CVE-2024-50152

Summary

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

smb: client: fix possible double free in smb2_set_ea()

Clang static checker(scan-build) warning： fs/smb/client/smb2ops.c:1304:2: Attempt to free released memory. 1304 | kfree(ea); | ^~~~~~~~~

There is a double free in such case: 'ea is initialized to NULL' -> 'first successful memory allocation for ea' -> 'something failed, goto sea_exit' -> 'first memory release for ea' -> 'goto replay_again' -> 'second goto sea_exit before allocate memory for ea' -> 'second memory release for ea resulted in double free'.

Re-initialie 'ea' to NULL near to the replay_again label, it can fix this double free problem.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux433042a91f9373241307725b52de573933ffedbf < b1813c220b76f60b1727984794377c4aa849d4c1affected
LinuxLinux4f1fffa2376922f3d1d506e49c0fd445b023a28e < c9f758ecf2562dfdd4adf12c22921b5de8366123affected
LinuxLinux4f1fffa2376922f3d1d506e49c0fd445b023a28e < 19ebc1e6cab334a8193398d4152deb76019b5d34affected
LinuxLinux6.6.32 < 6.6.59affected
LinuxLinux6.8affected
LinuxLinux0 < 6.8unaffected
LinuxLinux6.6.59 <= 6.6.*unaffected
LinuxLinux6.11.6 <= 6.11.*unaffected
LinuxLinux6.12 <= *unaffected

Weaknesses

References