Vulnerability details
CVE-2023-53111
loop: Fix use-after-free issues
Official description
In the Linux kernel, the following vulnerability has been resolved: loop: Fix use-after-free issues do_req_filebacked() calls blk_mq_complete_request() synchronously or asynchronously when using asynchronous I/O unless memory allocation fails. Hence, modify loop_handle_cmd() such that it does not dereference 'cmd' nor 'rq' after do_req_filebacked() finished unless we are sure that the request has not yet been completed. This patch fixes the following kernel crash: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000054 Call trace: css_put.42938+0x1c/0x1ac loop_process_work+0xc8c/0xfd4 loop_rootcg_workfn+0x24/0x34 process_one_work+0x244/0x558 worker_thread+0x400/0x8fc kthread+0x16c/0x1e0 ret_from_fork+0x10/0x20
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.8High | 3.1 | CVEProject cvelistV5 (CNA) (Linux) | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Linux | Linux | 4.4 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | bc07c10a3603a5ab3ef01ba42b3d41f9ac63d1b6 ≤ v < 81bf9d78fa246a166619196ff5005430ed2bc7c2 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | bc07c10a3603a5ab3ef01ba42b3d41f9ac63d1b6 ≤ v < 407badf73ec9fb0d5744bf2ca1745c1818aa222f | CVEProject cvelistV5 (CNA) |
| Linux | Linux | bc07c10a3603a5ab3ef01ba42b3d41f9ac63d1b6 ≤ v < e3fda704903f6d1fc351412f1bc6620333959ada | CVEProject cvelistV5 (CNA) |
| Linux | Linux | bc07c10a3603a5ab3ef01ba42b3d41f9ac63d1b6 ≤ v < 6917395c4667cfb607ed8bf1826205a59414657c | CVEProject cvelistV5 (CNA) |
| Linux | Linux | bc07c10a3603a5ab3ef01ba42b3d41f9ac63d1b6 ≤ v < 9b0cb770f5d7b1ff40bea7ca385438ee94570eec | CVEProject cvelistV5 (CNA) |
References and advisories
5- https://git.kernel.org/stable/c/81bf9d78fa246a166619196ff5005430ed2bc7c2
- https://git.kernel.org/stable/c/407badf73ec9fb0d5744bf2ca1745c1818aa222f
- https://git.kernel.org/stable/c/e3fda704903f6d1fc351412f1bc6620333959ada
- https://git.kernel.org/stable/c/6917395c4667cfb607ed8bf1826205a59414657c
- https://git.kernel.org/stable/c/9b0cb770f5d7b1ff40bea7ca385438ee94570eec
Details
- Published
- 2025-05-02
- Last updated
- 2026-10-30
- State
- Published
- Assigner (CNA)
- Linux
Exploit prediction (EPSS)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- —