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Back to active CVEs
Unknown severity · Source severity not reportedCVE-2026-98559

net/smc: fix UAF on lgr list traversal in smcr_port_err()CVE-2026-98559

Answer in brief

CVE-2026-98559 records a Unknown severity vulnerability in net/smc: fix UAF on lgr list traversal in smcr_port_err(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 18, 2026Updated Oct 19, 2026Source checked Oct 25, 2026First seen by HOL Oct 18, 2026Material review Oct 19, 2026
Upstream Advisory

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
Not reported
Source
CVE List V5
Source checked
Oct 25, 2026
References
7 linked sources
Open source record

Key facts

Risk
Unknown severitySource severity not reported
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Linuxgeneric>=541afa10c126b6c22c2a805a559c70cc41fd156e <34bcf11cd2528ae00bb6d764d808083c66824277 || >=541afa10c126b6c22c2a805a559c70cc41fd156e <0edcc4284392b28826b5d37532b366b291e6e0fa || >=541afa10c126b6c22c2a805a559c70cc41fd156e <00a59600ae72d24859d0ad1783a78bc921bc2599 || >=541afa10c126b6c22c2a805a559c70cc41fd156e <3d35f069e1c119992000d51236dbe54da2d4e61e || >=541afa10c126b6c22c2a805a559c70cc41fd156e <3d65a2eb4449fc9658fb860dea893025d028d90e || >=541afa10c126b6c22c2a805a559c70cc41fd156e <a9b968e42690d784c241a0761c10253271f7df5d || >=541afa10c126b6c22c2a805a559c70cc41fd156e <61cb282fe97b3b0ba32ca09417a693162bf4ae3f34bcf11cd2528ae00bb6d764d808083c66824277, 0edcc4284392b28826b5d37532b366b291e6e0fa, 00a59600ae72d24859d0ad1783a78bc921bc2599, 3d35f069e1c119992000d51236dbe54da2d4e61e, 3d65a2eb4449fc9658fb860dea893025d028d90e, a9b968e42690d784c241a0761c10253271f7df5d, 61cb282fe97b3b0ba32ca09417a693162bf4ae3f
Linux/Linuxgeneric5.8Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to 34bcf11cd2528ae00bb6d764d808083c66824277 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 18, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 19, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 18, 2026

Sources and claim methodology

  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
Upstream source description

In the Linux kernel, the following vulnerability has been resolved: net/smc: fix UAF on lgr list traversal in smcr_port_err() smcr_port_err() traverses smc_lgr_list.list without holding smc_lgr_list.lock, allowing a concurrent smc_lgr_terminate_sched() to free an lgr while it is still being dereferenced. Hold smc_lgr_list.lock across the traversal. Update smc_ib_gid_check() to call smcr_port_err() after releasing the lock.

Quoted source text, attributed separately from HOL analysis.