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CVE-2018-20854: Linux kernel may read beyond memory, causing crash
CVE-2018-20854 · published 7 years ago
Summary
Versions of the Linux kernel older than 4.20 contain a coding mistake that can cause the system to read data from the wrong place in memory. This could lead to unexpected behavior, system freezes, or crashes. Upgrade to a kernel version newer than 4.20 or apply the provided patches to correct the error.
What to do
- Update linux linux_kernel to version 4.20 or later.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| linux | linux_kernel |
< 4.20 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
Original advisory text
An issue was discovered in the Linux kernel before 4.20. drivers/phy/mscc/phy-ocelot-serdes.c has an off-by-one error with a resultant ctrl->phys out-of-bounds read.
An issue was discovered in the Linux kernel before 4.20. drivers/phy/mscc/phy-ocelot-serdes.c has an off-by-one error with a resultant ctrl->phys out-of-bounds read.
References
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6acb4... Mailing List Patch Vendor Advisory
- https://github.com/torvalds/linux/commit/6acb47d1a318e5b3b7115354ebc4ea060c59d3a... Patch Third Party Advisory
- https://security.netapp.com/advisory/ntap-20190905-0002/
- https://support.f5.com/csp/article/K32450233
- https://support.f5.com/csp/article/K32450233?utm_source=f5support&%3Butm_medi...
Internet-facing
14 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit (estimated)
- Gives an attacker full control (estimated)
Type
CWE-125Out-of-bounds Read
Timeline
Published26 Jul 2019
Updated4 Nov 2026
First seen29 Sep 2026
Sources
CVE-2018-20854 · NVD
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