CVE-2022-49152
Linux XArray Null Pointer Dereference Vulnerability
Description
In the Linux kernel, the following vulnerability has been resolved: XArray: Fix xas_create_range() when multi-order entry present If there is already an entry present that is of order >= XA_CHUNK_SHIFT when we call xas_create_range(), xas_create_range() will misinterpret that entry as a node and dereference xa_node->parent, generally leading to a crash that looks something like this: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 PID: 32 Comm: khugepaged Not tainted 5.17.0-rc8-syzkaller-00003-g56e337f2cf13 #0 RIP: 0010:xa_parent_locked include/linux/xarray.h:1207 [inline] RIP: 0010:xas_create_range+0x2d9/0x6e0 lib/xarray.c:725 It's deterministically reproducable once you know what the problem is, but producing it in a live kernel requires khugepaged to hit a race. While the problem has been present since xas_create_range() was introduced, I'm not aware of a way to hit it before the page cache was converted to use multi-index entries.
INFO
Published Date :
Feb. 26, 2025, 7 a.m.
Last Modified :
March 13, 2025, 9:58 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.0
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2022-49152.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2022-49152 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2022-49152 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Mar. 13, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-476 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 from (excluding) 5.15.33 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.17 from (excluding) 5.17.2 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 from (excluding) 5.10.110 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 from (excluding) 5.16.19 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (excluding) 5.4.189 Added Reference Type kernel.org: https://git.kernel.org/stable/c/18f13edf3424b3b61814b69d5269b2e14584800c Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/1ac49c8fd49fdf53d3cd8b77eb8ffda08d7fbe22 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/29968329b926d238e3107ec071a250397555d264 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/3e2852eda19ee1a400cd809d7a9322680f34a262 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/3e3c658055c002900982513e289398a1aad4a488 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/7521a97b1929042604bef6859f62fa8b4bbc077b Types: Patch -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Feb. 26, 2025
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: XArray: Fix xas_create_range() when multi-order entry present If there is already an entry present that is of order >= XA_CHUNK_SHIFT when we call xas_create_range(), xas_create_range() will misinterpret that entry as a node and dereference xa_node->parent, generally leading to a crash that looks something like this: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 PID: 32 Comm: khugepaged Not tainted 5.17.0-rc8-syzkaller-00003-g56e337f2cf13 #0 RIP: 0010:xa_parent_locked include/linux/xarray.h:1207 [inline] RIP: 0010:xas_create_range+0x2d9/0x6e0 lib/xarray.c:725 It's deterministically reproducable once you know what the problem is, but producing it in a live kernel requires khugepaged to hit a race. While the problem has been present since xas_create_range() was introduced, I'm not aware of a way to hit it before the page cache was converted to use multi-index entries. Added Reference https://git.kernel.org/stable/c/18f13edf3424b3b61814b69d5269b2e14584800c Added Reference https://git.kernel.org/stable/c/1ac49c8fd49fdf53d3cd8b77eb8ffda08d7fbe22 Added Reference https://git.kernel.org/stable/c/29968329b926d238e3107ec071a250397555d264 Added Reference https://git.kernel.org/stable/c/3e2852eda19ee1a400cd809d7a9322680f34a262 Added Reference https://git.kernel.org/stable/c/3e3c658055c002900982513e289398a1aad4a488 Added Reference https://git.kernel.org/stable/c/7521a97b1929042604bef6859f62fa8b4bbc077b
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2022-49152 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2022-49152
weaknesses.