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CVE-2026-55737

Signed to Unsigned Conversion Error and Out-of-bounds Write vulnerability in Erlang OTP erts allows an attacker who can supply a crafted Erlang external term format (ETF) binary to binary_to_term/1 to corrupt the BEAM heap pointer and crash the virtual machine. When decoding a LARGE_TUPLE_EXT term, the validation pass decoded_size() in erts/emulator/beam/external.c reads the 32-bit arity field as unsigned (get_uint32()), while the decode pass dec_term() reads the same field as a signed 32-bit i
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:7e72a5ea1ee734670640b2dbe4ac70af3b1a7306cc146504aa4cf9225fe3aad8
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
2

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"cpes":["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["erlang","external"],"packageName":"erts","packageURL":"pkg:otp/erts?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp&vcs_url=git%20https:%2F%2Fgithub.com%2Ferlang%2Fotp.git","product":"OTP","programFiles":["emulator/beam/external.c"],"programRoutines":[{"name":"erlang:binary_to_term/1"},{"name":"erlang:binary_to_term/2"},{"name":"dec_term"},{"name":"decoded_size"}],"repo":"https://github.com/erlang/otp","vendor":"Erlang","versions":[{"changes":[{"at":"17.0.4","status":"unaffected"},{"at":"16.…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:12fb0904f29e6797e7f613d96b3ab0590c4ca995cb2ad364e6b6ad0e9ad27392 · sha256:64640402f2309f0f… · /containers/cna/affected/0

{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["erlang","external"],"packageName":"erlang/otp","packageURL":"pkg:github/erlang/otp","product":"OTP","programFiles":["erts/emulator/beam/external.c"],"programRoutines":[{"name":"erlang:binary_to_term/1"},{"name":"erlang:binary_to_term/2"},{"name":"dec_term"},{"name":"decoded_size"}],"repo":"https://github.com/erlang/otp","vendor":"Erlang","versions":[{"changes":[{"at":"29.0.4","status":"unaffected"},{"at":"28.5.0.4","status":"unaffected"},{"at":"27.3.4.15","sta…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:12fb0904f29e6797e7f613d96b3ab0590c4ca995cb2ad364e6b6ad0e9ad27392 · sha256:64640402f2309f0f… · /containers/cna/affected/1
cwe · 2 assertions

{"cweId":"CWE-787","description":"CWE-787 Out-of-bounds Write","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:12fb0904f29e6797e7f613d96b3ab0590c4ca995cb2ad364e6b6ad0e9ad27392 · sha256:64640402f2309f0f… · /containers/cna/problemTypes/0/descriptions/1

{"cweId":"CWE-195","description":"CWE-195 Signed to Unsigned Conversion Error","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:12fb0904f29e6797e7f613d96b3ab0590c4ca995cb2ad364e6b6ad0e9ad27392 · sha256:64640402f2309f0f… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

2 source assertions
{"cpes":["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["erlang","external"],"packageName":"erts","packageURL":"pkg:otp/erts?repository_url=https:%2F%2Fgithub.com%2Ferlang%2Fotp&vcs_url=git%20https:%2F%2Fgithub.com%2Ferlang%2Fotp.git","product":"OTP","programFiles":["emulator/beam/external.c"],"programRoutines":[{"name":"erlang:binary_to_term/1"},{"name":"erlang:binary_to_term/2"},{"name":"dec_term"},{"name":"decoded_size"}],"repo":"https://github.com/erlang/otp","vendor":"Erlang","versions":[{"changes":[{"at":"17.0.4","status":"unaffected"},{"at":"16.…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:12fb0904f29e6797e7f613d96b3ab0590c4ca995cb2ad364e6b6ad0e9ad27392 · sha256:64640402f2309f0f… · /containers/cna/affected/0
{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["erlang","external"],"packageName":"erlang/otp","packageURL":"pkg:github/erlang/otp","product":"OTP","programFiles":["erts/emulator/beam/external.c"],"programRoutines":[{"name":"erlang:binary_to_term/1"},{"name":"erlang:binary_to_term/2"},{"name":"dec_term"},{"name":"decoded_size"}],"repo":"https://github.com/erlang/otp","vendor":"Erlang","versions":[{"changes":[{"at":"29.0.4","status":"unaffected"},{"at":"28.5.0.4","status":"unaffected"},{"at":"27.3.4.15","sta…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:12fb0904f29e6797e7f613d96b3ab0590c4ca995cb2ad364e6b6ad0e9ad27392 · sha256:64640402f2309f0f… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"LOCAL","baseScore":5.1,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:12fb0904f29e6797e7f613d96b3ab0590c4ca995cb2ad364e6b6ad0e9ad27392 · sha256:64640402f2309f0f… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions
{"cweId":"CWE-787","description":"CWE-787 Out-of-bounds Write","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:12fb0904f29e6797e7f613d96b3ab0590c4ca995cb2ad364e6b6ad0e9ad27392 · sha256:64640402f2309f0f… · /containers/cna/problemTypes/0/descriptions/1
{"cweId":"CWE-195","description":"CWE-195 Signed to Unsigned Conversion Error","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:12fb0904f29e6797e7f613d96b3ab0590c4ca995cb2ad364e6b6ad0e9ad27392 · sha256:64640402f2309f0f… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"tags":["related"],"url":"https://cna.erlef.org/cves/CVE-2026-55737.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:12fb0904f29e6797e7f613d96b3ab0590c4ca995cb2ad364e6b6ad0e9ad27392 · sha256:64640402f2309f0f… · /containers/cna/references/1
{"tags":["patch"],"url":"https://github.com/erlang/otp/commit/c5210b42a9d3d96f3d25601942ce8122be0f3761"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:12fb0904f29e6797e7f613d96b3ab0590c4ca995cb2ad364e6b6ad0e9ad27392 · sha256:64640402f2309f0f… · /containers/cna/references/4
{"tags":["vendor-advisory","related"],"url":"https://github.com/erlang/otp/security/advisories/GHSA-446w-268v-9462"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:12fb0904f29e6797e7f613d96b3ab0590c4ca995cb2ad364e6b6ad0e9ad27392 · sha256:64640402f2309f0f… · /containers/cna/references/0
{"tags":["related"],"url":"https://osv.dev/vulnerability/EEF-CVE-2026-55737"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:12fb0904f29e6797e7f613d96b3ab0590c4ca995cb2ad364e6b6ad0e9ad27392 · sha256:64640402f2309f0f… · /containers/cna/references/2
{"tags":["x_version-scheme"],"url":"https://www.erlang.org/doc/system/versions.html#order-of-versions"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:12fb0904f29e6797e7f613d96b3ab0590c4ca995cb2ad364e6b6ad0e9ad27392 · sha256:64640402f2309f0f… · /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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