CVE-2024-36891 (GCVE-0-2024-36891)

Vulnerability from cvelistv5 – Published: 2024-05-30 15:28 – Updated: 2025-05-04 09:11
VLAI?
Title
maple_tree: fix mas_empty_area_rev() null pointer dereference
Summary
In the Linux kernel, the following vulnerability has been resolved: maple_tree: fix mas_empty_area_rev() null pointer dereference Currently the code calls mas_start() followed by mas_data_end() if the maple state is MA_START, but mas_start() may return with the maple state node == NULL. This will lead to a null pointer dereference when checking information in the NULL node, which is done in mas_data_end(). Avoid setting the offset if there is no node by waiting until after the maple state is checked for an empty or single entry state. A user could trigger the events to cause a kernel oops by unmapping all vmas to produce an empty maple tree, then mapping a vma that would cause the scenario described above.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 54a611b605901c7d5d05b6b8f5d04a6ceb0962aa , < 883e5d542bbdddbddeba60250cb482baf3ae2415 (git)
Affected: 54a611b605901c7d5d05b6b8f5d04a6ceb0962aa , < 6c9c7c1e63b198a8b979ad963eb21410f10ccb00 (git)
Affected: 54a611b605901c7d5d05b6b8f5d04a6ceb0962aa , < f3956791cf526540addd3295e4c1e0f0442486cc (git)
Affected: 54a611b605901c7d5d05b6b8f5d04a6ceb0962aa , < 955a923d2809803980ff574270f81510112be9cf (git)
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    Linux Linux Affected: 6.1
Unaffected: 0 , < 6.1 (semver)
Unaffected: 6.1.94 , ≤ 6.1.* (semver)
Unaffected: 6.6.31 , ≤ 6.6.* (semver)
Unaffected: 6.8.10 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
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  • 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.
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