CVE-2025-21680pktgen: Avoid out-of-bounds access in get_imix_entries
- 7.8HighCVSS base score
- 0.23%Exploitation in 30 daysEPSS · top 87% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: pktgen: Avoid out-of-bounds access in get_imix_entries Passing a sufficient amount of imix entries leads to invalid access to the pkt_dev->imix_entries 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 'imix_pkt [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> dump_stack_lvl lib/dump_stack.c:117 __ubsan_handle_out_of_bounds lib/ubsan.c:429 get_imix_entries net/core/pktgen.c:874 pktgen_if_write net/core/pktgen.c:1063 pde_write fs/proc/inode.c:334 proc_reg_write fs/proc/inode.c:346 vfs_write fs/read_write.c:593 ksys_write fs/read_write.c:644 do_syscall_64 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe arch/x86/entry/entry_64.S:130 Found by Linux Verification Center (linuxtesting.org) with SVACE. [ fp: allow to fill the array completely; minor changelog cleanup ]
Timeline
ID reserved
By Linux
- 33 days later
· 33 days later
Published
- 18 months later
· 18 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| CISA-ADPADP (enrichment) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.23% · top 87% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 52a62f8603f97e720882c8f5aff2767ac6a11d5f – < 3450092cc2d1c311c5ea92a2486daa2a33520ea5
- affected 52a62f8603f97e720882c8f5aff2767ac6a11d5f – < e5d24a7074dcd0c7e76b7e7e4efbbe7418d62486
- affected 52a62f8603f97e720882c8f5aff2767ac6a11d5f – < 7cde21f52042aa2e29a654458166b873d2ae66b3
- affected 52a62f8603f97e720882c8f5aff2767ac6a11d5f – < 1a9b65c672ca9dc4ba52ca2fd54329db9580ce29
- affected 52a62f8603f97e720882c8f5aff2767ac6a11d5f – < 76201b5979768500bca362871db66d77cb4c225e
- affected 5.15
- unaffected < 5.15
- unaffected 5.15.177 – ≤ 5.15.*
- unaffected 6.1.127 – ≤ 6.1.*
- unaffected 6.6.74 – ≤ 6.6.*
- unaffected 6.12.11 – ≤ 6.12.*
- unaffected 6.13 – ≤ *
References
References6
- https://git.kernel.org/stable/c/3450092cc2d1c311c5ea92a2486daa2a33520ea5 (opens in a new tab)
- https://git.kernel.org/stable/c/e5d24a7074dcd0c7e76b7e7e4efbbe7418d62486 (opens in a new tab)
- https://git.kernel.org/stable/c/7cde21f52042aa2e29a654458166b873d2ae66b3 (opens in a new tab)
- https://git.kernel.org/stable/c/1a9b65c672ca9dc4ba52ca2fd54329db9580ce29 (opens in a new tab)
- https://git.kernel.org/stable/c/76201b5979768500bca362871db66d77cb4c225e (opens in a new tab)
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2025-2629 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2025-21680)Record last updated .