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  4. CVE 2026 115501 ibm i is affected by a buffer overflow
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Back to active CVEs
Medium · CVSS 5.3CVE-2026-115501

IBM i is Affected By A Buffer Overflow Vulnerability in QFileSvr.400 File System []CVE-2026-115501

Answer in brief

CVE-2026-115501 records a Medium severity (CVSS 5.3) vulnerability in IBM i is Affected By A Buffer Overflow Vulnerability in QFileSvr.400 File System []. The current sources do not mark it as known exploited. The current feed maps IBM/i (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 Nov 13, 2026Updated Nov 13, 2026Source checked Nov 13, 2026First seen by HOL Nov 13, 2026Material review Nov 13, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 5.3
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 5.3. 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 IBM/i (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
IBM/igeneric7.6 || 7.5 || 7.4 || 7.3Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for IBM/i.
  2. 2Review the reported fix. Source-reported solution: IBM i Release5770-SS1  PTF Number(s)PTF Download Link(s)7.6SJ12288 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ12288 7.5SJ12287 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ12287 7.4SJ12286 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ12286 7.3SJ12285 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ12285 IBM recommends users running unsupported versions of affected products upgrade to a supported and fixed version of affected products.

Evidence timeline and material changes

  1. Published upstream

    Nov 13, 2026

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

  2. Source modified

    Nov 13, 2026

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

  3. First seen by HOL

    Nov 13, 2026

Sources and claim methodology

  • Source referenceibm.com
Upstream source description

IBM i 7.3 7.4, 7.5, and 7.6 is vulnerable to a stack buffer overflow, caused by improper bounds checking in the QFileSvr.400 file system. By sending a command in the QFileSvr.400 file system, a local authenticated attacker could cause undefined behavior.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Dbus: stack out-of-bounds write in dbus _dbus_poll() select() fallback when file descriptor exceeds fd_setsizeAlso CWE-121

Record context

Vulnerability class
Buffer Overflow
EPSS
Not reported
CWE IDs
CWE-121
Source
CVE List V5
Source checked
Nov 13, 2026
References
1 linked source
Open source record