{"history":[{"alert":0,"cve":"CVE-2026-120758","id":23275,"kind":"epss","observed_at":1794500401,"payload":"{\"date\": \"2026-11-12\", \"epss\": 0.0014, \"percentile\": 0.03399}"},{"alert":0,"cve":"CVE-2026-120758","id":21113,"kind":"epss","observed_at":1794392402,"payload":"{\"date\": \"2026-11-10\", \"epss\": 0.0014, \"percentile\": 0.03378}"},{"alert":1,"cve":"CVE-2026-120758","id":21025,"kind":"cna","observed_at":1794392402,"payload":"{\"containers\": {\"adp\": [{\"metrics\": [{\"other\": {\"content\": {\"id\": \"CVE-2026-120758\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"role\": \"CISA Coordinator\", \"timestamp\": \"2026-11-03T17:51:46.159121Z\", \"version\": \"2.0.3\"}, \"type\": \"ssvc\"}}], \"providerMetadata\": {\"dateUpdated\": \"2026-11-03T17:52:03.376Z\", \"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\"}, \"title\": \"CISA ADP Vulnrichment\"}], \"cna\": {\"affected\": [{\"defaultStatus\": \"unaffected\", \"product\": \"HDF5\", \"vendor\": \"The HDF Group\", \"versions\": [{\"status\": \"affected\", \"version\": \"< 2.3.0\"}]}], \"descriptions\": [{\"lang\": \"en\", \"supportingMedia\": [{\"base64\": false, \"type\": \"text/html\", \"value\": \"HDF5 through 2.2.0 contains a NULL pointer dereference vulnerability in <code>H5HL_unprotect()</code> in <code>src/H5HL.c</code>. <code>H5HL_protect()</code> pins a single metadata cache entry for a local heap, either the heap prefix or the separate data block, and <code>H5HL_unprotect()</code> unpins it on the final unprotect. When the metadata cache destroys a corrupted local heap entry, <code>H5HL__prfx_dest()</code> unlinks it from the heap by setting <code>heap-&gt;prfx</code> or <code>heap-&gt;dblk</code> to NULL. A crafted HDF5 file can therefore reach <code>H5HL_unprotect()</code> with no cached object to unpin, and the function passes the NULL pointer to <code>H5AC_unpin_entry()</code>. This causes an assertion failure in debug builds and a NULL pointer dereference and crash in release builds. An attacker who can get a user or application to open and traverse a malicious file can cause a denial of service.&nbsp;&nbsp;\"}], \"value\": \"HDF5 through 2.2.0 contains a NULL pointer dereference vulnerability in H5HL_unprotect() in src/H5HL.c. H5HL_protect() pins a single metadata cache entry for a local heap, either the heap prefix or the separate data block, and H5HL_unprotect() unpins it on the final unprotect. When the metadata cache destroys a corrupted local heap entry, H5HL__prfx_dest() unlinks it from the heap by setting heap->prfx or heap->dblk to NULL. A crafted HDF5 file can therefore reach H5HL_unprotect() with no cached object to unpin, and the function passes the NULL pointer to H5AC_unpin_entry(). This causes an assertion failure in debug builds and a NULL pointer dereference and crash in release builds. An attacker who can get a user or application to open and traverse a malicious file can cause a denial of service.\"}], \"impacts\": [{\"capecId\": \"CAPEC-153\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CAPEC-153 Input Data Manipulation\"}]}], \"metrics\": [{\"cvssV4_0\": {\"Automatable\": \"NOT_DEFINED\", \"Recovery\": \"NOT_DEFINED\", \"Safety\": \"NOT_DEFINED\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"NONE\", \"attackVector\": \"LOCAL\", \"baseScore\": 5.4, \"baseSeverity\": \"MEDIUM\", \"exploitMaturity\": \"PROOF_OF_CONCEPT\", \"privilegesRequired\": \"NONE\", \"providerUrgency\": \"NOT_DEFINED\", \"subAvailabilityImpact\": \"NONE\", \"subConfidentialityImpact\": \"NONE\", \"subIntegrityImpact\": \"NONE\", \"userInteraction\": \"PASSIVE\", \"valueDensity\": \"NOT_DEFINED\", \"vectorString\": \"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P\", \"version\": \"4.0\", \"vulnAvailabilityImpact\": \"HIGH\", \"vulnConfidentialityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"NONE\", \"vulnerabilityResponseEffort\": \"NOT_DEFINED\"}, \"format\": \"CVSS\", \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"problemTypes\": [{\"descriptions\": [{\"cweId\": \"CWE-476\", \"description\": \"CWE-476 NULL pointer dereference\", \"lang\": \"en\", \"type\": \"CWE\"}]}], \"providerMetadata\": {\"dateUpdated\": \"2026-11-03T15:38:09.387Z\", \"orgId\": \"0253b833-3e77-4dfe-9d57-17db1a2f0a74\", \"shortName\": \"HDFG\"}, \"references\": [{\"url\": \"https://github.com/HDFGroup/hdf5/pull/6377\"}], \"source\": {\"discovery\": \"UNKNOWN\"}, \"title\": \"NULL Pointer Dereference in H5HL_unprotect via Corrupted File\", \"x_generator\": {\"engine\": \"Vulnogram 1.0.5\"}}}, \"cveMetadata\": {\"assignerOrgId\": \"0253b833-3e77-4dfe-9d57-17db1a2f0a74\", \"assignerShortName\": \"HDFG\", \"cveId\": \"CVE-2026-120758\", \"datePublished\": \"2026-11-03T15:38:09.387Z\", \"dateReserved\": \"2026-11-02T21:30:12.341Z\", \"dateUpdated\": \"2026-11-03T17:52:03.376Z\", \"state\": \"PUBLISHED\"}, \"dataType\": \"CVE_RECORD\", \"dataVersion\": \"5.2\"}"}],"record":{"affected":[{"defaultStatus":"unaffected","product":"HDF5","vendor":"The HDF Group","versions":[{"status":"affected","version":"< 2.3.0"}]}],"cna":{"containers":{"adp":[{"metrics":[{"other":{"content":{"id":"CVE-2026-120758","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-11-03T17:51:46.159121Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-11-03T17:52:03.376Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"defaultStatus":"unaffected","product":"HDF5","vendor":"The HDF Group","versions":[{"status":"affected","version":"< 2.3.0"}]}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"HDF5 through 2.2.0 contains a NULL pointer dereference vulnerability in <code>H5HL_unprotect()</code> in <code>src/H5HL.c</code>. <code>H5HL_protect()</code> pins a single metadata cache entry for a local heap, either the heap prefix or the separate data block, and <code>H5HL_unprotect()</code> unpins it on the final unprotect. When the metadata cache destroys a corrupted local heap entry, <code>H5HL__prfx_dest()</code> unlinks it from the heap by setting <code>heap-&gt;prfx</code> or <code>heap-&gt;dblk</code> to NULL. A crafted HDF5 file can therefore reach <code>H5HL_unprotect()</code> with no cached object to unpin, and the function passes the NULL pointer to <code>H5AC_unpin_entry()</code>. This causes an assertion failure in debug builds and a NULL pointer dereference and crash in release builds. An attacker who can get a user or application to open and traverse a malicious file can cause a denial of service.&nbsp;&nbsp;"}],"value":"HDF5 through 2.2.0 contains a NULL pointer dereference vulnerability in H5HL_unprotect() in src/H5HL.c. H5HL_protect() pins a single metadata cache entry for a local heap, either the heap prefix or the separate data block, and H5HL_unprotect() unpins it on the final unprotect. When the metadata cache destroys a corrupted local heap entry, H5HL__prfx_dest() unlinks it from the heap by setting heap->prfx or heap->dblk to NULL. A crafted HDF5 file can therefore reach H5HL_unprotect() with no cached object to unpin, and the function passes the NULL pointer to H5AC_unpin_entry(). This causes an assertion failure in debug builds and a NULL pointer dereference and crash in release builds. An attacker who can get a user or application to open and traverse a malicious file can cause a denial of service."}],"impacts":[{"capecId":"CAPEC-153","descriptions":[{"lang":"en","value":"CAPEC-153 Input Data Manipulation"}]}],"metrics":[{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"LOCAL","baseScore":5.4,"baseSeverity":"MEDIUM","exploitMaturity":"PROOF_OF_CONCEPT","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-476","description":"CWE-476 NULL pointer dereference","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-11-03T15:38:09.387Z","orgId":"0253b833-3e77-4dfe-9d57-17db1a2f0a74","shortName":"HDFG"},"references":[{"url":"https://github.com/HDFGroup/hdf5/pull/6377"}],"source":{"discovery":"UNKNOWN"},"title":"NULL Pointer Dereference in H5HL_unprotect via Corrupted File","x_generator":{"engine":"Vulnogram 1.0.5"}}},"cveMetadata":{"assignerOrgId":"0253b833-3e77-4dfe-9d57-17db1a2f0a74","assignerShortName":"HDFG","cveId":"CVE-2026-120758","datePublished":"2026-11-03T15:38:09.387Z","dateReserved":"2026-11-02T21:30:12.341Z","dateUpdated":"2026-11-03T17:52:03.376Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"cna_checked":1794500401,"cve":"CVE-2026-120758","description":"HDF5 through 2.2.0 contains a NULL pointer dereference vulnerability in H5HL_unprotect() in src/H5HL.c. H5HL_protect() pins a single metadata cache entry for a local heap, either the heap prefix or the separate data block, and H5HL_unprotect() unpins it on the final unprotect. When the metadata cache destroys a corrupted local heap entry, H5HL__prfx_dest() unlinks it from the heap by setting heap->prfx or heap->dblk to NULL. A crafted HDF5 file can therefore reach H5HL_unprotect() with no cached object to unpin, and the function passes the NULL pointer to H5AC_unpin_entry(). This causes an assertion failure in debug builds and a NULL pointer dereference and crash in release builds. An attacker who can get a user or application to open and traverse a malicious file can cause a denial of service.","epss":{"date":"2026-11-12","epss":0.0014,"percentile":0.03399},"epss_checked":1794522003,"first_seen":1794378631,"kev":null,"kev_checked":1794522003,"products":"The HDF Group HDF5","references":["https://github.com/HDFGroup/hdf5/pull/6377"],"score":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"LOCAL","baseScore":5.4,"baseSeverity":"MEDIUM","exploitMaturity":"PROOF_OF_CONCEPT","privilegesRequired":"NONE","provider":"HDFG","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnerabilityResponseEffort":"NOT_DEFINED"},"solutions":"","state":"PUBLISHED","title":"NULL Pointer Dereference in H5HL_unprotect via Corrupted File","updated_at":1794500401,"workarounds":""},"sources":[{"canonical_url":"https://www.bleepingcomputer.com/news/microsoft/microsoft-november-2026-patch-tuesday-fixes-1-235-flaws-outlook-zero-day/","id":375,"publisher":"BleepingComputer","title":"Microsoft November 2026 Patch Tuesday fixes 1,235 flaws, Outlook zero-day"}]}