CVE-2022-50240 (GCVE-0-2022-50240)

Vulnerability from cvelistv5 – Published: 2025-09-15 14:01 – Updated: 2025-10-10 15:53
VLAI?
Summary
In the Linux kernel, the following vulnerability has been resolved: android: binder: stop saving a pointer to the VMA Do not record a pointer to a VMA outside of the mmap_lock for later use. This is unsafe and there are a number of failure paths *after* the recorded VMA pointer may be freed during setup. There is no callback to the driver to clear the saved pointer from generic mm code. Furthermore, the VMA pointer may become stale if any number of VMA operations end up freeing the VMA so saving it was fragile to being with. Instead, change the binder_alloc struct to record the start address of the VMA and use vma_lookup() to get the vma when needed. Add lockdep mmap_lock checks on updates to the vma pointer to ensure the lock is held and depend on that lock for synchronization of readers and writers - which was already the case anyways, so the smp_wmb()/smp_rmb() was not necessary. [akpm@linux-foundation.org: fix drivers/android/binder_alloc_selftest.c]
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: dd2283f2605e3b3e9c61bcae844b34f2afa4813f , < 27a594bc7a7c8238d239e3cdbcf2edfa3bbe9a1b (git)
Affected: dd2283f2605e3b3e9c61bcae844b34f2afa4813f , < 015ac18be7de25d17d6e5f1643cb3b60bfbe859e (git)
Affected: dd2283f2605e3b3e9c61bcae844b34f2afa4813f , < 622ef885a89ad04cfb76ee478fb44f051125d1f1 (git)
Affected: dd2283f2605e3b3e9c61bcae844b34f2afa4813f , < 925e6b6f82c9c80ab3c17acbde8d16f349da7d26 (git)
Affected: dd2283f2605e3b3e9c61bcae844b34f2afa4813f , < 1ec3f76a436d750fd5023caec5da0494fc2870d2 (git)
Affected: dd2283f2605e3b3e9c61bcae844b34f2afa4813f , < a43cfc87caaf46710c8027a8c23b8a55f1078f19 (git)
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    Linux Linux Affected: 4.20
Unaffected: 0 , < 4.20 (semver)
Unaffected: 5.4.224 , ≤ 5.4.* (semver)
Unaffected: 5.10.154 , ≤ 5.10.* (semver)
Unaffected: 5.15.61 , ≤ 5.15.* (semver)
Unaffected: 5.18.18 , ≤ 5.18.* (semver)
Unaffected: 5.19.2 , ≤ 5.19.* (semver)
Unaffected: 6.0 , ≤ * (original_commit_for_fix)
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{
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  }
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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