CVE-2025-21680

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Source
https://cve.org/CVERecord?id=CVE-2025-21680
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-21680.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-21680
Downstream
Related
Published
2025-01-31T11:25:40.831Z
Modified
2026-03-20T12:37:39.300867Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
pktgen: Avoid out-of-bounds access in get_imix_entries
Details

In the Linux kernel, the following vulnerability has been resolved:

pktgen: Avoid out-of-bounds access in getimixentries

Passing a sufficient amount of imix entries leads to invalid access to the pktdev->imixentries array because of the incorrect boundary check.

UBSAN: array-index-out-of-bounds in net/core/pktgen.c:874:24 index 20 is out of range for type 'imixpkt [20]' CPU: 2 PID: 1210 Comm: bash Not tainted 6.10.0-rc1 #121 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996) Call Trace: <TASK> dumpstacklvl lib/dumpstack.c:117 __ubsanhandleoutofbounds lib/ubsan.c:429 getimixentries net/core/pktgen.c:874 pktgenifwrite net/core/pktgen.c:1063 pdewrite fs/proc/inode.c:334 procregwrite fs/proc/inode.c:346 vfswrite fs/readwrite.c:593 ksyswrite fs/readwrite.c:644 dosyscall64 arch/x86/entry/common.c:83 entrySYSCALL64afterhwframe arch/x86/entry/entry64.S:130

Found by Linux Verification Center (linuxtesting.org) with SVACE.

[ fp: allow to fill the array completely; minor changelog cleanup ]

Database specific 
{
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21680.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
52a62f8603f97e720882c8f5aff2767ac6a11d5f
Fixed
3450092cc2d1c311c5ea92a2486daa2a33520ea5
Fixed
e5d24a7074dcd0c7e76b7e7e4efbbe7418d62486
Fixed
7cde21f52042aa2e29a654458166b873d2ae66b3
Fixed
1a9b65c672ca9dc4ba52ca2fd54329db9580ce29
Fixed
76201b5979768500bca362871db66d77cb4c225e

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-21680.json"