CVE-2026-43124

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invalid address\nand cause crashes.\n\nAdd proper NULL checking for vmap() failures."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/pstore/ram_core.c"], "versions": [{"version": "831b624df1b420c8f9281ed1307a8db23afb72df", "lessThan": "d47234840aeb4182ed3ee795c578b1dfa9cbd25b", "status": "affected", "versionType": "git"}, {"version": "831b624df1b420c8f9281ed1307a8db23afb72df", "lessThan": "49918dd52615097529811d21ec6074dd02ebe77c", "status": "affected", "versionType": "git"}, {"version": "831b624df1b420c8f9281ed1307a8db23afb72df", "lessThan": "8baa234181f632cabacf73e4834a910859e9fcc9", "status": "affected", "versionType": "git"}, {"version": "831b624df1b420c8f9281ed1307a8db23afb72df", "lessThan": "1da904e84de608907662ad8a51ba9c571d61e003", "status": "affected", "versionType": "git"}, {"version": "831b624df1b420c8f9281ed1307a8db23afb72df", "lessThan": 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"https://git.kernel.org/stable/c/49918dd52615097529811d21ec6074dd02ebe77c"}, {"url": "https://git.kernel.org/stable/c/8baa234181f632cabacf73e4834a910859e9fcc9"}, {"url": "https://git.kernel.org/stable/c/1da904e84de608907662ad8a51ba9c571d61e003"}, {"url": "https://git.kernel.org/stable/c/8d849adfbc3e98417fb541620568db1a759ef441"}, {"url": "https://git.kernel.org/stable/c/2c99326dc1c79b7ce3c8dd92929b5ce724ff70eb"}, {"url": "https://git.kernel.org/stable/c/88d5b28f63c7aac1271784e3b800ed405d1cde75"}, {"url": "https://git.kernel.org/stable/c/05363abc7625cf18c96e67f50673cd07f11da5e9"}], "title": "pstore: ram_core: fix incorrect success return when vmap() fails", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-43124", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-06T15:28:51.783666Z"}}}], "title": "CISA 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"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\npstore: ram_core: fix incorrect success return when vmap() fails\n\nIn persistent_ram_vmap(), vmap() may return NULL on failure.\n\nIf offset is non-zero, adding offset_in_page(start) causes the function\nto return a non-NULL pointer even though the mapping failed.\npersistent_ram_buffer_map() therefore incorrectly returns success.\n\nSubsequent access to prz->buffer may dereference an invalid address\nand cause crashes.\n\nAdd proper NULL checking for vmap() failures."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\npstore: ram_core: corregir el retorno de \u00e9xito incorrecto cuando vmap() falla\n\nEn persistent_ram_vmap(), vmap() puede devolver NULL en caso de fallo.\n\nSi el offset no es cero, a\u00f1adir offset_in_page(start) hace que la funci\u00f3n devuelva un puntero no-NULL aunque el mapeo fall\u00f3. persistent_ram_buffer_map() por lo tanto devuelve \u00e9xito incorrectamente.\n\nEl acceso subsiguiente a prz -> buffer puede desreferenciar una direcci\u00f3n inv\u00e1lida y causar fallos.\n\nA\u00f1adir una comprobaci\u00f3n de NULL adecuada para los fallos de vmap()."}], "id": "CVE-2026-43124", "lastModified": "2026-11-11T21:10:00.200", "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"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-43124", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T15:28:51.783666Z", "version": "2.0.3"}}]}, "published": "2026-05-06T12:16:29.313", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/05363abc7625cf18c96e67f50673cd07f11da5e9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1da904e84de608907662ad8a51ba9c571d61e003"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2c99326dc1c79b7ce3c8dd92929b5ce724ff70eb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/49918dd52615097529811d21ec6074dd02ebe77c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/88d5b28f63c7aac1271784e3b800ed405d1cde75"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8baa234181f632cabacf73e4834a910859e9fcc9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8d849adfbc3e98417fb541620568db1a759ef441"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d47234840aeb4182ed3ee795c578b1dfa9cbd25b"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: pstore: ram_core: fix incorrect success return when vmap() fails", "id": "2467170", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467170"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-253", "details": ["A flaw was found in the Linux kernel's pstore ram_core component. A local attacker could exploit a vulnerability where the `persistent_ram_buffer_map()` function incorrectly returns success even when the underlying `vmap()` memory mapping operation fails. This occurs if a non-zero offset is used, leading to attempts to access an invalid memory address. Successful exploitation of this flaw would result in a system crash, causing a Denial of Service (DoS)."], "name": "CVE-2026-43124", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "impact": "moderate", "package_name": "ruby4.0", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-05-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43124\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43124\nhttps://lore.kernel.org/linux-cve-announce/2026050619-CVE-2026-43124-8141@gregkh/T"], "threat_severity": "Moderate"}

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