CVE Explorer
CVE-2026-41992
GNU gzip contains a global buffer overflow vulnerability in the LZH decompression logic caused by improper reuse of shared global state between different decompression formats within a single execution. GNU gzip maintains a global array that is shared across the LZ77, LZW, and LZH decompression routines and is not reinitialized between files processed in the same invocation.
By decompressing a specially crafted LZW file followed by a specially crafted LZH file in a single gzip -d command, an att
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"unaffected","modules":["unlzh.c (LZH decompressor)","unlzw.c (LZW decompressor)","gzip.c (shared global state)"],"product":"gzip","repo":"https://cgit.git.savannah.gnu.org/cgit/gzip.git/","vendor":"GNU","versions":[{"lessThanOrEqual":"1.14","status":"affected","version":"0","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:2f6e5fdba584f30f8dc55aa6b5dfd28bda4e2c1d0c07139354bfa2d3ec0fe217 · sha256:a421eaa4cb1df52e… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"LOCAL","baseScore":6.9,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NON…
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:2f6e5fdba584f30f8dc55aa6b5dfd28bda4e2c1d0c07139354bfa2d3ec0fe217 · sha256:a421eaa4cb1df52e… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-126","description":"CWE-126: Buffer Over-read","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:2f6e5fdba584f30f8dc55aa6b5dfd28bda4e2c1d0c07139354bfa2d3ec0fe217 · sha256:a421eaa4cb1df52e… · /containers/cna/problemTypes/0/descriptions/0
Source references
3 source assertions{"tags":["third-party-advisory"],"url":"https://cert.pl/en/posts/2026/04/CVE-2026-41991/"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:2f6e5fdba584f30f8dc55aa6b5dfd28bda4e2c1d0c07139354bfa2d3ec0fe217 · sha256:a421eaa4cb1df52e… · /containers/cna/references/0
{"tags":["patch"],"url":"https://cgit.git.savannah.gnu.org/cgit/gzip.git/commit/?id=63dbf6b3b9e6e781df1a6a64e609b10e23969681"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:2f6e5fdba584f30f8dc55aa6b5dfd28bda4e2c1d0c07139354bfa2d3ec0fe217 · sha256:a421eaa4cb1df52e… · /containers/cna/references/2
{"tags":["product"],"url":"https://www.gnu.org/software/gzip/"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:2f6e5fdba584f30f8dc55aa6b5dfd28bda4e2c1d0c07139354bfa2d3ec0fe217 · sha256:a421eaa4cb1df52e… · /containers/cna/references/1
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.