CVE-2025-38652: debian debian_linux Out-of-bounds Read
Vulnerability summary
CVE-2025-38652 is a high (CVSS 7.3) Out-of-bounds Read vulnerability in debian debian_linux. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 6.5% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 35 · Related 31Timeline
- 22-08-2025PublishedVulnerability first disclosed.
- 05-08-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid out-of-boundary access in devs.path - touch /mnt/f2fs/012345678901234567890123456789012345678901234567890123 - truncate -s $((1024*1024*1024)) \ /mnt/f2fs/012345678901234567890123456789012345678901234567890123 - touch /mnt/f2fs/file - truncate -s $((1024*1024*1024)) /mnt/f2fs/file - mkfs.f2fs /mnt/f2fs/012345678901234567890123456789012345678901234567890123 \ -c /mnt/f2fs/file - mount /mnt/f2fs/012345678901234567890123456789012345678901234567890123 \ /mnt/f2fs/loop [16937.192225] F2FS-fs (loop0): Mount Device [ 0]: /mnt/f2fs/012345678901234567890123456789012345678901234567890123\xff\x01, 511, 0 - 3ffff [16937.192268] F2FS-fs (loop0): Failed to find devices If device path length equals to MAX_PATH_LEN, sbi->devs.path[] may not end up w/ null character due to path array is fully filled, So accidently, fields locate after path[] may be treated as part of device path, result in parsing wrong device path. struct f2fs_dev_info { ... char path[MAX_PATH_LEN]; ... }; Let's add one byte space for sbi->devs.path[] to store null character of device path string.
CVSS metrics
4 scores · 4 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated7.3HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:H
- OSV · DebianEcosystem advisory · calculated7.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:HDiffers
- NVDNIST7.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:HDiffers
EPSS trend
Probability
0.18%
Chance of exploitation in the next 30 days
Percentile
7%
Versus all other CVEs
30-day change
0.00 pp
From 0.18% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu146 products
- linuxAll versions (No fix recorded) | < 5.15.0-163.173 | < 6.8.0-100.100
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 5.15.0-1097.104 | < 6.8.0-1046.49
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Debian2 products
- linux< 6.1.148-1 | < 6.12.43-1 | < 6.16.3-1
- debian_linuxEOL11.0
Linux2 products
- linux≥ 3c62be17d4f562f43fe1d03b48194399caa35aa5, < dc0172c74bd9edaee7bea2ebb35f3dbd37a8ae80 | ≥ 3c62be17d4f562f43fe1d03b48194399caa35aa5, < 1cf1ff15f262e8baf12201b270b6a79f9d119b2d | ≥ 3c62be17d4f562f43fe1d03b48194399caa35aa5, < 666b7cf6ac9aa074b8319a2b68cba7f2c30023f0 | ≥ 3c62be17d4f562f43fe1d03b48194399caa35aa5, < 3466721f06edff834f99d9f49f23eabc6b2cb78e | ≥ 3c62be17d4f562f43fe1d03b48194399caa35aa5, < 345fc8d1838f3f8be7c8ed08d86a13dedef67136 | ≥ 3c62be17d4f562f43fe1d03b48194399caa35aa5, < 70849d33130a2cf1d6010069ed200669c8651fbd | ≥ 3c62be17d4f562f43fe1d03b48194399caa35aa5, < 755427093e4294ac111c3f9e40d53f681a0fbdaa | ≥ 3c62be17d4f562f43fe1d03b48194399caa35aa5, < 1b1efa5f0e878745e94a98022e8edc675a87d78e | ≥ 3c62be17d4f562f43fe1d03b48194399caa35aa5, < 5661998536af52848cc4d52a377e90368196edea | 4.10
- linux_kernel≥ 4.10, < 5.4.297 | ≥ 5.5, < 5.10.241 | ≥ 5.11, < 5.15.190 | ≥ 5.16, < 6.1.148 | ≥ 6.2, < 6.6.102 | ≥ 6.7, < 6.12.42 | ≥ 6.13, < 6.15.10 | ≥ 6.16, < 6.16.1
Opensuse1 product
- kernel-source&distro=openSUSE Tumbleweed< 6.16.5-1.1
4 vendors · 151 products
References
48 links
lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlThird Party Advisory
Show all 48 references
- lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlThird Party Advisory
