How severe is CVE-2021-29390?

CVE-2021-29390 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability high.

Is CVE-2021-29390 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-29390?

CVE-2021-29390 primarily affects Libjpeg-turbo. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-29390?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-29390 published?

CVE-2021-29390 was published on 2023-08-22 and last updated on 2026-06-17.

CVE-2021-29390

CVE-2021-29390 is a high-severity vulnerability in Libjpeg-turbo with a CVSS 3.x base score of 7.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.

Key facts

Severity: High (CVSS 3.x base score 7.1)
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Libjpeg-turbo
Published: 2023-08-22
Last modified: 2026-06-17

Description

libjpeg-turbo version 2.0.90 has a heap-based buffer over-read (2 bytes) in decompress_smooth_data in jdcoefct.c.

Frequently asked questions

What is CVE-2021-29390?: libjpeg-turbo version 2.0.90 has a heap-based buffer over-read (2 bytes) in decompress_smooth_data in jdcoefct.c.
How severe is CVE-2021-29390?: CVE-2021-29390 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity none, and availability high.
Is CVE-2021-29390 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-29390?: CVE-2021-29390 primarily affects Libjpeg-turbo. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-29390?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-29390 published?: CVE-2021-29390 was published on 2023-08-22 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:a:libjpeg-turbo:libjpeg-turbo:2.0.90:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*

More vulnerabilities in Libjpeg-turbo

CVE-2020-17541 — High (CVSS 8.8): Libjpeg-turbo all version have a stack-based buffer overflow in the "transform" component. A remote attacker can send a…
CVE-2018-20330 — High (CVSS 8.8): The tjLoadImage function in libjpeg-turbo 2.0.1 has an integer overflow with a resultant heap-based buffer overflow via…
CVE-2016-3616 — High (CVSS 8.8): The cjpeg utility in libjpeg allows remote attackers to cause a denial of service (NULL pointer dereference and…
CVE-2020-13790 — High (CVSS 8.1): libjpeg-turbo 2.0.4, and mozjpeg 4.0.0, has a heap-based buffer over-read in get_rgb_row() in rdppm.c via a malformed…
CVE-2023-2804 — Medium (CVSS 6.5): A heap-based buffer overflow issue was discovered in libjpeg-turbo in h2v2_merged_upsample_internal() function of…
CVE-2021-20205 — Medium (CVSS 6.5): Libjpeg-turbo versions 2.0.91 and 2.0.90 is vulnerable to a denial of service vulnerability caused by a divide by zero…

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