Description
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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
ea7e0480a4b695d0aa6b3fa99bd658a003122113 to < ab18e48a503230d675e824a0d68a108bdff42503affectedea7e0480a4b695d0aa6b3fa99bd658a003122113 to < e78033e59444d257d095b73ce5d20625294f6ec2affectedea7e0480a4b695d0aa6b3fa99bd658a003122113 to < bd90dbd196831f5c2620736dc221db2634cf1e8eaffectedea7e0480a4b695d0aa6b3fa99bd658a003122113 to < 5b6839b572b503609b9b58bc6c04a816eefa0794affectedea7e0480a4b695d0aa6b3fa99bd658a003122113 to < f22de2027b206ddfb8a075800bb5d0dacf2da4b8affectedea7e0480a4b695d0aa6b3fa99bd658a003122113 to < 82d140f6aab5e89a9d3972697a0dbe1498752d9baffectedea7e0480a4b695d0aa6b3fa99bd658a003122113 to < 24d098b6f69b0aa806ffcb3e18259bee31650b28affectedea7e0480a4b695d0aa6b3fa99bd658a003122113 to < cddf47d20b0325dc8a4e57b833fe96e8f36c42a4affectedea7e0480a4b695d0aa6b3fa99bd658a003122113 to < e9f4a6b3421e936c3ee9d74710243897d74dbaa2affected86717a97f9218de798c6d33e0014ab9325e18f56affectede4882348eaa9f5f052cb21d2a5aa99a063e4308baffected4.14.77 to < 4.15affected4.18.15 to < 4.19affected
Linux Linux
Default version status: affected
4.19affected0 to < 4.19unaffected5.4.297 to ≤ 5.4.*unaffected5.10.241 to ≤ 5.10.*unaffected5.15.190 to ≤ 5.15.*unaffected6.1.149 to ≤ 6.1.*unaffected6.6.103 to ≤ 6.6.*unaffected6.12.43 to ≤ 6.12.*unaffected6.15.11 to ≤ 6.15.*unaffected6.16.2 to ≤ 6.16.*unaffected6.17 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/ab18e48a503230d675e824a0d68a108bdff42503 ↗
- https://git.kernel.org/stable/c/e78033e59444d257d095b73ce5d20625294f6ec2 ↗
- https://git.kernel.org/stable/c/bd90dbd196831f5c2620736dc221db2634cf1e8e ↗
- https://git.kernel.org/stable/c/5b6839b572b503609b9b58bc6c04a816eefa0794 ↗
- https://git.kernel.org/stable/c/f22de2027b206ddfb8a075800bb5d0dacf2da4b8 ↗
- https://git.kernel.org/stable/c/82d140f6aab5e89a9d3972697a0dbe1498752d9b ↗
- https://git.kernel.org/stable/c/24d098b6f69b0aa806ffcb3e18259bee31650b28 ↗
- https://git.kernel.org/stable/c/cddf47d20b0325dc8a4e57b833fe96e8f36c42a4 ↗
- https://git.kernel.org/stable/c/e9f4a6b3421e936c3ee9d74710243897d74dbaa2 ↗
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-032379.html ↗