CVE-2024-57839 - NFS Linux Kernel Readahead Hang Vulnerability

CVE-2024-57839 - NFS Linux Kernel Readahead Hang Vulnerability

https://cvefeed.io/rssfeed/latest.atom / Sat, 01/11/2025 - 18:34
CVE ID : CVE-2024-57839
Published : Jan. 11, 2025, 3:15 p.m. | 2 hours, 19 minutes ago
Description : In the Linux kernel, the following vulnerability has been resolved: Revert "readahead: properly shorten readahead when falling back to do_page_cache_ra()" This reverts commit 7c877586da3178974a8a94577b6045a48377ff25. Anders and Philippe have reported that recent kernels occasionally hang when used with NFS in readahead code. The problem has been bisected to 7c877586da3 ("readahead: properly shorten readahead when falling back to do_page_cache_ra()"). The cause of the problem is that ra->size can be shrunk by read_pages() call and subsequently we end up calling do_page_cache_ra() with negative (read huge positive) number of pages. Let's revert 7c877586da3 for now until we can find a proper way how the logic in read_pages() and page_cache_ra_order() can coexist. This can lead to reduced readahead throughput due to readahead window confusion but that's better than outright hangs.
Severity: 0.0 | NA
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