{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-23121", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-01-13T15:37:45.970Z", "datePublished": "2026-02-14T15:09:51.912Z", "dateUpdated": "2026-06-11T17:53:36.537Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T22:00:32.188Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmISDN: annotate data-race around dev->work\n\ndev->work can re read locklessly in mISDN_read()\nand mISDN_poll(). Add READ_ONCE()/WRITE_ONCE() annotations.\n\nBUG: KCSAN: data-race in mISDN_ioctl / mISDN_read\n\nwrite to 0xffff88812d848280 of 4 bytes by task 10864 on cpu 1:\n misdn_add_timer drivers/isdn/mISDN/timerdev.c:175 [inline]\n mISDN_ioctl+0x2fb/0x550 drivers/isdn/mISDN/timerdev.c:233\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:597 [inline]\n __se_sys_ioctl+0xce/0x140 fs/ioctl.c:583\n __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:583\n x64_sys_call+0x14b0/0x3000 arch/x86/include/generated/asm/syscalls_64.h:17\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xd8/0x2c0 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nread to 0xffff88812d848280 of 4 bytes by task 10857 on cpu 0:\n mISDN_read+0x1f2/0x470 drivers/isdn/mISDN/timerdev.c:112\n do_loop_readv_writev fs/read_write.c:847 [inline]\n vfs_readv+0x3fb/0x690 fs/read_write.c:1020\n do_readv+0xe7/0x210 fs/read_write.c:1080\n __do_sys_readv fs/read_write.c:1165 [inline]\n __se_sys_readv fs/read_write.c:1162 [inline]\n __x64_sys_readv+0x45/0x50 fs/read_write.c:1162\n x64_sys_call+0x2831/0x3000 arch/x86/include/generated/asm/syscalls_64.h:20\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xd8/0x2c0 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nvalue changed: 0x00000000 -> 0x00000001" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/isdn/mISDN/timerdev.c" ], "versions": [ { "version": "1b2b03f8e514e4f68e293846ba511a948b80243c", "lessThan": "d5d99cb9e0839093cd53aa3b28176fce2f820ca0", "status": "affected", "versionType": "git" }, { "version": "1b2b03f8e514e4f68e293846ba511a948b80243c", "lessThan": "13f3b3b87068898056db4c79ee67052fbde11d43", "status": "affected", "versionType": "git" }, { "version": "1b2b03f8e514e4f68e293846ba511a948b80243c", "lessThan": "accc3f8266d2a49881dbcf78c459477f4efa0ff3", "status": "affected", "versionType": "git" }, { "version": "1b2b03f8e514e4f68e293846ba511a948b80243c", "lessThan": "fc8ba17fd3337bd8b1913c30b95df0fee00d8fb7", "status": "affected", "versionType": "git" }, { "version": "1b2b03f8e514e4f68e293846ba511a948b80243c", "lessThan": "aa6e33cd74ca4965f2bbcb025e0b672fb0168a69", "status": "affected", "versionType": "git" }, { "version": "1b2b03f8e514e4f68e293846ba511a948b80243c", "lessThan": "7ac345a93af31358e18e9606eb7b354691bf6757", "status": "affected", "versionType": "git" }, { "version": "1b2b03f8e514e4f68e293846ba511a948b80243c", "lessThan": "8175dbf174d487afab81e936a862a8d9b8a1ccb6", "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/isdn/mISDN/timerdev.c" ], "versions": [ { "version": "2.6.27", "status": "affected" }, { "version": "0", "lessThan": "2.6.27", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.249", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.199", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.162", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.122", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.68", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.8", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.19", "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": "2.6.27", "versionEndExcluding": "5.10.249" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "5.15.199" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "6.1.162" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "6.6.122" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "6.12.68" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "6.18.8" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.27", "versionEndExcluding": "6.19" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/d5d99cb9e0839093cd53aa3b28176fce2f820ca0" }, { "url": "https://git.kernel.org/stable/c/13f3b3b87068898056db4c79ee67052fbde11d43" }, { "url": "https://git.kernel.org/stable/c/accc3f8266d2a49881dbcf78c459477f4efa0ff3" }, { "url": "https://git.kernel.org/stable/c/fc8ba17fd3337bd8b1913c30b95df0fee00d8fb7" }, { "url": "https://git.kernel.org/stable/c/aa6e33cd74ca4965f2bbcb025e0b672fb0168a69" }, { "url": "https://git.kernel.org/stable/c/7ac345a93af31358e18e9606eb7b354691bf6757" }, { "url": "https://git.kernel.org/stable/c/8175dbf174d487afab81e936a862a8d9b8a1ccb6" } ], "title": "mISDN: annotate data-race around dev->work", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2026-23121", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2026-06-10T20:40:15.361866Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-11T17:53:36.537Z" } } ] } }