CVE-2026-23121— mISDN: annotate data-race around dev->work
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I. Basic Information for CVE-2026-23121
Vulnerability Information
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Vulnerability Title
mISDN: annotate data-race around dev->work
Source: NVD (National Vulnerability Database)
Vulnerability Description
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
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于mISDN中dev->work字段存在数据竞争，可能导致读写不一致。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-23121
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Same Patch Batch · Linux · 2026-02-14 · 108 CVEs total
| CVE-2026-23193 | 8.8 HIGH | scsi: target: iscsi: Fix use-after-free in iscsit_dec_session_usage_count() |
| CVE-2026-23172 | 8.4 HIGH | net: wwan: t7xx: fix potential skb->frags overflow in RX path |
| CVE-2026-23209 | 7.8 HIGH | macvlan: fix error recovery in macvlan_common_newlink() |
| CVE-2026-23178 | 7.8 HIGH | HID: i2c-hid: fix potential buffer overflow in i2c_hid_get_report() |
| CVE-2026-23184 | 7.8 HIGH | binder: fix UAF in binder_netlink_report() |
| CVE-2026-23185 | 7.8 HIGH | wifi: iwlwifi: mld: cancel mlo_scan_start_wk |
| CVE-2026-23171 | 7.8 HIGH | bonding: fix use-after-free due to enslave fail after slave array update |
| CVE-2026-23169 | 7.8 HIGH | mptcp: fix race in mptcp_pm_nl_flush_addrs_doit() |
| CVE-2026-23191 | 7.8 HIGH | ALSA: aloop: Fix racy access at PCM trigger |
| CVE-2026-23192 | 7.8 HIGH | linkwatch: use __dev_put() in callers to prevent UAF |
| CVE-2026-23198 | 7.8 HIGH | KVM: Don't clobber irqfd routing type when deassigning irqfd |
| CVE-2026-23148 | 7.5 HIGH | nvmet: fix race in nvmet_bio_done() leading to NULL pointer dereference |
| CVE-2026-23136 | 7.5 HIGH | libceph: reset sparse-read state in osd_fault() |
| CVE-2026-23139 | 7.5 HIGH | netfilter: nf_conncount: update last_gc only when GC has been performed |
| CVE-2026-23161 | 7.3 HIGH | mm/shmem, swap: fix race of truncate and swap entry split |
| CVE-2026-23204 | 7.1 HIGH | net/sched: cls_u32: use skb_header_pointer_careful() |
| CVE-2026-23195 | 7.0 HIGH | cgroup/dmem: avoid pool UAF |
| CVE-2026-23180 | 7.0 HIGH | dpaa2-switch: add bounds check for if_id in IRQ handler |
| CVE-2026-23175 | 7.0 HIGH | net: cpsw: Execute ndo_set_rx_mode callback in a work queue |
| CVE-2026-23141 | btrfs: send: check for inline extents in range_is_hole_in_parent() |
Showing top 20 of 108 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
Same vendor: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
V. Comments for CVE-2026-23121
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