In the Linux kernel, the following vulnerability has been resolved:
MIPS: Don't crash in stack_top() for tasks without ABI or vDSO
Not all tasks have an ABI associated or vDSO mapped,
for example kthreads never do.
If such a task ever ends up calling stack_top(), it will derefence the
NULL ABI pointer and crash.
This can for example happen when using kunit:
mips_stack_top+0x28/0xc0
arch_pick_mmap_layout+0x190/0x220
kunit_vm_mmap_init+0xf8/0x138
__kunit_add_resource+0x40/0xa8
kunit_vm_mmap+0x88/0xd8
usercopy_test_init+0xb8/0x240
kunit_try_run_case+0x5c/0x1a8
kunit_generic_run_threadfn_adapter+0x28/0x50
kthread+0x118/0x240
ret_from_kernel_thread+0x14/0x1c
Only dereference the ABI point if it is set.
The GIC page is also included as it is specific to the vDSO.
Also move the randomization adjustment into the same conditional.
References
Configurations
Configuration 1 (hide)
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Configuration 2 (hide)
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History
09 Jan 2026, 17:04
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://git.kernel.org/stable/c/24d098b6f69b0aa806ffcb3e18259bee31650b28 - Patch | |
| References | () https://git.kernel.org/stable/c/5b6839b572b503609b9b58bc6c04a816eefa0794 - Patch | |
| References | () https://git.kernel.org/stable/c/82d140f6aab5e89a9d3972697a0dbe1498752d9b - Patch | |
| References | () https://git.kernel.org/stable/c/ab18e48a503230d675e824a0d68a108bdff42503 - Patch | |
| References | () https://git.kernel.org/stable/c/bd90dbd196831f5c2620736dc221db2634cf1e8e - Patch | |
| References | () https://git.kernel.org/stable/c/cddf47d20b0325dc8a4e57b833fe96e8f36c42a4 - Patch | |
| References | () https://git.kernel.org/stable/c/e78033e59444d257d095b73ce5d20625294f6ec2 - Patch | |
| References | () https://git.kernel.org/stable/c/e9f4a6b3421e936c3ee9d74710243897d74dbaa2 - Patch | |
| References | () https://git.kernel.org/stable/c/f22de2027b206ddfb8a075800bb5d0dacf2da4b8 - Patch | |
| References | () https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html - Third Party Advisory, Mailing List | |
| CWE | CWE-476 | |
| CPE | cpe:2.3:o:linux:linux_kernel:4.19:-:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:4.19:rc8:*:*:*:*:*:* cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
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| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| First Time |
Linux
Debian Debian debian Linux Linux linux Kernel |
03 Nov 2025, 18:16
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
04 Sep 2025, 16:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-09-04 16:15
Updated : 2026-01-09 17:04
NVD link : CVE-2025-38696
Mitre link : CVE-2025-38696
CVE.ORG link : CVE-2025-38696
JSON object : View
Products Affected
debian
- debian_linux
linux
- linux_kernel
CWE
CWE-476
NULL Pointer Dereference