{ "document":{ "aggregate_severity":{ "namespace":"https://nvd.nist.gov/vuln-metrics/cvss", "text":"HIGH" }, "category":"csaf_vex", "csaf_version":"2.0", "distribution":{ "tlp":{ "label":"WHITE", "url":"https:/www.first.org/tlp/" } }, "lang":"en", "notes":[ { "text":"In the Linux kernel, the following vulnerability has been resolved:\n\ntty: n_gsm: add sanity check for gsm->receive in gsm_receive_buf()\n\nA null pointer dereference can happen when attempting to access the\n\"gsm->receive()\" function in gsmld_receive_buf(). Currently, the code\nassumes that gsm->recieve is only called after MUX activation.\nSince the gsmld_receive_buf() function can be accessed without the need to\ninitialize the MUX, the gsm->receive() function will not be set and a\nNULL pointer dereference will occur.\n\nFix this by avoiding the call to \"gsm->receive()\" in case the function is\nnot initialized by adding a sanity check.\n\nCall Trace:\n \n gsmld_receive_buf+0x1c2/0x2f0 drivers/tty/n_gsm.c:2861\n tiocsti drivers/tty/tty_io.c:2293 [inline]\n tty_ioctl+0xa75/0x15d0 drivers/tty/tty_io.c:2692\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:870 [inline]\n __se_sys_ioctl fs/ioctl.c:856 [inline]\n __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd", "category":"general", "title":"Synopsis" } ], "publisher":{ "issuing_authority":"openEuler security committee", "name":"openEuler", "namespace":"https://www.openeuler.org", "contact_details":"openeuler-security@openeuler.org", "category":"vendor" }, "references":[ { "summary":"nvd cve", "category":"external", "url":"https://nvd.nist.gov/vuln/detail/CVE-2022-49940" }, { "summary":"CVE-2022-49940 vex file", "category":"self", "url":"https://repo.openeuler.org/security/data/csaf/cve/2022/csaf-openeuler-cve-2022-49940.json" }, { "summary":"openEuler-SA-2025-1821", "category":"self", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-1821" }, { "summary":"CVE-2022-49940", "category":"self", "url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2022-49940&packageName=kernel" } ], "title":"openEuler cve CVE-2022-49940", "tracking":{ "initial_release_date":"2025-07-11T20:21:21+08:00", "revision_history":[ { "date":"2025-07-11T20:21:21+08:00", "summary":"Initial", "number":"1.0.0" } ], "generator":{ "date":"2025-07-11T20:21:21+08:00", "engine":{ "name":"openEuler CSAF Tool V1.0" } }, "current_release_date":"2025-07-11T20:21:21+08:00", "id":"CVE-2022-49940", "version":"1.0.0", "status":"interim" } }, "product_tree":{ "branches":[ { "name":"openEuler", "category":"vendor", "branches":[ { "name":"openEuler", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:22.03-LTS-SP3" }, "product_id":"openEuler-22.03-LTS-SP3", "name":"openEuler-22.03-LTS-SP3" }, "name":"openEuler-22.03-LTS-SP3", "category":"product_version" } ], "category":"product_name" }, { "name":"aarch64", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:22.03-LTS-SP3" }, "product_id":"kernel-5.10.0-272.0.0.174.oe2203sp3.aarch64.rpm", "name":"kernel-5.10.0-272.0.0.174.oe2203sp3.aarch64.rpm" }, "name":"kernel-5.10.0-272.0.0.174.oe2203sp3.aarch64.rpm", "category":"product_version" }, { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:22.03-LTS-SP3" }, 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"category":"default_component_of" } ] }, "vulnerabilities":[ { "cve":"CVE-2022-49940", "notes":[ { "text":"In the Linux kernel, the following vulnerability has been resolved:\n\ntty: n_gsm: add sanity check for gsm->receive in gsm_receive_buf()\n\nA null pointer dereference can happen when attempting to access the\n\"gsm->receive()\" function in gsmld_receive_buf(). Currently, the code\nassumes that gsm->recieve is only called after MUX activation.\nSince the gsmld_receive_buf() function can be accessed without the need to\ninitialize the MUX, the gsm->receive() function will not be set and a\nNULL pointer dereference will occur.\n\nFix this by avoiding the call to \"gsm->receive()\" in case the function is\nnot initialized by adding a sanity check.\n\nCall Trace:\n \n gsmld_receive_buf+0x1c2/0x2f0 drivers/tty/n_gsm.c:2861\n tiocsti drivers/tty/tty_io.c:2293 [inline]\n tty_ioctl+0xa75/0x15d0 drivers/tty/tty_io.c:2692\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:870 [inline]\n __se_sys_ioctl fs/ioctl.c:856 [inline]\n __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd", "category":"description", "title":"Vulnerability Description" } ], "product_status":{ "fixed":[ 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