CVE-2017-16995
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.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 30.1%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 30.05% probability · 98th percentile
- Public exploits
- 3 in Exploit-DB · verified · first 16 March 2018
- CISA KEV
- Not listed
- Weakness
- CWE-119
- Affected
- linux/linux kernel · debian/debian linux · canonical/ubuntu linux
- Source
- security@debian.org
EPSS 30.1% since 27 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (3)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
| EDB-ID | Title | Type | Published | Verified |
|---|---|---|---|---|
| EDB-45058source ↗ | Linux - BPF Sign Extension Local Privilege Escalation (Metasploit)linux · Metasploit | local | 19 July 2018 | yes |
| EDB-45010source ↗ | Linux Kernel < 4.13.9 (Ubuntu 16.04 / Fedora 27) - Local Privilege Escalationlinux · rlarabee | local | 10 July 2018 | yes |
| EDB-44298source ↗ | Linux Kernel < 4.4.0-116 (Ubuntu 16.04.4) - Local Privilege Escalationlinux · Bruce Leidl | local | 16 March 2018 | no |
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=95a762e2c8c942780948091f8f2a4f32fce1ac6fVendor Advisory
- http://openwall.com/lists/oss-security/2017/12/21/2Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/102288Third Party Advisory, VDB Entry
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1454Third Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=a6132276ab5dcc38b3299082efeb25b948263adbVendor Advisory
- https://github.com/torvalds/linux/commit/95a762e2c8c942780948091f8f2a4f32fce1ac6fThird Party Advisory
- https://usn.ubuntu.com/3619-1/Third Party Advisory
- https://usn.ubuntu.com/3619-2/Third Party Advisory
- https://usn.ubuntu.com/3633-1/Third Party Advisory
- https://usn.ubuntu.com/usn/usn-3523-2/Third Party Advisory
- https://www.debian.org/security/2017/dsa-4073Third Party Advisory
- https://www.exploit-db.com/exploits/44298/Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/45010/Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/45058/Third Party Advisory, VDB Entry
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=95a762e2c8c942780948091f8f2a4f32fce1ac6fVendor Advisory
- http://openwall.com/lists/oss-security/2017/12/21/2Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/102288Third Party Advisory, VDB Entry
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1454Third Party Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=a6132276ab5dcc38b3299082efeb25b948263adbVendor Advisory
- https://github.com/torvalds/linux/commit/95a762e2c8c942780948091f8f2a4f32fce1ac6fThird Party Advisory
- https://usn.ubuntu.com/3619-1/Third Party Advisory
- https://usn.ubuntu.com/3619-2/Third Party Advisory
- https://usn.ubuntu.com/3633-1/Third Party Advisory
- https://usn.ubuntu.com/usn/usn-3523-2/Third Party Advisory
- https://www.debian.org/security/2017/dsa-4073Third Party Advisory
- https://www.exploit-db.com/exploits/44298/Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/45010/Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/45058/Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.