CVE-2017-16995 EXPLOIT
7.8
HIGH · CVSS 3.1 · EPSS 30.1% (pctl 98)
Patch early
A public exploit exists.
Description
The check_alu_op function in kernel/bpf/verifier.c in the Linux kernel through 4.4 allows local users to cause a denial of service (memory corruption) or possibly have unspecified other impact by leveraging incorrect sign extension.
Scoring
| CVSS | 7.8 (HIGH, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 30.05% — more likely to be exploited than 98% of all CVEs |
| Weakness | CWE-119 |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2017-12-27 |
| Last modified | 2026-06-17 |
Affected (3)
| Vendor | Product |
|---|---|
| canonical | ubuntu linux |
| debian | debian linux |
| linux | linux kernel |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | Linux - BPF Sign Extension Local Privilege Escalation (Metasploit) | 2018-07-19 |
| exploit-db | Linux Kernel < 4.13.9 (Ubuntu 16.04 / Fedora 27) - Local Privilege Escalation | 2018-07-10 |
| exploit-db | Linux Kernel < 4.4.0-116 (Ubuntu 16.04.4) - Local Privilege Escalation | 2018-03-16 |
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=95a762e2c8c942780948091f8f2a4f32fce1ac6f
- http://openwall.com/lists/oss-security/2017/12/21/2
- http://www.securityfocus.com/bid/102288
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1454
- https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=a6132276ab5dcc38b3299082efeb25b948263adb
- https://github.com/torvalds/linux/commit/95a762e2c8c942780948091f8f2a4f32fce1ac6f
- https://usn.ubuntu.com/3619-1/
- https://usn.ubuntu.com/3619-2/
- https://usn.ubuntu.com/3633-1/
- https://usn.ubuntu.com/usn/usn-3523-2/
- https://www.debian.org/security/2017/dsa-4073
- https://www.exploit-db.com/exploits/44298/
- https://www.exploit-db.com/exploits/45010/
- https://www.exploit-db.com/exploits/45058/
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=95a762e2c8c942780948091f8f2a4f32fce1ac6f
- http://openwall.com/lists/oss-security/2017/12/21/2
- http://www.securityfocus.com/bid/102288
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1454
- https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=a6132276ab5dcc38b3299082efeb25b948263adb
- https://github.com/torvalds/linux/commit/95a762e2c8c942780948091f8f2a4f32fce1ac6f
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