CVE-2022-41715

Memory exhaustion when compiling regular expressions in regexp/syntax

Description

Programs which compile regular expressions from untrusted sources may be vulnerable to memory exhaustion or denial of service. The parsed regexp representation is linear in the size of the input, but in some cases the constant factor can be as high as 40,000, making relatively small regexps consume much larger amounts of memory. After fix, each regexp being parsed is limited to a 256 MB memory footprint. Regular expressions whose representation would use more space than that are rejected. Normal use of regular expressions is unaffected.

7.5

CVSS

Severity: High

CVSS 3.1 •

EPSS 0.02%

Vendor Advisory go.dev

Affected: Go standard library regexp/syntax

References

Link	Tags
https://go.dev/issue/55949	third party advisory issue tracking
https://go.dev/cl/439356	patch
https://groups.google.com/g/golang-announce/c/xtuG5faxtaU	release notes mailing list
https://pkg.go.dev/vuln/GO-2022-1039	vendor advisory
https://security.gentoo.org/glsa/202311-09

Frequently Asked Questions

What is the severity of CVE-2022-41715?: CVE-2022-41715 has been scored as a high severity vulnerability.
How to fix CVE-2022-41715?: To fix CVE-2022-41715, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-41715 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2022-41715 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-41715?: CVE-2022-41715 affects Go standard library regexp/syntax.

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