Critical CVE issued for hallucinated SQLite vulnerability

# SQLite Critical CVEs or LLM Slop? | JFrog Source: [https://research.jfrog.com/post/sqlite-critical-cves-or-llm-slops/](https://research.jfrog.com/post/sqlite-critical-cves-or-llm-slops/)  Over the past few days, a newly created GitHub repo \([**programmervuln/cveadvisory\-**](https://github.com/programmervuln/cveadvisory-)\) published a batch of SQLite vulnerability advisories \(as part of other 50\+ CVEs which we believe are also LLM slop except from one\)\. NVD quickly flagged these as critical, and CISA's ADP agreed\. But when JFrog security researchers dug in to verify, the claims fell apart: 1. The cited code didn't even exist in those versions or referenced unrelated logic\. 2. When testing the PoC payloads they didn’t work \(not triggering any crash\)\. 3. None of these CVEs are listed on SQLite’s official advisory page \(which is a gold standard for tracking actual vulnerabilities\)\. 4. All advisories in this repo seem AI generated when testing them with[Gptzero](https://app.gptzero.me/)  *Combining all advisories into one file triggers AI\-generated content warnings* This made us question the reliability of these CVEs as well as understanding that these CVEs may be LLM slop\. While investigating one of the CVEs yesterday, CVE\-2026\-51302, we saw that Red Hat initially assigned it a 10\.0 Critical severity score:  Looking at the CVE again today, we noticed that the score has since been downgraded to 7\.6 High\.  CVEReported FlawCVSSNVD MetadataAudit Finding**CVE\-2026\-51302**UAF in`exprComputeOperands\(\)`**9\.8 CRITICAL**Pinned CPE: 3\.41\.0The advisory mentions non\-existing functions\.**CVE\-2026\-51303**UAF in`ExprListDelete\(\)`back\-refs**9\.8 CRITICAL**Contradictory metadataThe advisory said there are non\-existent fixes\.**CVE\-2026\-51300**UAF in`sqlite3ExprDelete\(\)`**9\.1 CRITICAL**n/a placeholdersAdvisory cited lines that are unrelated to the vulnerability\.**CVE\-2026\-51297**UAF via`jsonBlobEdit\(\)`**8\.8 HIGH**Pinned CPE: 3\.41\.0The advisory mentions non\-existing functions\.**CVE\-2026\-51296**UAF in`jsonRemoveFunc`**7\.5 HIGH**Populated CPE: 3\.41\.0Advisory cited lines that do not exist\.**CVE\-2026\-51304**UAF via`pOrderBy\-\>nExpr`post\-free**7\.5 HIGH**Vendor/Product: n/aAdvisory showed a real function with a wrong argument number\.To verify these reports thoroughly, we established an isolated testing workflow: - **Source Inspection:**We cloned the official sqlite/sqlite repository and checked out the target tags \(version\-3\.41\.0, version\-3\.51\.2, and version\-3\.51\.3\)\. We compared the reported vulnerability mechanics against the actual source code\. - **Clean Environment Build:**Compiled the official SQLite releases directly inside isolated Docker containers to prevent environmental contamination\. - **PoC Execution:**Feed each advisory's PoC SQL statements verbatim into the compiled SQLite binaries under AddressSanitizer \(ASan\) instrumentation to detect memory bugs\. - **NVD & Metadata Audit:**Evaluated the CPE patterns and advisory metadata across NVD and GHSA feeds to cross\-check tracking accuracy\. **Reported Vulnerability:**The advisory claims a heap use\-after\-free occurs when`sqlite3ReleaseTempReg\(\)`leaves a dangling pointer in`regFree1`, which is later dereferenced by`exprComputeOperands\(\)`\. **Finding:**The primary issue here is that`exprComputeOperands\(\)`didn't exist in SQLite 3\.41\. It was added in the middle of 2025 \(commits[e24f20a](https://github.com/sqlite/sqlite/commit/e24f20a),[280559b](https://github.com/sqlite/sqlite/commit/280559b)\)\. Furthermore, the mechanics of`sqlite3ReleaseTempReg\(\)`do not involve heap deallocation\. The function simply recycles register indices into an array for reuse, making a UAF impossible by design\. ``` /* expr.c:6562, SQLite 3.41.0 */ void sqlite3ReleaseTempReg(Parse *pParse, int iReg){ if( iReg ){ sqlite3VdbeReleaseRegisters(pParse, iReg, 1, 0, 0); if( pParse->nTempReg < ArraySize(pParse->aTempReg) ){ pParse->aTempReg[pParse->nTempReg++] = iReg; } } } ``` **PoC Testing:**The query ran successfully without triggering a crash because the bug does not exist\. **Reported Vulnerability:**Claims that`ExprListDelete\(\)`fails to clear back\-references in parent structures when releasing child nodes, allegedly patched in version 3\.51\.3\. **Finding:**There is no evidence of back\-reference pointers in the`Expr`,`Select`, or`Window`structures that could lead to such a state\. Most tellingly, a diff between 3\.51\.2 and 3\.51\.3 shows absolutely no changes to`src/expr\.c`\. The "patch" was entirely fabricated\. **PoC Testing:**The PoC is invalid SQL and fails at the parser stage, never actually hitting the execution logic\. **Reported Vulnerability:**Claims a UAF occurs in`sqlite3ExprDelete\(\)`because a left\-hand expression pointer is not cleared, referencing specific line numbers in`expr\.c`\. **Finding:**The cited line numbers \(`1012`and`1026`\) are a comment and a memory allocation call respectively, neither has anything to do with`pLeft`or deletion logic\. While the function is called during OOM error handling, it occurs at the end of a scope where the pointer is never reused, preventing any potential UAF\. ``` /* expr.c:1330, SQLite 3.41.0 */ void sqlite3ExprDelete(sqlite3 *db, Expr *p){ if( p ) sqlite3ExprDeleteNN(db, p); } ``` **PoC Testing:**Executed successfully as a valid SQL query, returning expected output with zero memory leaks or errors\. **Reported Vulnerability:**Claims`jsonParseFree\(\)`leaves dangling references that are later accessed by`jsonBlobEdit\(\)`\. **Finding:**Similar to the first case,`jsonBlobEdit\(\)`was not present in the reported target version \(3\.41\.0\)\. It was only introduced later as part of the JSONB implementation\. In the target version,`jsonParseFree\(\)`is used strictly in destructors where the surrounding structure is immediately discarded\. **PoC Testing:**The PoC hits a malformed JSON error immediately, meaning the code never reaches the JSON modification logic where the vulnerability supposedly exists\. **Reported Vulnerability:**Reports a UAF in`jsonRemoveFunc`specifically at lines`3555`and`3575`of`json\.c`\. **Finding:**In version 3\.41\.0,`src/json\.c`is only`2706`lines long\. The cited line numbers don't exist\. The actual implementation of the function was found roughly 2000 lines earlier, and an audit of that code showed no memory management flaws\. **PoC Testing:**The payload fails during JSON parsing, leaving the memory untouched\. **Reported Vulnerability:**Claims`sqlite3ExprListDelete\(pOrderBy\)`frees the ordering list while subsequent code reads`pOrderBy\-\>nExpr`\. **Finding:**The single\-argument signature reported in the advisory does not exist\. the actual signature requires a pointer to the database context \(`sqlite3 \*db`\)\. Furthermore, SQLite explicitly nulls pointers immediately after deletion: ``` /* select.c:3761, SQLite 3.41.0 */ sqlite3ExprListDelete(db, pPrior->pOrderBy); pPrior->pOrderBy = 0; /* Pointer immediately cleared; impossible to dereference */ ``` **PoC Testing:**The PoC payload executed against a 20\-column ORDER BY query processed normally, returning sorted results with no issues\. The CVE submission process via MITRE's public form lacks any real identity verification, meaning virtually anyone can submit a vulnerability description and propose a CVSS score\. Historically, NIST acted as a reliable safety net for this system, experts at the National Vulnerability Database \(NVD\) manually analyzed, validated, and enriched incoming CVEs before giving them a stamp of approval\. But that safety net broke in[February 2024](https://nvd.nist.gov/general/news/nvd-program-transition-announcement)\. Hit by a massive surge in vulnerability reports, NIST effectively hit pause on deep analysis\. CISA and other Authorized Data Publishers \(ADPs\) tried to step in with their own enrichment efforts, but the global pipeline is now fragmented and drowning in a massive backlog\. Because no step in today's system actually requires a proof\-of\-concept or bug reproduction, a plausible\-sounding fake advisory can slide right through the pipeline and end up in GHSA, downstream databases, and enterprise scanners\. This incident demonstrates a systemic issue with automated vulnerability ingestion\. A broader audit of 55 advisories published by the same GitHub account revealed that 54 were completely fabricated, while one contained a real bug wrapped in unverified CVE metadata\. **Red Flags to Spot Slop CVEs:** - **Missing Vendor Corroboration:**No mention of the issue on official maintainer security pages \(e\.g\.,[sqlite\.org/cves\.html](https://sqlite.org/cves.html)\)\. - **Absent Commit History:**No commit hash or pull request linked in reference fields\. - **Metadata Contradictions:**Empty CPE product definitions or version ranges that conflict with the advisory narrative\. - **Non\-existent Code References:**Citing functions that do not exist in the claimed target version or line numbers past EOF\. These LLM slop CVEs can cause organizations to waste time investigating and patching vulnerabilities that do not actually exist, as well as polluting vulnerability databases\. In environments where Critical vulnerabilities are automatically prioritized or tickets are opened based on vulnerability scores, such fabricated CVEs can turn into a real burden\. In environments where AI is used to automate vulnerability triage and remediation this becomes even more concerning\. An AI agent that encounters a fabricated CVE may attempt to locate the vulnerable function, generate a patch, or recommend changes based on code that does not even exist\. Instead of helping security teams remediate real vulnerabilities, it can lead them down a completely wrong path, potentially introducing unnecessary changes and wasting time\. To avoid being affected by this kind of vulnerability noise: - Don't blindly trust newly published CVEs by unknown/unvalidated sources\. - Investigate such critical CVEs to understand whether the score matches the vulnerability\. - Check if your environment is truly affected by the CVE\. - Reproduce the reported issue with the provided PoC whenever possible in a safe environment\. We have also formally reported these findings to GHSA, Redhat and NVD to assist in the remediation of these records\.