CVE-2018-18559
High
Description
In the Linux kernel through 4.19, a use-after-free can occur due to a race condition between fanout_add from setsockopt and bind on an AF_PACKET socket. This issue exists because of the 15fe076edea787807a7cdc168df832544b58eba6 incomplete fix for a race condition. The code mishandles a certain multithreaded case involving a packet_do_bind unregister action followed by a packet_notifier register action. Later, packet_release operates on only one of the two applicable linked lists. The attacker can achieve Program Counter control.
SeverityHigh
CVSS8.1
Exploit probability—
Product
Linux Kernel
PublishedOct 22, 2018
First seenOct 22, 2018
How to fix
Update
- linux linux_kernel3.2.100, 3.15, 3.18.88, 4.1.49, 4.3, 4.4.106, 4.9.70, 4.14.7 or later
Vendor advisories
- access.redhat.com/errata/RHSA-2019:0188
- access.redhat.com/errata/RHSA-2019:0163
- access.redhat.com/errata/RHBA-2019:0327
- access.redhat.com/errata/RHSA-2019:1170
- access.redhat.com/errata/RHSA-2019:1190
- access.redhat.com/errata/RHSA-2019:3967
- access.redhat.com/errata/RHSA-2019:4159
- access.redhat.com/errata/RHSA-2020:0174
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 3.2.95 ≤ v < 3.2.100, 3.14.58 ≤ v < 3.15, 3.18.25 ≤ v < 3.18.88, 4.1.14 ≤ v < 4.1.49, 4.2.7 ≤ v < 4.3, 4.3.1 ≤ v < 4.4.106, 4.5 ≤ v < 4.9.70, 4.10 ≤ v < 4.14.7 | 3.2.100, 3.15, 3.18.88, 4.1.49, 4.3, 4.4.106, 4.9.70, 4.14.7 |
| redhat openshift_container_platform | 3.11 | — |
| redhat virtualization_host | 4.0 | — |
| redhat enterprise_linux_desktop | 7.0 | — |
| redhat enterprise_linux_server | 7.0 | — |
| redhat enterprise_linux_server_aus | 7.6 | — |
| redhat enterprise_linux_server_eus | 7.6 | — |
| redhat enterprise_linux_server_tus | 7.6 | — |
| redhat enterprise_linux_workstation | 7.0 | — |
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