CVE-2022-34998: JPEGDEC commit be4843c was discovered to contain a global buffer overflow via JPEGDecodeMCU at /src/jpeg.inl.

Routine

HIGH 7.8DOWNGRADE

CVE-2022-34998 is a high-severity flaw (CVSS 7.8) affecting jpegdec. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

JPEGDEC commit be4843c was discovered to contain a global buffer overflow via JPEGDecodeMCU at /src/jpeg.inl.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 73%)
CISA exploited list	No
Weakness	CWE-120
Published	2022-08-16
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: bitbanksoftware

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

Am I affected?

Timeline

2022-08-16 21:15 UTCPublished CVE record published
2026-06-17 04:51 UTCUpdated Record last modified

bitbanksoftware jpegdec DOWNGRADE

Affected: 1.2.7

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.2.7

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.2.7 (Debian / Ubuntu)

apt-cache madison jpegdec sudo apt install jpegdec=<VERSION_BEFORE_1.2.7> sudo apt-mark hold jpegdec

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

dnf --showduplicates list jpegdec sudo dnf downgrade jpegdec-<VERSION_BEFORE_1.2.7> sudo dnf versionlock add jpegdec

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-2022-34998?

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

Is CVE-2022-34998 being exploited?

CVE-2022-34998 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-2022-34998 affect?

CVE-2022-34998 affects jpegdec. Severity is high (CVSS 7.8). JPEGDEC commit be4843c was discovered to contain a global buffer overflow via JPEGDecodeMCU at /src/jpeg.inl.

How urgent is CVE-2022-34998?

Priority 39/100. High severity; Public exploit reference

Related CVEs

CVE-2022-35004 MEDIUM 5.5 DOWNGRADE JPEGDEC commit be4843c was discovered to contain a FPE via TIFFSHORT at /src/jpeg.inl.
CVE-2022-35003 HIGH 7.8 DOWNGRADE JPEGDEC commit be4843c was discovered to contain a global buffer overflow via ucDitherBuffer at /src/jpeg.inl.
CVE-2022-35002 MEDIUM 5.5 DOWNGRADE JPEGDEC commit be4843c was discovered to contain a segmentation fault via TIFFSHORT at /src/jpeg.inl.
CVE-2022-35000 MEDIUM 5.5 DOWNGRADE JPEGDEC commit be4843c was discovered to contain a segmentation fault via fseek at /libio/fseek.c.
CVE-2022-34999 MEDIUM 5.5 DOWNGRADE JPEGDEC commit be4843c was discovered to contain a FPE via DecodeJPEG at /src/jpeg.inl.

References

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