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CVE-2018-20836
An issue was discovered in the Linux kernel before 4.20. There is a race condition in smp_task_timedout() and smp_task_done() in…
- 8.1HighCVSS base score
- 5.1%Exploitation in 30 daysEPSS · top 7.5% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
An issue was discovered in the Linux kernel before 4.20. There is a race condition in smp_task_timedout() and smp_task_done() in drivers/scsi/libsas/sas_expander.c, leading to a use-after-free.
Timeline
ID reserved
By mitre
Published
- 5 years later
· 5 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | High8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 5.1% · top 7.5% of all CVEs (11 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.1.
Affected products
n/a
- affected n/a
References
14
- https://github.com/torvalds/linux/commit/b90cd6f2b905905fb42671009dc0e27c310a16ae (opens in a new tab)x_refsource_MISCx_transferred
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b90cd6f2b905905fb42671009dc0e27c310a16ae (opens in a new tab)x_refsource_MISCx_transferred
- 108196 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- https://support.f5.com/csp/article/K11225249 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://security.netapp.com/advisory/ntap-20190719-0003/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- openSUSE-SU-2019:1716 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- openSUSE-SU-2019:1757 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- USN-4076-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- DSA-4495 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- 20190812 [SECURITY] [DSA 4495-1] linux security update (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 20190813 [SECURITY] [DSA 4497-1] linux security update (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- DSA-4497 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- [debian-lts-announce] 20190814 [SECURITY] [DLA 1884-1] linux security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [debian-lts-announce] 20190814 [SECURITY] [DLA 1885-1] linux-4.9 security update (opens in a new tab)mailing-listx_refsource_MLISTx_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)
- EUVD EUVD-2018-13376 (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://cveledger.app/cve/CVE-2018-20836)Record last updated .