CVE-2024-57927

Summary

In the Linux kernel, the following vulnerability has been resolved:

nfs: Fix oops in nfs_netfs_init_request() when copying to cache

When netfslib wants to copy some data that has just been read on behalf of nfs, it creates a new write request and calls nfs_netfs_init_request() to initialise it, but with a NULL file pointer. This causes nfs_file_open_context() to oops - however, we don't actually need the nfs context as we're only going to write to the cache.

Fix this by just returning if we aren't given a file pointer and emit a warning if the request was for something other than copy-to-cache.

Further, fix nfs_netfs_free_request() so that it doesn't try to free the context if the pointer is NULL.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxee4cdf7ba857a894ad1650d6ab77669cbbfa329e < 13a07cc81e2d116cece727a83746c74b87a9d417affected
LinuxLinuxee4cdf7ba857a894ad1650d6ab77669cbbfa329e < 86ad1a58f6a9453f49e06ef957a40a8dac00a13faffected
LinuxLinux6.12affected
LinuxLinux0 < 6.12unaffected
LinuxLinux6.12.10 <= 6.12.*unaffected
LinuxLinux6.13 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References