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CVE-2026-63729

The SyncTeX parser (synctex_parser.c) shipped with TeX Live and embedded by downstream consumers such as GNOME Evince contains a heap use-after-free vulnerability that allows attackers to crash applications or potentially execute arbitrary code by supplying a malformed .synctex or .synctex.gz file. A malformed SyncTeX file can construct a ref node with a NULL parent pointer, causing the replacement routine to fail to detach the node from its sibling chain, which triggers recursive freeing of liv
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:e548fe3dd8f91fd03f177713d9f6ea2ebd5fcebb0b6ea82b22c5ac0b1841fda4
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"LOCAL","baseScore":6.8,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"ACTIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact"…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:6090c593ad8b3943d88ea2533247166bf1b959fc2a3e69b3d0a7f53d5737ef55 · sha256:08e061cbdc14751e… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":6.6,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:6090c593ad8b3943d88ea2533247166bf1b959fc2a3e69b3d0a7f53d5737ef55 · sha256:08e061cbdc14751e… · /containers/cna/metrics/1/cvssV3_1

Affected products and versions

1 source assertion
{"defaultStatus":"affected","product":"TeX Live","vendor":"TeX Live","versions":[{"lessThanOrEqual":"TeX Live 2025","status":"affected","version":"0","versionType":"custom"},{"status":"unaffected","version":"TeX Live 2026","versionType":"custom"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:6090c593ad8b3943d88ea2533247166bf1b959fc2a3e69b3d0a7f53d5737ef55 · sha256:08e061cbdc14751e… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"LOCAL","baseScore":6.8,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"ACTIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact"…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:6090c593ad8b3943d88ea2533247166bf1b959fc2a3e69b3d0a7f53d5737ef55 · sha256:08e061cbdc14751e… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":6.6,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:6090c593ad8b3943d88ea2533247166bf1b959fc2a3e69b3d0a7f53d5737ef55 · sha256:08e061cbdc14751e… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-416","description":"Use After Free","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:6090c593ad8b3943d88ea2533247166bf1b959fc2a3e69b3d0a7f53d5737ef55 · sha256:08e061cbdc14751e… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"name":"Blog Post","url":"https://fatihhcelik.github.io/posts/evince-synctex-heap-use-after-free/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6090c593ad8b3943d88ea2533247166bf1b959fc2a3e69b3d0a7f53d5737ef55 · sha256:08e061cbdc14751e… · /containers/cna/references/2
{"name":"Product","tags":["product"],"url":"https://github.com/TeX-Live/texlive-source/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6090c593ad8b3943d88ea2533247166bf1b959fc2a3e69b3d0a7f53d5737ef55 · sha256:08e061cbdc14751e… · /containers/cna/references/0
{"name":"Patch Commit","tags":["patch"],"url":"https://github.com/TeX-Live/texlive-source/commit/002dcd3eac30db5c352f53d4181737961cc7ee9a"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6090c593ad8b3943d88ea2533247166bf1b959fc2a3e69b3d0a7f53d5737ef55 · sha256:08e061cbdc14751e… · /containers/cna/references/1
{"tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/tex-live-synctex-parser-heap-use-after-free-via-malformed-synctex-file"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6090c593ad8b3943d88ea2533247166bf1b959fc2a3e69b3d0a7f53d5737ef55 · sha256:08e061cbdc14751e… · /containers/cna/references/3

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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