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CVE-2026-34962

barebox version prior to 2026.04.0 contains a denial-of-service vulnerability in ext4 directory parsing in fs/ext4/ext4_common.c where the ext4fs_iterate_dir() function fails to validate that directory entry length values are non-zero. Attackers can supply a malicious ext4 filesystem image with a crafted directory entry containing a direntlen value of 0 to cause an infinite loop during directory listing or path resolution, resulting in the boot process hanging indefinitely.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:8c674ae3c479a34872dc271dbd0a2979b4f3dc58ba201533d50ca7eee5a02751
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"LOCAL","baseScore":6.9,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","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:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:9a39cdfab6b67c0a5cdac8232eb1bbf5a66c3779d1bcf52d5125c0fba09ed4f8 · sha256:e17c0d576dec222e… · /containers/cna/metrics/1/cvssV4_0

{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":6.2,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:9a39cdfab6b67c0a5cdac8232eb1bbf5a66c3779d1bcf52d5125c0fba09ed4f8 · sha256:e17c0d576dec222e… · /containers/cna/metrics/0/cvssV3_1

Affected products and versions

1 source assertion
{"defaultStatus":"unknown","product":"barebox","vendor":"barebox","versions":[{"lessThan":"2026.04.0","status":"affected","version":"0","versionType":"git"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:9a39cdfab6b67c0a5cdac8232eb1bbf5a66c3779d1bcf52d5125c0fba09ed4f8 · sha256:e17c0d576dec222e… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"LOCAL","baseScore":6.9,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","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:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:9a39cdfab6b67c0a5cdac8232eb1bbf5a66c3779d1bcf52d5125c0fba09ed4f8 · sha256:e17c0d576dec222e… · /containers/cna/metrics/1/cvssV4_0
{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":6.2,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:9a39cdfab6b67c0a5cdac8232eb1bbf5a66c3779d1bcf52d5125c0fba09ed4f8 · sha256:e17c0d576dec222e… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-835","description":"Loop with Unreachable Exit Condition ('Infinite Loop')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:9a39cdfab6b67c0a5cdac8232eb1bbf5a66c3779d1bcf52d5125c0fba09ed4f8 · sha256:e17c0d576dec222e… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"tags":["product"],"url":"https://github.com/barebox/barebox"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9a39cdfab6b67c0a5cdac8232eb1bbf5a66c3779d1bcf52d5125c0fba09ed4f8 · sha256:e17c0d576dec222e… · /containers/cna/references/0
{"tags":["patch"],"url":"https://github.com/barebox/barebox/releases/tag/v2026.04.0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9a39cdfab6b67c0a5cdac8232eb1bbf5a66c3779d1bcf52d5125c0fba09ed4f8 · sha256:e17c0d576dec222e… · /containers/cna/references/1
{"tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/barebox-ext4-directory-parsing-infinite-loop-denial-of-service"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9a39cdfab6b67c0a5cdac8232eb1bbf5a66c3779d1bcf52d5125c0fba09ed4f8 · sha256:e17c0d576dec222e… · /containers/cna/references/2
{"name":"Blog Post","tags":["technical-description"],"url":"https://y637f9qq2x.com/posts/barebox-sandbox-vulns/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:9a39cdfab6b67c0a5cdac8232eb1bbf5a66c3779d1bcf52d5125c0fba09ed4f8 · sha256:e17c0d576dec222e… · /containers/cna/references/3

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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