CVE-2025-71102— scs: fix a wrong parameter in __scs_magic
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I. Basic Information for CVE-2025-71102
Vulnerability Information
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Vulnerability Title
scs: fix a wrong parameter in __scs_magic
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: scs: fix a wrong parameter in __scs_magic __scs_magic() needs a 'void *' variable, but a 'struct task_struct *' is given. 'task_scs(tsk)' is the starting address of the task's shadow call stack, and '__scs_magic(task_scs(tsk))' is the end address of the task's shadow call stack. Here should be '__scs_magic(task_scs(tsk))'. The user-visible effect of this bug is that when CONFIG_DEBUG_STACK_USAGE is enabled, the shadow call stack usage checking function (scs_check_usage) would scan an incorrect memory range. This could lead 1. **Inaccurate stack usage reporting**: The function would calculate wrong usage statistics for the shadow call stack, potentially showing incorrect value in kmsg. 2. **Potential kernel crash**: If the value of __scs_magic(tsk)is greater than that of __scs_magic(task_scs(tsk)), the for loop may access unmapped memory, potentially causing a kernel panic. However, this scenario is unlikely because task_struct is allocated via the slab allocator (which typically returns lower addresses), while the shadow call stack returned by task_scs(tsk) is allocated via vmalloc(which typically returns higher addresses). However, since this is purely a debugging feature (CONFIG_DEBUG_STACK_USAGE), normal production systems should be not unaffected. The bug only impacts developers and testers who are actively debugging stack usage with this configuration enabled.
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__scs_magic函数参数错误，可能导致不准确的堆栈使用报告或内核崩溃。
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-2025-71102
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Same Patch Batch · Linux · 2026-01-14 · 43 CVEs total
| CVE-2025-71113 | crypto: af_alg - zero initialize memory allocated via sock_kmalloc | |
| CVE-2025-71123 | ext4: fix string copying in parse_apply_sb_mount_options() | |
| CVE-2025-71110 | mm/slub: reset KASAN tag in defer_free() before accessing freed memory | |
| CVE-2025-71111 | hwmon: (w83791d) Convert macros to functions to avoid TOCTOU | |
| CVE-2025-71108 | usb: typec: ucsi: Handle incorrect num_connectors capability | |
| CVE-2025-71106 | fs: PM: Fix reverse check in filesystems_freeze_callback() | |
| CVE-2025-71105 | f2fs: use global inline_xattr_slab instead of per-sb slab cache | |
| CVE-2025-71104 | KVM: x86: Fix VM hard lockup after prolonged inactivity with periodic HV timer | |
| CVE-2025-71103 | drm/msm: adreno: fix deferencing ifpc_reglist when not declared | |
| CVE-2025-71107 | f2fs: ensure node page reads complete before f2fs_put_super() finishes | |
| CVE-2025-71112 | net: hns3: add VLAN id validation before using | |
| CVE-2025-71114 | via_wdt: fix critical boot hang due to unnamed resource allocation | |
| CVE-2025-71115 | um: init cpu_tasks[] earlier | |
| CVE-2025-71116 | libceph: make decode_pool() more resilient against corrupted osdmaps | |
| CVE-2025-71117 | block: Remove queue freezing from several sysfs store callbacks | |
| CVE-2025-71118 | ACPICA: Avoid walking the Namespace if start_node is NULL | |
| CVE-2025-71120 | SUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf | |
| CVE-2025-71119 | powerpc/kexec: Enable SMT before waking offline CPUs | |
| CVE-2025-71121 | parisc: Do not reprogram affinitiy on ASP chip | |
| CVE-2025-71122 | iommufd/selftest: Check for overflow in IOMMU_TEST_OP_ADD_RESERVED |
Showing top 20 of 43 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-2025-71102
Anonymous User
2026-01-15 06:08:19Zaproxy alias impedit expedita quisquam pariatur exercitationem. Nemo rerum eveniet dolores rem quia dignissimos.