CVE-2024-49883

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: ext4: aovid use-after-free in ext4_ext_insert_extent() As Ojaswin mentioned in Link, in ext4_ext_insert_extent(), if the path is reallocated in ext4_ext_create_new_leaf(), we'll use the stale path and cause UAF. Below is a sample trace with dummy values: ext4_ext_insert_extent path = *ppath = 2000 ext4_ext_create_new_leaf(ppath) ext4_find_extent(ppath) path = *ppath = 2000 if (depth > path[0].p_maxdepth) kfree(path = 2000); *ppath = path = NULL; path = kcalloc() = 3000 *ppath = 3000; return path; /* here path is still 2000,...

Affected product and versions

Product

Linux Linux, debian linux, linux kernel

Affected versions

>= 10809df84a4d868db61af621bae3658494165279 < e17ebe4fdd7665c93ae9459ba40fcdfb76769ac1, >= 10809df84a4d868db61af621bae3658494165279 < 975ca06f3fd154c5f7742083e7b2574c57d1c0c3, >= 10809df84a4d868db61af621bae3658494165279 < 5e811066c5ab709b070659197dccfb80ab650ddd, >= 10809df84a4d868db61af621bae3658494165279 < 9df59009dfc6d9fc1bd9ddf6c5ab6e56d6ed887a, >= 10809df84a4d868db61af621bae3658494165279 < 51db04892a993cace63415be99848970a0f15ef2, >= 10809df84a4d868db61af621bae3658494165279 < 8162ee5d94b8c0351be0a9321be134872a7654a1, >= 10809df84a4d868db61af621bae3658494165279 < beb7b66fb489041c50c6473100b383f7a51648fc, >= 10809df84a4d868db61af621bae3658494165279 < bfed082ce4b1ce6349b05c09a0fa4f3da35ecb1b, >= 10809df84a4d868db61af621bae3658494165279 < a164f3a432aae62ca23d03e6d926b122ee5b860d, >= 3.18, 11.0, >= 3.18 < 4.19.323, >= 4.20 < 5.4.285, >= 5.5 < 5.10.227, >= 5.11 < 5.15.168, >= 5.16 < 6.1.113, >= 6.2 < 6.6.55, >= 6.7 < 6.10.14, >= 6.11 < 6.11.3

Fixed versions

4.19.323, 5.4.285, 5.10.227, 5.15.168, 6.1.113, 6.6.55, 6.10.14, 6.11.3

Technical data

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-416