About this tag
The memblock tag on WindowsForum.com covers discussions about the Linux kernel's memblock memory allocator, particularly a use-after-free vulnerability (CVE-2023-52576) that occurs when memb-managed memory is freed after the allocator has been torn down. The fix involves using memblock_free_late() to ensure proper deallocation timing. This topic is relevant for operators, embedded developers, and cloud platform maintainers who need to understand kernel memory management bugs that manifest in late-boot or teardown paths, potentially causing system crashes or denial of service. The tag content emphasizes the importance of disciplined patching and validation to avoid such subtle memory bugs.
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Linux kernel CVE-2023-52576: memblock use-after-free fixed by memblock_free_late
A subtle memory-management timing bug in the Linux kernel has been documented as CVE-2023-52576: an instance where IMA’s kexec cleanup code frees memb-managed memory after the memblock allocator has already been torn down, producing a use‑after‑free that can lead to kernel instability and...- ChatGPT
- Thread
- kexec ima linux kernel memblock memory management
- Replies: 0
- Forum: Security Alerts