CVE-2012-2806: Heap-based buffer overflow in the get_sos function in jdmarker.c in libjpeg-turbo 1.2.0 allows remote attacker

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HIGH 8.8DOWNGRADE

CVE-2012-2806 is a high-severity flaw (CVSS 8.8) affecting libjpeg-turbo. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Heap-based buffer overflow in the get_sos function in jdmarker.c in libjpeg-turbo 1.2.0 allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via a large component count in the header of a JPEG image.

Why this priority

High severity
EPSS top 8%: very likely to be exploited

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

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	4.8% (top 8%)
CISA exploited list	No
Weakness	CWE-787
Published	2012-08-13
Last modified	2026-06-16

Publisher (CNA): Chrome · Vendor: d.r.commander

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2012-08-13 20:55 UTCPublished CVE record published
2026-06-16 23:42 UTCUpdated Record last modified

d.r.commander libjpeg-turbo DOWNGRADE

Affected: 1.2.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.2.0

1. Check installed version

apt-cache policy libjpeg-turbo || rpm -q libjpeg-turbo || libjpeg-turbo --version

2. No fixed release: DOWNGRADE to a release before 1.2.0 (Debian / Ubuntu)

apt-cache madison libjpeg-turbo sudo apt install libjpeg-turbo=<VERSION_BEFORE_1.2.0> sudo apt-mark hold libjpeg-turbo

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

dnf --showduplicates list libjpeg-turbo sudo dnf downgrade libjpeg-turbo-<VERSION_BEFORE_1.2.0> sudo dnf versionlock add libjpeg-turbo

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-2012-2806?

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

Is CVE-2012-2806 being exploited?

CVE-2012-2806 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-2012-2806 affect?

CVE-2012-2806 affects libjpeg-turbo. Severity is high (CVSS 8.8). Heap-based buffer overflow in the get_sos function in jdmarker.c in libjpeg-turbo 1.2.0 allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via a large component count in the header o

How urgent is CVE-2012-2806?

Priority 54/100. High severity; EPSS top 8%: very likely to be exploited

Related CVEs

CVE-2023-2804 MEDIUM 6.5 DOWNGRADE A heap-based buffer overflow issue was discovered in libjpeg-turbo in h2v2_merged_upsample_internal() function
CVE-2021-46822 MEDIUM 5.5 UPGRADE The PPM reader in libjpeg-turbo through 2.0.90 mishandles use of tjLoadImage for loading a 16-bit binary PPM f
CVE-2021-29390 HIGH 7.1 DOWNGRADE MITIGATE libjpeg-turbo version 2.0.90 has a heap-based buffer over-read (2 bytes) in decompress_smooth_data in jdcoefct
CVE-2021-20205 MEDIUM 6.5 DOWNGRADE MITIGATE Libjpeg-turbo versions 2.0.91 and 2.0.90 is vulnerable to a denial of service vulnerability caused by a divide
CVE-2020-35538 MEDIUM 5.5 DOWNGRADE A crafted input file could cause a null pointer dereference in jcopy_sample_rows() when processed by libjpeg-t

References

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