CVE-2025-39697

Summary

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

NFS: Fix a race when updating an existing write

After nfs_lock_and_join_requests() tests for whether the request is still attached to the mapping, nothing prevents a call to nfs_inode_remove_request() from succeeding until we actually lock the page group. The reason is that whoever called nfs_inode_remove_request() doesn't necessarily have a lock on the page group head.

So in order to avoid races, let's take the page group lock earlier in nfs_lock_and_join_requests(), and hold it across the removal of the request in nfs_inode_remove_request().

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxbd37d6fce184836bd5e7cd90ce40116a4fadaf2a < 0ff42a32784e0f2cb46a46da8e9f473538c13e1baffected
LinuxLinuxbd37d6fce184836bd5e7cd90ce40116a4fadaf2a < f230d40147cc37eb3aef4d50e2e2c06ea73d9a77affected
LinuxLinuxbd37d6fce184836bd5e7cd90ce40116a4fadaf2a < c32e3c71aaa1c1ba05da88605e2ddd493c58794faffected
LinuxLinuxbd37d6fce184836bd5e7cd90ce40116a4fadaf2a < 181feb41f0b268e6288bf9a7b984624d7fe2031daffected
LinuxLinuxbd37d6fce184836bd5e7cd90ce40116a4fadaf2a < 92278ae36935a54e65fef9f8ea8efe7e80481aceaffected
LinuxLinuxbd37d6fce184836bd5e7cd90ce40116a4fadaf2a < 202a3432d21ac060629a760fff3b0a39859da3eaaffected
LinuxLinuxbd37d6fce184836bd5e7cd90ce40116a4fadaf2a < 76d2e3890fb169168c73f2e4f8375c7cc24a765eaffected
LinuxLinux4.14affected
LinuxLinux0 < 4.14unaffected
LinuxLinux5.10.242 <= 5.10.*unaffected
LinuxLinux5.15.191 <= 5.15.*unaffected
LinuxLinux6.1.150 <= 6.1.*unaffected
LinuxLinux6.6.104 <= 6.6.*unaffected
LinuxLinux6.12.44 <= 6.12.*unaffected
LinuxLinux6.16.4 <= 6.16.*unaffected
LinuxLinux6.17 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

Additional References

CISA ADP Vulnrichment

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

References