CVE-2020-36426
published 2021-07-19CVE-2020-36426: An issue was discovered in Arm Mbed TLS before 2.24.0. mbedtls_x509_crl_parse_der has a buffer over-read (of one byte).
PriorityP336high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
1.69%
74.2th percentile
An issue was discovered in Arm Mbed TLS before 2.24.0. mbedtls_x509_crl_parse_der has a buffer over-read (of one byte).
Affected
10 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| arm | mbed_tls | < 2.7.17 | 2.7.17 |
| arm | mbed_tls | >= 2.17.0 < 2.24.0 | 2.24.0 |
| arm | mbed_tls | >= 2.8.0 < 2.16.8 | 2.16.8 |
| debian | debian_linux | — | — |
| debian | mbedtls | < mbedtls 2.16.9-0.1 (bookworm) | mbedtls 2.16.9-0.1 (bookworm) |
| mbed | mbedtls | >= 0 < 2.16.9-0.1 | 2.16.9-0.1 |
| mbed | mbedtls | >= 0 < 2.16.9-0.1 | 2.16.9-0.1 |
| mbed | mbedtls | >= 0 < 2.16.9-0.1 | 2.16.9-0.1 |
| mbed | mbedtls | >= 0 < 2.16.9-0.1 | 2.16.9-0.1 |
| msrc | azl3_qemu_8.2.0-16_on_azure_linux_3.0 | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
osv7.5HIGH
vendor_debian7.5HIGH
vendor_msrc7.5HIGH
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GHSA
GHSA-jw2m-7hxw-f6q8: An issue was discovered in Arm Mbed TLS before 2
ghsa_unreviewed·2022-05-24
CVE-2020-36426 [HIGH] CWE-125 GHSA-jw2m-7hxw-f6q8: An issue was discovered in Arm Mbed TLS before 2
An issue was discovered in Arm Mbed TLS before 2.24.0. mbedtls_x509_crl_parse_der has a buffer over-read (of one byte).
OSV
CVE-2020-36426: An issue was discovered in Arm Mbed TLS before 2
osv·2021-07-19·CVSS 7.5
CVE-2020-36426 [HIGH] CVE-2020-36426: An issue was discovered in Arm Mbed TLS before 2
An issue was discovered in Arm Mbed TLS before 2.24.0. mbedtls_x509_crl_parse_der has a buffer over-read (of one byte).
Microsoft
An issue was discovered in Arm Mbed TLS before 2.24.0. mbedtls_x509_crl_parse_der has a buffer over-read (of one byte).
vendor_msrc·2021-07-13·CVSS 7.5
CVE-2020-36426 [HIGH] CWE-125 An issue was discovered in Arm Mbed TLS before 2.24.0. mbedtls_x509_crl_parse_der has a buffer over-read (of one byte).
An issue was discovered in Arm Mbed TLS before 2.24.0. mbedtls_x509_crl_parse_der has a buffer over-read (of one byte).
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
mitre: mitre
Customer Action Required:
Debian
CVE-2020-36426: mbedtls - An issue was discovered in Arm Mbed TLS before 2.24.0. mbedtls_x509_crl_parse_de...
vendor_debian·2020·CVSS 7.5
CVE-2020-36426 [HIGH] CVE-2020-36426: mbedtls - An issue was discovered in Arm Mbed TLS before 2.24.0. mbedtls_x509_crl_parse_de...
An issue was discovered in Arm Mbed TLS before 2.24.0. mbedtls_x509_crl_parse_der has a buffer over-read (of one byte).
Scope: local
bookworm: resolved (fixed in 2.16.9-0.1)
bullseye: resolved (fixed in 2.16.9-0.1)
forky: resolved (fixed in 2.16.9-0.1)
sid: resolved (fixed in 2.16.9-0.1)
trixie: resolved (fixed in 2.16.9-0.1)
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://bugs.gentoo.org/740108https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.8https://github.com/ARMmbed/mbedtls/releases/tag/v2.24.0https://github.com/ARMmbed/mbedtls/releases/tag/v2.7.17https://lists.debian.org/debian-lts-announce/2022/12/msg00036.htmlhttps://bugs.gentoo.org/740108https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.8https://github.com/ARMmbed/mbedtls/releases/tag/v2.24.0https://github.com/ARMmbed/mbedtls/releases/tag/v2.7.17https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html
2021-07-19
Published