CVE-2019-17263
In libyal libfwsi before 20191006, libfwsi_extension_block_copy_from_byte_stream in libfwsi_extension_block.c has a heap-based buffer over-read because rejection of an unsupported size only considers values less than 6, even though values of 6 and 7 are…
Does this matter?
Lower severity and a low EPSS score (0.54%). Track it; it rarely justifies an emergency change on its own.
Description
In libyal libfwsi before 20191006, libfwsi_extension_block_copy_from_byte_stream in libfwsi_extension_block.c has a heap-based buffer over-read because rejection of an unsupported size only considers values less than 6, even though values of 6 and 7 are also unsupported. NOTE: the vendor has disputed this as described in the GitHub issue
- CVSS 3.1
- 3.3 LOWCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
- EPSS
- 0.54% probability · 45th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-125
- Affected
- libfwsi project/libfwsi
- Source
- cve@mitre.org
EPSS 0.5% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://packetstormsecurity.com/files/154774/libyal-libfwsi-Buffer-Overread.htmlExploit, Third Party Advisory, VDB Entry
- https://github.com/libyal/libfwsi/compare/20181227...20191006Patch, Third Party Advisory
- https://github.com/libyal/libfwsi/issues/13Exploit, Third Party Advisory
- http://packetstormsecurity.com/files/154774/libyal-libfwsi-Buffer-Overread.htmlExploit, Third Party Advisory, VDB Entry
- https://github.com/libyal/libfwsi/compare/20181227...20191006Patch, Third Party Advisory
- https://github.com/libyal/libfwsi/issues/13Exploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.