CVE-2024-7264: libcurl's ASN1 parser code has the `GTime2str()` function, used for parsing an ASN.1 Generalized Time field

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MEDIUM 6.5UPGRADE

CVE-2024-7264 is a medium-severity flaw (CVSS 6.5) affecting libcurl. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

libcurl's ASN1 parser code has the `GTime2str()` function, used for parsing an ASN.1 Generalized Time field. If given an syntactically incorrect field, the parser might end up using -1 for the length of the *time fraction*, leading to a `strlen()` getting performed on a pointer to a heap buffer area that is not (purposely) null terminated. This flaw most likely leads to a crash, but can also lead to heap contents getting returned to the applicat

Why this priority

EPSS top 3%: very likely to be exploited
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	20.2% (top 3%)
CISA exploited list	No
Weakness	CWE-125
Published	2024-07-31
Last modified	2026-10-15

Publisher (CNA): curl · Vendor: haxx

Last updated 2026-10-15 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-07-31 08:15 UTCPublished CVE record published
2026-10-15 01:19 UTCUpdated Record last modified

haxx libcurl UPGRADE

Affected: >= 7.32.0 and < 8.9.1

Fixed in: 8.9.1

Safe to downgrade to: a release before 7.32.0

1. Check installed version

apt-cache policy libcurl || rpm -q libcurl || libcurl --version

2. UPGRADE to 8.9.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade libcurl

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade libcurl

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 7.32.0 (Debian / Ubuntu)

apt-cache madison libcurl sudo apt install libcurl=<VERSION_BEFORE_7.32.0> sudo apt-mark hold libcurl

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list libcurl sudo dnf downgrade libcurl-<VERSION_BEFORE_7.32.0> sudo dnf versionlock add libcurl

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2024-7264?

libcurl: upgrade to 8.9.1. Exact commands for each OS are on this page.

Is CVE-2024-7264 being exploited?

CVE-2024-7264 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2024-7264 affect?

CVE-2024-7264 affects libcurl. Severity is medium (CVSS 6.5). libcurl's ASN1 parser code has the `GTime2str()` function, used for parsing an ASN.1 Generalized Time field. If given an syntactically incorrect field, the parser might end up using -1 for the length of the *time fraction*, leading to a `st

How urgent is CVE-2024-7264?

Priority 52/100. EPSS top 3%: very likely to be exploited; Public exploit reference

Software pages

curl vulnerabilities

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References

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