# CVE-2023-53214: linux: In the Linux kernel, the following vulnerability has been resolved:  f2fs: fix to avoid potential memory corruption i...

CVE-2023-53214 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-53214, released September 15, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-53214
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0018
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 15, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  f2fs: fix to avoid potential memory corruption in __update_iostat_latency()  Add iotype sanity check to avoid potential memory corruption. This is to fix the compile error below:  fs/f2fs/iostat.c:231 __update_iostat_latency() error: buffer overflow 'io_lat->peak_lat[type]' 3 <= 3  vim +228 fs/f2fs/iostat.c    211  static inline void __update_iostat_latency(struct bio_iostat_ctx 	*iostat_ctx,   212					enum iostat_lat_type type)   213  {   214		unsigned long ts_diff;   215		unsigned int page_type = iostat_ctx->type;   216		struct f2fs_sb_info *sbi = iostat_ctx->sbi;   217		struct iostat_lat_info *io_lat = sbi->iostat_io_lat;   218		unsigned long flags;   219   220		if (!sbi->iostat_enable)   221			return;   222   223		ts_diff = jiffies - iostat_ctx->submit_ts;   224		if (page_type >= META_FLUSH)                                  ^^^^^^^^^^    225			page_type = META;   226   227		spin_lock_irqsave(&sbi->iostat_lat_lock, flags);  @228		io_lat->sum_lat[type][page_type] += ts_diff;                                       ^^^^^^^^^ Mixup between META_FLUSH and NR_PAGE_TYPE leads to memory corruption.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.20-1 | [DEBIAN-CVE-2023-53214](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53214.md) | Sep 15, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.1.20-1 | [DEBIAN-CVE-2023-53214](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53214.md) | Sep 15, 2025 |
| Linux | linux Debian 14 | 6.1.20-1 | [DEBIAN-CVE-2023-53214](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53214.md) | Sep 15, 2025 |

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