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CVE-2026-56390

Medium priority
Needs evaluation

GNU Bison improperly handles grammar‑defined output paths. Grammar directives such as %output and %header allow specifying file paths, which are accepted without restriction and override caller‑supplied output options. When...

1 affected package

bison

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
bison Needs evaluation Needs evaluation Needs evaluation Needs evaluation Needs evaluation
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CVE-2026-56389

Medium priority
Fixed

GNU Bison allows for an execution of an arbitrary program during HTML report generation due to improper handling of grammar-defined configuration variables. A grammar file can override the executable used for the XML‑to‑HTML...

1 affected package

bison

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
bison Fixed Fixed Fixed Not affected Not affected
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CVE-2020-24980

Low priority
Not affected

Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultIDs: none. Reason: This candidate was withdrawn by its CNA. Further investigation showed that it was not a security issue. Notes: none

1 affected package

bison

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
bison Not affected Not affected
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CVE-2020-24979

Low priority
Not affected

Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultIDs: none. Reason: This candidate was withdrawn by its CNA. Further investigation showed that it was not a security issue. Notes: none

1 affected package

bison

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
bison Not affected Not affected
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CVE-2020-24240

Low priority
Vulnerable

GNU Bison before 3.7.1 has a use-after-free in _obstack_free in lib/obstack.c (called from gram_lex) when a '\0' byte is encountered. NOTE: there is a risk only if Bison is used with untrusted input, and the observed bug happens...

1 affected package

bison

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
bison Not affected Not affected Vulnerable Vulnerable Vulnerable
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CVE-2020-14150

Low priority
Needs evaluation

GNU Bison before 3.5.4 allows attackers to cause a denial of service (application crash). NOTE: there is a risk only if Bison is used with untrusted input, and an observed bug happens to cause unsafe behavior with a specific...

1 affected package

bison

Package 26.04 LTS 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
bison Not affected Not affected Not affected Needs evaluation Needs evaluation
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