SUNRPC: auth_gss: fix memory leaks in XDR decoding error paths (Linux Linux)

CVE-2026-45870
MEDIUM 5.5

En bref

Source
NVD
EPSS
EPSS 0.16 % · centile 5 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Analyzed

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.

Faiblesses (CWE)

  • CWE-401 — Mémoire non libérée après sa durée de vie utile

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1MEDIUM 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HNVD · nvd@nist.gov (Primary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected 1d658336b05f8697d6445834f8867f8ad5e4f735 < c81431b1b9fbd21e9a5a9211b5517b7295d18e6a ; affected 1d658336b05f8697d6445834f8867f8ad5e4f735 < caf7eff432e91a9eba1c79fa545c2f54be15d62b ; affected 1d658336b05f8697d6445834f8867f8ad5e4f735 < 64303b92d94c0c7845a273acd8d84b796d6f1db7 ; affected 1d658336b05f8697d6445834f8867f8ad5e4f735 < df10f23defff22c8d55fe6db74f6e4ce927145bf ; affected 1d658336b05f8697d6445834f8867f8ad5e4f735 < b4af3806846778799cd4ab0766dc18341e777264 ; affected 1d658336b05f8697d6445834f8867f8ad5e4f735 < d79b9097a6a2b91471b40755f1225364be5d85ff
Linux · Linuxaffected 3.10 ; unaffected 0 < 3.10 ; unaffected 5.10.252 ≤ 5.10.* ; unaffected 5.15.202 ≤ 5.15.* ; unaffected 6.1.165 ≤ 6.1.* ; unaffected 6.6.128 ≤ 6.6.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD