Skip to content
Heist/ feed
Unrated

mISDN: annotate data-race around dev->work

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: mISDN: annotate data-race around dev->work dev->work can re read locklessly in mISDN_read() and mISDN_poll(). Add READ_ONCE()/WRITE_ONCE() annotations. BUG: KCSAN: data-race in mISDN_ioctl / mISDN_read write to 0xffff88812d848280 of 4 bytes by task 10864 on cpu 1: misdn_add_timer drivers/isdn/mISDN/timerdev.c:175 [inline] mISDN_ioctl+0x2fb/0x550 drivers/isdn/mISDN/timerdev.c:233 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xce/0x140 fs/ioctl.c:583 __x64_sys_ioctl+0x43/0x50 fs/ioctl.c:583 x64_sys_call+0x14b0/0x3000 arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd8/0x2c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff88812d848280 of 4 bytes by task 10857 on cpu 0: mISDN_read+0x1f2/0x470 drivers/isdn/mISDN/timerdev.c:112 do_loop_readv_writev fs/read_write.c:847 [inline] vfs_readv+0x3fb/0x690 fs/read_write.c:1020 do_readv+0xe7/0x210 fs/read_write.c:1080 __do_sys_readv fs/read_write.c:1165 [inline] __se_sys_readv fs/read_write.c:1162 [inline] __x64_sys_readv+0x45/0x50 fs/read_write.c:1162 x64_sys_call+0x2831/0x3000 arch/x86/include/generated/asm/syscalls_64.h:20 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xd8/0x2c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x00000000 -> 0x00000001

Announced Source revision 1
Original source ↗

CVE-2026-23121

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-23121

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "1b2b03f8e514e4f68e293846ba511a948b80243c",
        "lessThan": "d5d99cb9e0839093cd53aa3b28176fce2f820ca0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "1b2b03f8e514e4f68e293846ba511a948b80243c",
        "lessThan": "13f3b3b87068898056db4c79ee67052fbde11d43",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "1b2b03f8e514e4f68e293846ba511a948b80243c",
        "lessThan": "accc3f8266d2a49881dbcf78c459477f4efa0ff3",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "1b2b03f8e514e4f68e293846ba511a948b80243c",
        "lessThan": "fc8ba17fd3337bd8b1913c30b95df0fee00d8fb7",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "1b2b03f8e514e4f68e293846ba511a948b80243c",
        "lessThan": "aa6e33cd74ca4965f2bbcb025e0b672fb0168a69",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "1b2b03f8e514e4f68e293846ba511a948b80243c",
        "lessThan": "7ac345a93af31358e18e9606eb7b354691bf6757",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "1b2b03f8e514e4f68e293846ba511a948b80243c",
        "lessThan": "8175dbf174d487afab81e936a862a8d9b8a1ccb6",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/isdn/mISDN/timerdev.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "2.6.27"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "2.6.27",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.249",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.199",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.162",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.122",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.68",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.8",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "6.19",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/isdn/mISDN/timerdev.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-23121

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#39759 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement