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.
CVSS Details
- CVSS 3.1 Base Score: 7
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Sep 17, 2025 | Sep 17, 2025 |
| Ubuntu | — | Upgrade linux-gkeopUpgrade linuxUpgrade linux-oracle-5.15Upgrade linux-nvidia-tegra-5.15Upgrade linux-nvidia-tegra-igxUpgrade linux-hwe-5.15Upgrade linux-azure-5.15Upgrade linux-raspiUpgrade linux-nvidia-tegraUpgrade linux-lowlatencyUpgrade linux-awsUpgrade linux-gcp-5.15Upgrade linux-riscv-5.15Upgrade linux-intel-iotgUpgrade linux-ibmUpgrade linux-kvmUpgrade linux-gcpUpgrade linux-gkeUpgrade linux-oracleUpgrade linux-bluefieldUpgrade linux-xilinx-zynqmpUpgrade linux-intel-iotg-5.15Upgrade linux-azureUpgrade linux-lowlatency-hwe-5.15Upgrade linux-nvidiaUpgrade linux-intel-iot-realtimeUpgrade linux-aws-5.15Upgrade linux-ibm-5.15Upgrade linux-realtime | Sep 19, 2025 | Sep 16, 2025 |
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