CVE-2025-38696

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Source
https://cve.org/CVERecord?id=CVE-2025-38696
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-38696.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-38696
Downstream
Related
Published
2025-09-04T15:32:48.973Z
Modified
2026-03-09T23:51:03.515280Z
Summary
MIPS: Don't crash in stack_top() for tasks without ABI or vDSO
Details

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.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38696.json",
    "cna_assigner": "Linux"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
ea7e0480a4b695d0aa6b3fa99bd658a003122113
Fixed
ab18e48a503230d675e824a0d68a108bdff42503
Fixed
e78033e59444d257d095b73ce5d20625294f6ec2
Fixed
bd90dbd196831f5c2620736dc221db2634cf1e8e
Fixed
5b6839b572b503609b9b58bc6c04a816eefa0794
Fixed
f22de2027b206ddfb8a075800bb5d0dacf2da4b8
Fixed
82d140f6aab5e89a9d3972697a0dbe1498752d9b
Fixed
24d098b6f69b0aa806ffcb3e18259bee31650b28
Fixed
cddf47d20b0325dc8a4e57b833fe96e8f36c42a4
Fixed
e9f4a6b3421e936c3ee9d74710243897d74dbaa2
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected
86717a97f9218de798c6d33e0014ab9325e18f56
Last affected
e4882348eaa9f5f052cb21d2a5aa99a063e4308b

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-38696.json"