CVE-2024-41433: PingCAP TiDB v8.1.0 was discovered to contain a buffer overflow via the component expression.ExplainExpression

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2024-41433 is a critical-severity flaw (CVSS 9.8) affecting tidb. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

PingCAP TiDB v8.1.0 was discovered to contain a buffer overflow via the component expression.ExplainExpressionList. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted input. NOTE: PingCAP maintains that the actual reproduction of this issue did not cause the security impact of service interruption to other users. They argue that this is a complex query bug and not a DoS vulnerability.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 53%)
CISA exploited list	No
Weakness	CWE-120
Published	2024-09-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: pingcap

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2024-09-03 21:15 UTCPublished CVE record published
2026-06-17 07:47 UTCUpdated Record last modified

pingcap tidb DOWNGRADE

Affected: 8.1.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 8.1.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 8.1.0 (Debian / Ubuntu)

apt-cache madison tidb sudo apt install tidb=<VERSION_BEFORE_8.1.0> sudo apt-mark hold tidb

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list tidb sudo dnf downgrade tidb-<VERSION_BEFORE_8.1.0> sudo dnf versionlock add tidb

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-2024-41433?

tidb: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-41433 being exploited?

CVE-2024-41433 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-2024-41433 affect?

CVE-2024-41433 affects tidb. Severity is critical (CVSS 9.8). PingCAP TiDB v8.1.0 was discovered to contain a buffer overflow via the component expression.ExplainExpressionList. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted input. NOTE: PingCAP maintains that the

How urgent is CVE-2024-41433?

Priority 56/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2024-41434 MEDIUM 4.3 DOWNGRADE PingCAP TiDB v8.1.0 was discovered to contain a buffer overflow via the component (*Column).GetDecimal
CVE-2024-35618 HIGH 7.5 DOWNGRADE PingCAP TiDB v7.5.1 was discovered to contain a NULL pointer dereference via the component SortedRowContainer.
CVE-2024-33809 MEDIUM 6.5 DOWNGRADE PingCAP TiDB v7.5.1 was discovered to contain a buffer overflow vulnerability, which could lead to database cr

References

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