{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2024-50072", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-10-21T19:36:19.940Z", "datePublished": "2024-10-29T00:50:14.170Z", "dateUpdated": "2024-11-08T15:58:12.545Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-11-08T15:58:12.545Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/bugs: Use code segment selector for VERW operand\n\nRobert Gill reported below #GP in 32-bit mode when dosemu software was\nexecuting vm86() system call:\n\n general protection fault: 0000 [#1] PREEMPT SMP\n CPU: 4 PID: 4610 Comm: dosemu.bin Not tainted 6.6.21-gentoo-x86 #1\n Hardware name: Dell Inc. PowerEdge 1950/0H723K, BIOS 2.7.0 10/30/2010\n EIP: restore_all_switch_stack+0xbe/0xcf\n EAX: 00000000 EBX: 00000000 ECX: 00000000 EDX: 00000000\n ESI: 00000000 EDI: 00000000 EBP: 00000000 ESP: ff8affdc\n DS: 0000 ES: 0000 FS: 0000 GS: 0033 SS: 0068 EFLAGS: 00010046\n CR0: 80050033 CR2: 00c2101c CR3: 04b6d000 CR4: 000406d0\n Call Trace:\n show_regs+0x70/0x78\n die_addr+0x29/0x70\n exc_general_protection+0x13c/0x348\n exc_bounds+0x98/0x98\n handle_exception+0x14d/0x14d\n exc_bounds+0x98/0x98\n restore_all_switch_stack+0xbe/0xcf\n exc_bounds+0x98/0x98\n restore_all_switch_stack+0xbe/0xcf\n\nThis only happens in 32-bit mode when VERW based mitigations like MDS/RFDS\nare enabled. This is because segment registers with an arbitrary user value\ncan result in #GP when executing VERW. Intel SDM vol. 2C documents the\nfollowing behavior for VERW instruction:\n\n #GP(0) - If a memory operand effective address is outside the CS, DS, ES,\n\t FS, or GS segment limit.\n\nCLEAR_CPU_BUFFERS macro executes VERW instruction before returning to user\nspace. Use %cs selector to reference VERW operand. This ensures VERW will\nnot #GP for an arbitrary user %ds.\n\n[ mingo: Fixed the SOB chain. ]"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/x86/include/asm/nospec-branch.h"], "versions": [{"version": "50f021f0b985", "lessThan": "bfd1d223d80c", "status": "affected", "versionType": "git"}, {"version": "d54de9f2a127", "lessThan": "ada431c6c31a", "status": "affected", "versionType": "git"}, {"version": "2e3087505ddb", "lessThan": "38c5fe74f3be", "status": "affected", "versionType": "git"}, {"version": "ca13d8cd8dac", "lessThan": "481b477ab63c", "status": "affected", "versionType": "git"}, {"version": "a0e2dab44d22", "lessThan": "bc576fbaf82d", "status": "affected", "versionType": "git"}, {"version": "a0e2dab44d22", "lessThan": "e4d210201854", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/x86/include/asm/nospec-branch.h"], "versions": [{"version": "6.8", "status": "affected"}, {"version": "0", "lessThan": "6.8", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.229", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.171", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.116", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.58", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.11.5", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12-rc4", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "references": [{"url": "https://git.kernel.org/stable/c/bfd1d223d80cb29a210caa1bd5e21f0816d58f02"}, {"url": "https://git.kernel.org/stable/c/ada431c6c31a2c8c37991c46089af5caa23a9c6e"}, {"url": "https://git.kernel.org/stable/c/38c5fe74f3bef98f75d16effa49836d50c9b6097"}, {"url": "https://git.kernel.org/stable/c/481b477ab63c7245715a3e57ba79eb87c2dc0d02"}, {"url": "https://git.kernel.org/stable/c/bc576fbaf82deded606e69a00efe9752136bf91d"}, {"url": "https://git.kernel.org/stable/c/e4d2102018542e3ae5e297bc6e229303abff8a0f"}], "title": "x86/bugs: Use code segment selector for VERW operand", "x_generator": {"engine": "bippy-9e1c9544281a"}}}}

{}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "5E2C9DA6-EADC-4426-9A6E-CF06497716BE", "versionEndExcluding": "5.11", "versionStartIncluding": "5.10.215", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "21EE109E-592F-4A01-B5D2-F078967481BA", "versionEndExcluding": "5.16", "versionStartIncluding": "5.15.154", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "67A7652D-50D6-4825-AB66-ECE5A0A5DC3A", "versionEndExcluding": "6.2", "versionStartIncluding": "6.1.81", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "A9536C02-22D6-445E-A8AF-FF25762F8DF4", "versionEndExcluding": "6.6.58", "versionStartIncluding": "6.6.21", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "6E62D61A-F704-44DB-A311-17B7534DA7BC", "versionEndExcluding": "6.11.5", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "739125EE-99C1-42E1-B870-04FD5010BA66", "versionEndExcluding": "6.8", "versionStartIncluding": "6.7.9", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:*", "matchCriteriaId": "7F361E1D-580F-4A2D-A509-7615F73167A1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc2:*:*:*:*:*:*", "matchCriteriaId": "925478D0-3E3D-4E6F-ACD5-09F28D5DF82C", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.12:rc3:*:*:*:*:*:*", "matchCriteriaId": "3C95E234-D335-4B6C-96BF-E2CEBD8654ED", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/bugs: Use code segment selector for VERW operand\n\nRobert Gill reported below #GP in 32-bit mode when dosemu software was\nexecuting vm86() system call:\n\n general protection fault: 0000 [#1] PREEMPT SMP\n CPU: 4 PID: 4610 Comm: dosemu.bin Not tainted 6.6.21-gentoo-x86 #1\n Hardware name: Dell Inc. PowerEdge 1950/0H723K, BIOS 2.7.0 10/30/2010\n EIP: restore_all_switch_stack+0xbe/0xcf\n EAX: 00000000 EBX: 00000000 ECX: 00000000 EDX: 00000000\n ESI: 00000000 EDI: 00000000 EBP: 00000000 ESP: ff8affdc\n DS: 0000 ES: 0000 FS: 0000 GS: 0033 SS: 0068 EFLAGS: 00010046\n CR0: 80050033 CR2: 00c2101c CR3: 04b6d000 CR4: 000406d0\n Call Trace:\n show_regs+0x70/0x78\n die_addr+0x29/0x70\n exc_general_protection+0x13c/0x348\n exc_bounds+0x98/0x98\n handle_exception+0x14d/0x14d\n exc_bounds+0x98/0x98\n restore_all_switch_stack+0xbe/0xcf\n exc_bounds+0x98/0x98\n restore_all_switch_stack+0xbe/0xcf\n\nThis only happens in 32-bit mode when VERW based mitigations like MDS/RFDS\nare enabled. This is because segment registers with an arbitrary user value\ncan result in #GP when executing VERW. Intel SDM vol. 2C documents the\nfollowing behavior for VERW instruction:\n\n #GP(0) - If a memory operand effective address is outside the CS, DS, ES,\n\t FS, or GS segment limit.\n\nCLEAR_CPU_BUFFERS macro executes VERW instruction before returning to user\nspace. Use %cs selector to reference VERW operand. This ensures VERW will\nnot #GP for an arbitrary user %ds.\n\n[ mingo: Fixed the SOB chain. ]"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: x86/bugs: Usar selector de segmento de c\u00f3digo para el operando VERW Robert Gill inform\u00f3 lo siguiente: #GP en modo de 32 bits cuando el software dosemu estaba ejecutando la llamada al sistema vm86(): error de protecci\u00f3n general: 0000 [#1] PREEMPT SMP CPU: 4 PID: 4610 Comm: dosemu.bin No contaminado 6.6.21-gentoo-x86 #1 Nombre del hardware: Dell Inc. PowerEdge 1950/0H723K, BIOS 2.7.0 30/10/2010 EIP: restore_all_switch_stack+0xbe/0xcf EAX: 00000000 EBX: 00000000 ECX: 00000000 EDX: 00000000 ESI: 00000000 EDI: 00000000 EBP: 00000000 ESP: ff8affdc DS: 0000 ES: 0000 FS: 0000 GS: 0033 SS: 0068 EFLAGS: 00010046 CR0: 80050033 CR2: 00c2101c CR3: 04b6d000 CR4: 000406d0 Seguimiento de llamadas: show_regs+0x70/0x78 die_addr+0x29/0x70 exc_general_protection+0x13c/0x348 exc_bounds+0x98/0x98 handle_exception+0x14d/0x14d exc_bounds+0x98/0x98 restore_all_switch_stack+0xbe/0xcf exc_bounds+0x98/0x98 restore_all_switch_stack+0xbe/0xcf Esto solo sucede en el modo de 32 bits cuando se habilitan las mitigaciones basadas en VERW como MDS/RFDS. Esto se debe a que los registros de segmento con un valor de usuario arbitrario pueden generar #GP al ejecutar VERW. Intel SDM vol. 2C documenta el siguiente comportamiento para la instrucci\u00f3n VERW: #GP(0) - Si la direcci\u00f3n efectiva de un operando de memoria est\u00e1 fuera del l\u00edmite de segmento CS, DS, ES, FS o GS. La macro CLEAR_CPU_BUFFERS ejecuta la instrucci\u00f3n VERW antes de regresar al espacio de usuario. Use el selector %cs para hacer referencia al operando VERW. Esto garantiza que VERW no genere #GP para un usuario arbitrario %ds. [ mingo: Se corrigi\u00f3 la cadena SOB. ]"}], "id": "CVE-2024-50072", "lastModified": "2024-11-08T16:15:45.547", "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": "2024-10-29T01:15:04.393", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/38c5fe74f3bef98f75d16effa49836d50c9b6097"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/481b477ab63c7245715a3e57ba79eb87c2dc0d02"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ada431c6c31a2c8c37991c46089af5caa23a9c6e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/bc576fbaf82deded606e69a00efe9752136bf91d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bfd1d223d80cb29a210caa1bd5e21f0816d58f02"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e4d2102018542e3ae5e297bc6e229303abff8a0f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: x86/bugs: Use code segment selector for VERW operand", "id": "2322309", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2322309"}, "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"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nx86/bugs: Use code segment selector for VERW operand\nRobert Gill reported below #GP in 32-bit mode when dosemu software was\nexecuting vm86() system call:\ngeneral protection fault: 0000 [#1] PREEMPT SMP\nCPU: 4 PID: 4610 Comm: dosemu.bin Not tainted 6.6.21-gentoo-x86 #1\nHardware name: Dell Inc. PowerEdge 1950/0H723K, BIOS 2.7.0 10/30/2010\nEIP: restore_all_switch_stack+0xbe/0xcf\nEAX: 00000000 EBX: 00000000 ECX: 00000000 EDX: 00000000\nESI: 00000000 EDI: 00000000 EBP: 00000000 ESP: ff8affdc\nDS: 0000 ES: 0000 FS: 0000 GS: 0033 SS: 0068 EFLAGS: 00010046\nCR0: 80050033 CR2: 00c2101c CR3: 04b6d000 CR4: 000406d0\nCall Trace:\nshow_regs+0x70/0x78\ndie_addr+0x29/0x70\nexc_general_protection+0x13c/0x348\nexc_bounds+0x98/0x98\nhandle_exception+0x14d/0x14d\nexc_bounds+0x98/0x98\nrestore_all_switch_stack+0xbe/0xcf\nexc_bounds+0x98/0x98\nrestore_all_switch_stack+0xbe/0xcf\nThis only happens in 32-bit mode when VERW based mitigations like MDS/RFDS\nare enabled. This is because segment registers with an arbitrary user value\ncan result in #GP when executing VERW. Intel SDM vol. 2C documents the\nfollowing behavior for VERW instruction:\n#GP(0) - If a memory operand effective address is outside the CS, DS, ES,\nFS, or GS segment limit.\nCLEAR_CPU_BUFFERS macro executes VERW instruction before returning to user\nspace. Use %cs selector to reference VERW operand. This ensures VERW will\nnot #GP for an arbitrary user %ds.\n[ mingo: Fixed the SOB chain. ]"], "name": "CVE-2024-50072", "package_state": [{"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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-10-29T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-50072\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-50072\nhttps://lore.kernel.org/linux-cve-announce/2024102934-CVE-2024-50072-14b5@gregkh/T"], "threat_severity": "Moderate"}