CVE Explorer

CVE-2026-56289

GNU patch is vulnerable to a denial of service (DoS) due to improper validation of hunk (single block of changes in diff) line offsets in unified-diff input. A specially crafted patch can specify an extremely large line number, causing the application to enter an effectively infinite processing loop while attempting to locate the requested position. This results in excessive CPU consumption and prevents the process from completing. An attacker can trigger this behavior by supplying a malicious p

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:f4ed2ddb9b42c408c64b1c98cff157dcf5eb93332af8c258485262ddc2146979

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"defaultStatus":"unaffected","product":"patch","repo":"https://cgit.git.savannah.gnu.org/cgit/patch.git/","vendor":"GNU","versions":[{"lessThanOrEqual":"2.8.0","status":"affected","version":"0","versionType":"semver"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:2e0cb3faa68b0a1d14aef7549461448edd5befab044bdb79b99a2d60e4eb2aae · sha256:52453c2350393877… · /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":4.6,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"ACTIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":"…

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:2e0cb3faa68b0a1d14aef7549461448edd5befab044bdb79b99a2d60e4eb2aae · sha256:52453c2350393877… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion

{"cweId":"CWE-835","description":"CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:2e0cb3faa68b0a1d14aef7549461448edd5befab044bdb79b99a2d60e4eb2aae · sha256:52453c2350393877… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions

{"tags":["third-party-advisory"],"url":"https://cert.pl/en/posts/2026/07/CVE-2026-56288"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:2e0cb3faa68b0a1d14aef7549461448edd5befab044bdb79b99a2d60e4eb2aae · sha256:52453c2350393877… · /containers/cna/references/0

{"tags":["product"],"url":"https://cgit.git.savannah.gnu.org/cgit/patch.git/"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:2e0cb3faa68b0a1d14aef7549461448edd5befab044bdb79b99a2d60e4eb2aae · sha256:52453c2350393877… · /containers/cna/references/1

{"tags":["patch"],"url":"https://cgit.git.savannah.gnu.org/cgit/patch.git/commit/?id=faba04ef4f2b410257f76c1b9dc85e350929c4b9"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:2e0cb3faa68b0a1d14aef7549461448edd5befab044bdb79b99a2d60e4eb2aae · sha256:52453c2350393877… · /containers/cna/references/2

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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