Paper/Archive/CVE-2024-50152

CVE-2024-50152

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

CVSS 9.8 (CNA)9.8 / 10 × 3029.4 Not in CISA KEV+300.0 EPSS percentile 41.5.415 × 208.3 No public exploit+100.0 SSVC exploitation: unknown+100.0

Description · from the CVE record

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

ProductAffectedFixed inSource

Linux433042a91f9373241307725b52de573933ffedbf – < b1813c220b76f60b1727984794377c4aa849d4c1b1813c220b76f60b1727984794377c4aa849d4c1CNA

Linux4f1fffa2376922f3d1d506e49c0fd445b023a28e – < c9f758ecf2562dfdd4adf12c22921b5de8366123c9f758ecf2562dfdd4adf12c22921b5de8366123CNA

Linux4f1fffa2376922f3d1d506e49c0fd445b023a28e – < 19ebc1e6cab334a8193398d4152deb76019b5d3419ebc1e6cab334a8193398d4152deb76019b5d34CNA

Linux6.6.32 – < 6.6.596.6.59CNA

Linux6.86.6.59CNA

Scores by source

Linux (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

refgit.kernel.org/stable/c/b1813c220b76f60b1727984794377c4aa849d4c1 refgit.kernel.org/stable/c/c9f758ecf2562dfdd4adf12c22921b5de8366123 refgit.kernel.org/stable/c/19ebc1e6cab334a8193398d4152deb76019b5d34