CVE-2026-45870SUNRPC: auth_gss: fix memory leaks in XDR decoding error paths
- 5.5MediumCVSS base score
- 0.16%Exploitation in 30 daysEPSS · top 95% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 14 days later
· 14 days later
Published
- 5 months later
· 5 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.16% · top 95% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected 1d658336b05f8697d6445834f8867f8ad5e4f735 – < c81431b1b9fbd21e9a5a9211b5517b7295d18e6a
- affected 1d658336b05f8697d6445834f8867f8ad5e4f735 – < caf7eff432e91a9eba1c79fa545c2f54be15d62b
- affected 1d658336b05f8697d6445834f8867f8ad5e4f735 – < 64303b92d94c0c7845a273acd8d84b796d6f1db7
- affected 1d658336b05f8697d6445834f8867f8ad5e4f735 – < df10f23defff22c8d55fe6db74f6e4ce927145bf
- affected 1d658336b05f8697d6445834f8867f8ad5e4f735 – < b4af3806846778799cd4ab0766dc18341e777264
- affected 1d658336b05f8697d6445834f8867f8ad5e4f735 – < d79b9097a6a2b91471b40755f1225364be5d85ff
- affected 1d658336b05f8697d6445834f8867f8ad5e4f735 – < 3b56eb90feb8a3709417f5624f3871847d42bcb1
- affected 1d658336b05f8697d6445834f8867f8ad5e4f735 – < 3e6397b056335cc56ef0e9da36c95946a19f5118
- affected 3.10
- unaffected < 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.*
- unaffected 6.12.75 – ≤ 6.12.*
- unaffected 6.18.14 – ≤ 6.18.*
- unaffected 6.19.4 – ≤ 6.19.*
- unaffected 7.0 – ≤ *
References
References8
- https://git.kernel.org/stable/c/c81431b1b9fbd21e9a5a9211b5517b7295d18e6a (opens in a new tab)
- https://git.kernel.org/stable/c/caf7eff432e91a9eba1c79fa545c2f54be15d62b (opens in a new tab)
- https://git.kernel.org/stable/c/64303b92d94c0c7845a273acd8d84b796d6f1db7 (opens in a new tab)
- https://git.kernel.org/stable/c/df10f23defff22c8d55fe6db74f6e4ce927145bf (opens in a new tab)
- https://git.kernel.org/stable/c/b4af3806846778799cd4ab0766dc18341e777264 (opens in a new tab)
- https://git.kernel.org/stable/c/d79b9097a6a2b91471b40755f1225364be5d85ff (opens in a new tab)
- https://git.kernel.org/stable/c/3b56eb90feb8a3709417f5624f3871847d42bcb1 (opens in a new tab)
- https://git.kernel.org/stable/c/3e6397b056335cc56ef0e9da36c95946a19f5118 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-32336 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-45870)Record last updated .