VDB
CVE-2021-20265
CVE-2021-20265
PUBLISHED
Reported by redhat · Published March 10, 2021
A flaw was found in the way memory resources were freed in the unix_stream_recvmsg function in the Linux kernel when a signal was pending. This flaw allows an unprivileged local user to crash the system by exhausting available memory. The highest threat from this vulnerability is to system availability.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| linux-qemu-6.18 | Chainguard | 6.18.10-r0 |
Affected products
| Vendor | Product | Versions |
|---|---|---|
| n/a | kernel | Linux kernel 4.5-rc3 |
| n/a | kernel | 4.5-rc3 |
Timeline
- Mar 10, 2021 CVE Published
- Mar 10, 2021 PoC Published
- Apr 14, 2021 EPSS Score (30 in total, the first dated here)
- Mar 4, 2026 CVE Updated
- Jun 1, 2026 Security Advisory (9 in total, the first dated here)
- Aug 9, 2026 Distribution Patch (8 in total, the first dated here)
- Aug 27, 2026 Coalition ESS Score
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The same record, from the CLI:
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