CVE-2017-1000112

Exp

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.

Published: 2017-10-05 Last update: 2026-05-13 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2017-1000112 is rated High Exploit Risk (72/100): CVSS High severity, with high exploitation likelihood (EPSS 20.80%, 97th percentile). 3 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2017-1000112

EDB-ID Source Kind Published Link
47169 exploit_db edb 2018-12-29 Exploit-DB ↗
45147 exploit_db edb 2018-08-03 Exploit-DB ↗
43418 exploit_db edb 2017-08-13 Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2017-1000112

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 82.86% 20.80% -62.06%
2 2026-05-03 84.09% 82.86% -1.23%
3 2026-04-17 — 84.09% —

Full EPSS history (35 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2017-1000112

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.0 3.1 HIGH
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.0 5.9 [email protected]
6.9 2.0 MEDIUM
AV:L/AC:M/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.4 10.0 [email protected]

Weakness enumeration for CVE-2017-1000112

OS Trackers for CVE-2017-1000112

vendor priority summary link
debian low CVE-2017-1000112 low priority: Debian including 1 source packages (linux), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2017-1000112
redhat high — https://access.redhat.com/security/cve/CVE-2017-1000112
suse high CVE-2017-1000112 severity important: SUSE including 224 source package names (cluster-md-kmp-default-4.4.74-92.35.1, cluster-md-kmp-default-4.4.82-6.3.1, …), 361 product×package rows across 34 product lines (SUSE Liberty Linux 7, SUSE Linux Enterprise Desktop 12 SP2, … (34 product lines)): Fixed 355, Known Not Affected 6. https://www.suse.com/security/cve/CVE-2017-1000112/
ubuntu high CVE-2017-1000112 high priority: Ubuntu including 79 source packages (linux, linux-aws, …), 654 status rows across 11 suites (artful, bionic, cosmic, focal, jammy, noble, oracular, trusty, upstream, xenial, zesty): DNE 425, not-affected 128, released 92, ignored 9. https://ubuntu.com/security/CVE-2017-1000112

Affected software / configurations for CVE-2017-1000112

Vendor Product Version Raw CPE
linux linux_kernel >= 2.6.15, < 3.10.108 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 3.11, < 3.16.47 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 3.17, < 3.18.65 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 3.19, < 4.4.82 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 4.5, < 4.9.43 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 4.10, < 4.12.7 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

References for CVE-2017-1000112

URL Tags
http://seclists.org/oss-sec/2017/q3/277 Mailing List Patch Third Party Advisory
http://www.debian.org/security/2017/dsa-3981 Third Party Advisory
http://www.securityfocus.com/bid/100262 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1039162 Third Party Advisory VDB Entry
https://access.redhat.com/errata/RHSA-2017:2918 Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:2930 Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:2931 Third Party Advisory
https://access.redhat.com/errata/RHSA-2017:3200 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:1931 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:1932 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:4159 Third Party Advisory
https://github.com/xairy/kernel-exploits/tree/master/CVE-2017-1000112 Third Party Advisory
https://www.exploit-db.com/exploits/45147/ Third Party Advisory VDB Entry
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