{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-43123", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:55.987Z", "datePublished": "2026-05-06T11:27:09.553Z", "dateUpdated": "2026-05-11T22:18:12.071Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T22:18:12.071Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfbcon: check return value of con2fb_acquire_newinfo()\n\nIf fbcon_open() fails when called from con2fb_acquire_newinfo() then\ninfo->fbcon_par pointer remains NULL which is later dereferenced.\n\nAdd check for return value of the function con2fb_acquire_newinfo() to\navoid it.\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/video/fbdev/core/fbcon.c"], "versions": [{"version": "d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e", "lessThan": "d3e535533767c85788529e626478718b7e95a59f", "status": "affected", "versionType": "git"}, {"version": "d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e", "lessThan": "3b5a754ec86bc6064af9aca76eb191c2405e6b0c", "status": "affected", "versionType": "git"}, {"version": "d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e", "lessThan": "a785c4e2a999c2d51dfcf40d317cfb30cc735d2c", "status": "affected", "versionType": "git"}, {"version": "d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e", "lessThan": "0b038c0be6827dd2dbb1ce4f8d92d97c80cbe9cc", "status": "affected", "versionType": "git"}, {"version": "d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e", "lessThan": "11a93180a70bb3095a9bd80d113d9277e30d9959", "status": "affected", "versionType": "git"}, {"version": "d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e", "lessThan": "f57b61624c86ef8f87f6e6b7dd0755de03d90e89", "status": "affected", "versionType": "git"}, {"version": "d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e", "lessThan": "011a0502801c8536f64141a2b61362c14f456544", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/video/fbdev/core/fbcon.c"], "versions": [{"version": "2.6.23", "status": "affected"}, {"version": "0", "lessThan": "2.6.23", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.203", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.165", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.128", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.75", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.16", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.6", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.23", "versionEndExcluding": "5.15.203"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.23", "versionEndExcluding": "6.1.165"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.23", "versionEndExcluding": "6.6.128"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.23", "versionEndExcluding": "6.12.75"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.23", "versionEndExcluding": "6.18.16"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.23", "versionEndExcluding": "6.19.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.23", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/d3e535533767c85788529e626478718b7e95a59f"}, {"url": "https://git.kernel.org/stable/c/3b5a754ec86bc6064af9aca76eb191c2405e6b0c"}, {"url": "https://git.kernel.org/stable/c/a785c4e2a999c2d51dfcf40d317cfb30cc735d2c"}, {"url": "https://git.kernel.org/stable/c/0b038c0be6827dd2dbb1ce4f8d92d97c80cbe9cc"}, {"url": "https://git.kernel.org/stable/c/11a93180a70bb3095a9bd80d113d9277e30d9959"}, {"url": "https://git.kernel.org/stable/c/f57b61624c86ef8f87f6e6b7dd0755de03d90e89"}, {"url": "https://git.kernel.org/stable/c/011a0502801c8536f64141a2b61362c14f456544"}], "title": "fbcon: check return value of con2fb_acquire_newinfo()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "67E17AC6-4F6C-4B24-9825-9C2DE3794E62", "versionEndExcluding": "5.15.203", "versionStartIncluding": "2.6.23", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "797C7F46-D0BE-4FB8-A502-C5EF8E6B6654", "versionEndExcluding": "6.1.165", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "851E9353-6C09-4CC9-877E-E09DB164A3C2", "versionEndExcluding": "6.6.128", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "BCE16369-98ED-41CF-8995-DFDC10B288D2", "versionEndExcluding": "6.12.75", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "B4B8CDA9-BADF-4CF5-8B3B-702DE8EEA40B", "versionEndExcluding": "6.18.16", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "373EEEDA-FAA1-4FB4-B6ED-DB4DD99DBE67", "versionEndExcluding": "6.19.6", "versionStartIncluding": "6.19", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfbcon: check return value of con2fb_acquire_newinfo()\n\nIf fbcon_open() fails when called from con2fb_acquire_newinfo() then\ninfo->fbcon_par pointer remains NULL which is later dereferenced.\n\nAdd check for return value of the function con2fb_acquire_newinfo() to\navoid it.\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE."}], "id": "CVE-2026-43123", "lastModified": "2026-05-12T21:17:55.990", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-05-06T12:16:29.180", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/011a0502801c8536f64141a2b61362c14f456544"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0b038c0be6827dd2dbb1ce4f8d92d97c80cbe9cc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/11a93180a70bb3095a9bd80d113d9277e30d9959"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3b5a754ec86bc6064af9aca76eb191c2405e6b0c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a785c4e2a999c2d51dfcf40d317cfb30cc735d2c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d3e535533767c85788529e626478718b7e95a59f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f57b61624c86ef8f87f6e6b7dd0755de03d90e89"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: fbcon: check return value of con2fb_acquire_newinfo()", "id": "2467067", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467067"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-252", "details": ["A flaw was found in the fbcon component of the Linux kernel. A local user could exploit a missing return value check in the con2fb_acquire_newinfo() function. This oversight can lead to a null pointer dereference, potentially causing a system crash and resulting in a Denial of Service (DoS)."], "name": "CVE-2026-43123", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43123\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43123\nhttps://lore.kernel.org/linux-cve-announce/2026050618-CVE-2026-43123-1166@gregkh/T"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e,d3e535533767c85788529e626478718b7e95a59f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e,3b5a754ec86bc6064af9aca76eb191c2405e6b0c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e,a785c4e2a999c2d51dfcf40d317cfb30cc735d2c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e,0b038c0be6827dd2dbb1ce4f8d92d97c80cbe9cc)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e,11a93180a70bb3095a9bd80d113d9277e30d9959)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e,f57b61624c86ef8f87f6e6b7dd0755de03d90e89)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e,011a0502801c8536f64141a2b61362c14f456544)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.6.23"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,2.6.23)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.203,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.165,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.128,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.75,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.16,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.6,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-05-06T13:30:04.848755+00:00", "updated": "2026-05-13T00:45:26.254654+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}