CVE-2025-21748: linux Integer Overflow or Wraparound
CVSS: 9.8v3.1CriticalModified
AliasesUBUNTU-CVE-2025-21748DEBIAN-CVE-2025-21748
Published 27-02-2025Last modified 05-08-2026
Vulnerability summary
CVE-2025-21748 is a critical (CVSS 9.8) Integer Overflow or Wraparound vulnerability in linux. EPSS estimates a 0.61% chance of exploitation in the next 30 days, higher than 47.9% of scored vulnerabilities.
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)EPSS score
0.61%
0%100%
Low · +0.01 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 26 · Related 26Timeline
- 27-02-2025PublishedVulnerability first disclosed.
- 05-08-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix integer overflows on 32 bit systems On 32bit systems the addition operations in ipc_msg_alloc() can potentially overflow leading to memory corruption. Add bounds checking using KSMBD_IPC_MAX_PAYLOAD to avoid overflow.
CVSS metrics
4 scores · 4 sources · 1 versionCritical 9.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSources4 sources · 5.5–9.8
- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HDiffers
- NVDNIST5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HDiffers
EPSS trend
Probability
0.61%
Chance of exploitation in the next 30 days
Percentile
48%
Versus all other CVEs
30-day change
+0.01 pp
From 0.59% on 19-09-2026
19-09-202619-10-2026
EPSS score0.61%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu124 products
- linux< 5.15.0-140.150 | < 6.8.0-64.67
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 5.15.0-1084.91 | < 6.8.0-1032.34
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < f3b9fb2764591d792d160f375851013665a9e820 | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 760568c1f62ea874e8fb492f9cfa4f47b4b8391e | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < 82f59d64e6297f270311b16b5dcf65be406d1ea3 | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < b4b902737746c490258de5cb55cab39e79927a67 | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < ecb9947fa7c99a77b04d43404c6988a0d326e4a0 | ≥ 0626e6641f6b467447c81dd7678a69c66f7746cf, < aab98e2dbd648510f8f51b83fbf4721206ccae45 | 5.15
- linux_kernel≥ 5.15, < 6.1.129 | ≥ 6.2, < 6.6.78 | ≥ 6.7, < 6.12.14 | ≥ 6.13, < 6.13.3
Debian1 product
- linux< 6.1.129-1 | < 6.12.15-1
3 vendors · 127 products
