CVE-2017-1000112
A public proof of concept exists; no exploitation attested.
- Published2017-10-05
- Fixed in4.12.7 · 4.9.43 · 4.4.82 · 3.18.65 · 3.16.47 · 3.10.108
- WeaknessCWE-362
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
Linux kernel: Exploitable memory corruption due to UFO to non-UFO path switch. When building a UFO packet with MSG_MORE __ip_append_data() calls ip_ufo_append_data() to append. However in between two send() calls, the append path can be switched from UFO to non-UFO one, which leads to a memory corruption. In case UFO packet lengths exceeds MTU, copy = maxfraglen - skb->len becomes negative on the non-UFO path and the branch to allocate new skb is taken. This triggers fragmentation and computation of fraggap = skb_prev->len - maxfraglen. Fraggap can exceed MTU, causing copy = datalen - transhdrlen - fraggap to become negative. Subsequently skb_copy_and_csum_bits() writes out-of-bounds. A similar issue is present in IPv6 code. The bug was introduced in e89e9cf539a2 ("[IPv4/IPv6]: UFO Scatter-gather approach") on Oct 18 2005.
Timeline
dates in UTC- 2017-10-0501:29CVE publishedNVD
- 2026-10-2319:23First public proof of conceptPoC-in-GitHub
- 2026-10-2319:23EPSS crossed 10 %FIRST EPSS
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2017-1000112?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2017-1000112?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 4.x | ≥ 4.10, < 4.12.7 | 4.12.7 | NVD |
| 4.x | ≥ 4.5, < 4.9.43 | 4.9.43 | NVD |
| 4.4 | ≥ 3.19, < 4.4.82 | 4.4.82 | NVD |
| 3.x | ≥ 3.17, < 3.18.65 | 3.18.65 | NVD |
| 3.x | ≥ 3.11, < 3.16.47 | 3.16.47 | NVD |
| 3.10 | ≥ 2.6.15, < 3.10.108 | 3.10.108 | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
- Update Linux linux kernel to 4.12.7 · 4.9.43 · 4.4.82 · 3.18.65 · 3.16.47 · 3.10.108
Advisories and patches
- seclists.orgPatch
Detection
read 2026-10-23 19:23 UTC- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- 5 repositories, unverifiedhikame/docker_escape_pwnol0273st-s/CVE-2017-1000112-AdpatedIT19083124/SNP-AssignmentSpydomain/CVE-2017-1000112-PoCWhatsWrongAndWhy/CVE-2017-1000112 PoC-in-GitHub
Sources
- NVDCVSS 3.17read 2026-10-23
- NVDCVSS 2.06.9read 2026-10-23
- NVDweakness (CWE)CWE-362read 2026-10-23
- FIRST EPSSEPSS score20.8 %read 2026-10-23
- PoC-in-GitHubproof of concept5read 2026-10-23
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- Published
- 2017-10-05
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
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