CVE-2022-49804

{"id": "CVE-2022-49804", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "[email protected]", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "published": "2025-05-01T15:16:03.717", "references": [{"url": "https://git.kernel.org/stable/c/a478952a8ac44e32316dc046a063a7dc34825aa6", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e3c11025bcd2142a61abe5806b2f86a0e78118df", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "[email protected]", "description": [{"lang": "en", "value": "CWE-787"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390: avoid using global register for current_stack_pointer\n\nCommit 30de14b1884b (\"s390: current_stack_pointer shouldn't be a\nfunction\") made current_stack_pointer a global register variable like\non many other architectures. Unfortunately on s390 it uncovers old\ngcc bug which is fixed only since gcc-9.1 [gcc commit 3ad7fed1cc87\n(\"S/390: Fix PR89775. Stackpointer save/restore instructions removed\")]\nand backported to gcc-8.4 and later. Due to this bug gcc versions prior\nto 8.4 generate broken code which leads to stack corruptions.\n\nCurrent minimal gcc version required to build the kernel is declared\nas 5.1. It is not possible to fix all old gcc versions, so work\naround this problem by avoiding using global register variable for\ncurrent_stack_pointer."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: s390: evitar el uso de un registro global para current_stack_pointer. El commit 30de14b1884b (\"s390: current_stack_pointer no deber\u00eda ser una funci\u00f3n\") convirti\u00f3 current_stack_pointer en una variable de registro global, como en muchas otras arquitecturas. Desafortunadamente, en s390, se descubre un antiguo error de gcc corregido solo desde gcc-9.1 [commit 3ad7fed1cc87 de gcc (\"S/390: Correcci\u00f3n de PR89775. Se eliminaron las instrucciones de guardado/restauraci\u00f3n de Stackpointer\")] y se ha retroportado a gcc-8.4 y posteriores. Debido a este error, las versiones de gcc anteriores a la 8.4 generan c\u00f3digo defectuoso que provoca corrupciones en la pila. La versi\u00f3n m\u00ednima actual de gcc requerida para compilar el kernel es la 5.1. No es posible corregir todas las versiones antiguas de gcc, por lo que se puede solucionar este problema evitando el uso de la variable de registro global para current_stack_pointer."}], "lastModified": "2025-11-07T19:20:12.617", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E76F82CE-AD9A-4014-864C-9B13A33767D4", "versionEndExcluding": "6.0.10", "versionStartIncluding": "5.18.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.18:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0384FA0A-DE99-48D7-84E3-46ED0C3B5E03"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.18:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "EAE6C6C5-4D21-4C04-897C-70CBBB3D7B91"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.18:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DA5F085D-52F3-4EE2-8353-455D1A6FE073"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.18:rc5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D6EE5B78-0D83-4715-893C-ABD69B49E7FC"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.18:rc6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "EE723F14-047B-4FCF-B109-E0542EDFB063"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.18:rc7:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2FCFCE58-5118-4D05-864E-C82CF20EABE5"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E7E331DA-1FB0-4DEC-91AC-7DA69D461C11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "17F0B248-42CF-4AE6-A469-BB1BAE7F4705"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E2422816-0C14-4B5E-A1E6-A9D776E5C49B"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1C6E00FE-5FB9-4D20-A1A1-5A32128F9B76"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.1:rc5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "35B26BE4-43A6-4A36-A7F6-5B3F572D9186"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}