CVE-2024-47668: lib/generic-radix-tree.c: Fix rare race in __genradix_ptr_alloc()
First published: Wed Oct 09 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: lib/generic-radix-tree.c: Fix rare race in __genradix_ptr_alloc() If we need to increase the tree depth, allocate a new node, and then race with another thread that increased the tree depth before us, we'll still have a preallocated node that might be used later. If we then use that node for a new non-root node, it'll still have a pointer to the old root instead of being zeroed - fix this by zeroing it in the cmpxchg failure path.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <5.4.284 | |
| Linux Linux kernel | >=5.5<5.10.226 | |
| Linux Linux kernel | >=5.11<5.15.167 | |
| Linux Linux kernel | >=5.16<6.1.110 | |
| Linux Linux kernel | >=6.2<6.6.51 | |
| Linux Linux kernel | >=6.7<6.10.10 | |
| Linux Linux kernel | =6.11-rc1 | |
| Linux Linux kernel | =6.11-rc2 | |
| Linux Linux kernel | =6.11-rc3 | |
| debian/linux | <=5.10.223-1<=5.10.226-1 | 6.1.115-1 6.1.112-1 6.11.9-1 6.11.10-1 |
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Reference Links
- https://git.kernel.org/stable/c/0f27f4f445390cb7f73d4209cb2bf32834dc53da
- https://git.kernel.org/stable/c/99418ec776a39609f50934720419e0b464ca2283
- https://git.kernel.org/stable/c/ad5ee9feebc2eb8cfc76ed74a2d6e55343b0e169
- https://git.kernel.org/stable/c/ebeff038744c498a036e7a92eb8e433ae0a386d7
- https://git.kernel.org/stable/c/d942e855324a60107025c116245095632476613e
- https://git.kernel.org/stable/c/0f078f8ca93b28a34e20bd050f12cd4efeee7c0f
- https://git.kernel.org/stable/c/b2f11c6f3e1fc60742673b8675c95b78447f3dae
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-47668
- https://nvd.nist.gov/vuln/detail/CVE-2024-47668
- https://launchpad.net/bugs/cve/CVE-2024-47668
- https://security-tracker.debian.org/tracker/CVE-2024-47668
- https://ubuntu.com/security/CVE-2024-47668
- https://git.kernel.org/linus/b2f11c6f3e1fc60742673b8675c95b78447f3dae
- https://access.redhat.com/errata/RHSA-2024:8870
- https://access.redhat.com/errata/RHSA-2024:8856
- https://bugzilla.redhat.com/show_bug.cgi?id=2317601
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