SUNRPC: auth_gss: fix memory leaks in XDR decoding error paths
Summary
| CVE | CVE-2026-45870 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-05-27 14:17:00 UTC |
| Updated | 2026-05-27 14:48:31 UTC |
| 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. |
Risk And Classification
EPSS: 0.000240000 probability, percentile 0.073320000 (date 2026-06-01)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 1d658336b05f8697d6445834f8867f8ad5e4f735 c81431b1b9fbd21e9a5a9211b5517b7295d18e6a git | Not specified |
| CNA | Linux | Linux | affected 1d658336b05f8697d6445834f8867f8ad5e4f735 caf7eff432e91a9eba1c79fa545c2f54be15d62b git | Not specified |
| CNA | Linux | Linux | affected 1d658336b05f8697d6445834f8867f8ad5e4f735 64303b92d94c0c7845a273acd8d84b796d6f1db7 git | Not specified |
| CNA | Linux | Linux | affected 1d658336b05f8697d6445834f8867f8ad5e4f735 df10f23defff22c8d55fe6db74f6e4ce927145bf git | Not specified |
| CNA | Linux | Linux | affected 1d658336b05f8697d6445834f8867f8ad5e4f735 b4af3806846778799cd4ab0766dc18341e777264 git | Not specified |
| CNA | Linux | Linux | affected 1d658336b05f8697d6445834f8867f8ad5e4f735 d79b9097a6a2b91471b40755f1225364be5d85ff git | Not specified |
| CNA | Linux | Linux | affected 1d658336b05f8697d6445834f8867f8ad5e4f735 3b56eb90feb8a3709417f5624f3871847d42bcb1 git | Not specified |
| CNA | Linux | Linux | affected 1d658336b05f8697d6445834f8867f8ad5e4f735 3e6397b056335cc56ef0e9da36c95946a19f5118 git | Not specified |
| CNA | Linux | Linux | affected 3.10 | Not specified |
| CNA | Linux | Linux | unaffected 3.10 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.252 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.202 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.165 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.128 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.75 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.14 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.19.4 6.19.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.0 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/64303b92d94c0c7845a273acd8d84b796d6f1db7 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/c81431b1b9fbd21e9a5a9211b5517b7295d18e6a | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/3b56eb90feb8a3709417f5624f3871847d42bcb1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/3e6397b056335cc56ef0e9da36c95946a19f5118 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/caf7eff432e91a9eba1c79fa545c2f54be15d62b | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/b4af3806846778799cd4ab0766dc18341e777264 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/d79b9097a6a2b91471b40755f1225364be5d85ff | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/df10f23defff22c8d55fe6db74f6e4ce927145bf | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.