CVE-2026-55737
- Source
- https://cve.org/CVERecord?id=CVE-2026-55737
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-55737.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2026-55737
- Aliases
-
- EEF-CVE-2026-55737
- GHSA-446w-268v-9462
- Downstream
AZL (1)
DEBIAN (1)
openSUSE (2)
UBUNTU (1)
- Related
- Published
- 2026-07-27T15:13:54Z
- Modified
- 2026-11-12T05:00:25Z
- Severity
-
- 5.1 (Medium) CVSS_V4 - 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 CVSS Calculator
- Summary
- Heap pointer corruption via signed/unsigned mismatch in LARGE_TUPLE_EXT decoding in erts external term format decoder
- Details
-
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 integer (get_int32()) into an int. An arity wire value of 0x80000000 passes validation as 2147483648 but decodes as -2147483648, so the subsequent hp += n moves the heap allocation pointer backward. Neither pass enforces the runtime tuple-arity limit MAX_ARITYVAL. The result is an out-of-bounds heap write; in practice the VM detects an impossible heap size and aborts, denying service. The required padding is large when uncompressed but the compressed-ETF envelope shrinks it to a small payload on the wire.
This issue affects OTP from OTP 25.0 before OTP 27.3.4.15, OTP 28.5.0.4, and OTP 29.0.4, corresponding to erts from 13.0 before 15.2.7.11, 16.4.0.4, and 17.0.4.
- Database specific
{ "cna_assigner": "EEF", "cwe_ids": [ "CWE-195", "CWE-787" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55737.json", "unresolved_ranges": [ { "extracted_events": [ { "range": [ { "introduced": "25.0" }, { "fixed": "27.3.4.15" }, { "introduced": "13.0" }, { "fixed": "15.2.7.11" } ], "source": "AFFECTED_FIELD", "strategy": "ChangesAt" } ] } ] }- References
-
- https://cna.erlef.org/cves/CVE-2026-55737.html
- https://github.com
- https://osv.dev/vulnerability/EEF-CVE-2026-55737
- https://www.erlang.org/doc/system/versions.html#order-of-versions
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55737.json
- https://github.com/erlang/otp/security/advisories/GHSA-446w-268v-9462
- https://nvd.nist.gov/vuln/detail/CVE-2026-55737
- https://github.com/erlang/otp/commit/c5210b42a9d3d96f3d25601942ce8122be0f3761
- https://github.com/erlang/otp/commit/ebcbb97b4ec223464cac3d94375739a248ddef6e
- https://github.com/erlang/otp
Affected packages
Git / github.com/erlang/otp
Affected ranges
- Type
- GIT
- Repo
- https://github.com/erlang/otp
- Events
-
IntroducedFixedIntroducedFixedIntroducedFixedFixed
- Database specific
-
Show details
{ "extracted_events": [ { "cpe": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*", "range": [ { "introduced": "25.0" }, { "fixed": "27.3.4.15" } ], "source": "CPE_RANGE" }, { "cpe": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*", "range": [ { "introduced": "28.0" }, { "fixed": "28.5.0.4" } ], "source": "CPE_RANGE" }, { "cpe": "cpe:2.3:a:erlang:erlang\\/otp:*:*:*:*:*:*:*:*", "range": [ { "introduced": "29.0" }, { "fixed": "29.0.4" } ], "source": "CPE_RANGE" }, { "range": [ { "fixed": "c5210b42a9d3d96f3d25601942ce8122be0f3761" } ], "source": "REFERENCES_COMMIT" } ] }