# CVE-2023-53301: linux: In the Linux kernel, the following vulnerability has been resolved:  f2fs: fix kernel crash due to null io->bio  We s...

CVE-2023-53301 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-53301, released September 16, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-53301
- Priority: High
- CVSS: 7.1 (high)
- EPSS: 0.0015
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 16, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  f2fs: fix kernel crash due to null io->bio  We should return when io->bio is null before doing anything. Otherwise, panic.  BUG: kernel NULL pointer dereference, address: 0000000000000010 RIP: 0010:__submit_merged_write_cond+0x164/0x240 [f2fs] Call Trace:  <TASK>  f2fs_submit_merged_write+0x1d/0x30 [f2fs]  commit_checkpoint+0x110/0x1e0 [f2fs]  f2fs_write_checkpoint+0x9f7/0xf00 [f2fs]  ? __pfx_issue_checkpoint_thread+0x10/0x10 [f2fs]  __checkpoint_and_complete_reqs+0x84/0x190 [f2fs]  ? preempt_count_add+0x82/0xc0  ? __pfx_issue_checkpoint_thread+0x10/0x10 [f2fs]  issue_checkpoint_thread+0x4c/0xf0 [f2fs]  ? __pfx_autoremove_wake_function+0x10/0x10  kthread+0xff/0x130  ? __pfx_kthread+0x10/0x10  ret_from_fork+0x2c/0x50  </TASK>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.20-1 | [DEBIAN-CVE-2023-53301](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53301.md) | Sep 16, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.1.20-1 | [DEBIAN-CVE-2023-53301](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53301.md) | Sep 16, 2025 |
| Linux | linux Debian 14 | 6.1.20-1 | [DEBIAN-CVE-2023-53301](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53301.md) | Sep 16, 2025 |

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