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CVE-2017-18344
The timer_create syscall implementation in kernel/time/posix-timers.c in the Linux kernel before 4.14.8 doesn't properly validate the…
Medium5.5EPSS 3.4%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
The timer_create syscall implementation in kernel/time/posix-timers.c in the Linux kernel before 4.14.8 doesn't properly validate the sigevent->sigev_notify field, which leads to out-of-bounds access in the show_timer function (called when /proc/$PID/timers is read). This allows userspace applications to read arbitrary kernel memory (on a kernel built with CONFIG_POSIX_TIMERS and CONFIG_CHECKPOINT_RESTORE).
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Medium5.5 | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 3.4% · top 11% of all CVEs (3 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
n/a
- affected n/a
References (15)
- RHSA-2018:3540 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2018:3083 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2018:3591 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2018:3459 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- 1041414 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.8 (opens in a new tab)x_refsource_MISCx_transferred
- RHSA-2018:3590 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2018:2948 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- https://github.com/torvalds/linux/commit/cef31d9af908243421258f1df35a4a644604efbe (opens in a new tab)x_refsource_MISCx_transferred
- USN-3742-2 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- 104909 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- USN-3742-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- RHSA-2018:3586 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- 45175 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
- RHSA-2018:3096 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
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)
- 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://trackcve.app/cve/CVE-2017-18344)Record last updated .