CVE-2026-93207 Affecting perf-debuginfo package, versions <0:5.14.0-687.58.1.el9_8


Severity

Recommended
high

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.47% (39th percentile)

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  • Snyk IDSNYK-ROCKY9-PERFDEBUGINFO-21157322
  • published17 Oct 2026
  • disclosed24 Sept 2026

Introduced: 24 Sep 2026

NewCVE-2026-93207  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:9 perf-debuginfo to version 0:5.14.0-687.58.1.el9_8 or higher.
This issue was patched in RLSA-2026:83156.

NVD Description

Note: Versions mentioned in the description apply only to the upstream perf-debuginfo package and not the perf-debuginfo package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:9 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

SUNRPC: Zero rpc_gss_wire_cred at svcauth_gss_decode_credbody() entry

svcauth_gss_decode_credbody() writes the caller's rpc_gss_wire_cred field by field and assigns gc_ctx.len only on the success tail. The caller storage is svcdata->clcred, which lives in the per-svc_rqst gss_svc_data and is reused across requests. Early decode failures leave partially decoded state mixed with residue from the prior request.

The trailing body_len tightness check is the sharpest case: xdr_stream_decode_opaque_inline() has already written gc_ctx.data with a borrowed inline pointer into the current request's XDR pages, but gc_ctx.len retains its prior value. Once the request pages are released the pooled clcred carries a dangling pointer paired with a stale length.

Zero the caller's rpc_gss_wire_cred at function entry so that every early-return path leaves a deterministic all-zero cred. On the trailing tightness-check path, gc_ctx.len is now zero instead of stale, which neuters length-driven consumers such as gss_svc_searchbyctx() that would otherwise walk the dangling data pointer.

CVSS Base Scores

version 3.1