f23defff22c8d55fe6db74f6e4ce927145bfPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.