CVE-2020-10730: debian debian_linux Use After Free
Vulnerability summary
CVE-2020-10730 is a medium (CVSS 6.5) Use After Free vulnerability in debian debian_linux. EPSS estimates a 2.44% chance of exploitation in the next 30 days, higher than 84.3% of scored vulnerabilities.
Not severe (CVSS 6.5, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 12 · Related 9Timeline
- 07-07-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
A NULL pointer dereference, or possible use-after-free flaw was found in Samba AD LDAP server in versions before 4.10.17, before 4.11.11 and before 4.12.4. Although some versions of Samba shipped with Red Hat Enterprise Linux do not support Samba in AD mode, the affected code is shipped with the libldb package. This flaw allows an authenticated user to possibly trigger a use-after-free or NULL pointer dereference. The highest threat from this vulnerability is to system availability.
CVSS metrics
6 scores · 5 sources · 2 versions- OSV · AlpineEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · Red hatEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
2.44%
Chance of exploitation in the next 30 days
Percentile
84%
Versus all other CVEs
30-day change
No change 0.00 pp
From 2.44% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-416Use After FreeThe product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
- CWE-476NULL Pointer DereferenceThe product dereferences a pointer that it expects to be valid but is NULL.
Affected systems
Known conditions: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Redhat50 products
- storage3.0
- ctdb< 0:4.11.6-107.el7rhgs | < 0:4.11.6-107.el8rhgs
- ctdb-debuginfo< 0:4.11.6-107.el8rhgs
- ctdb-tests-debuginfo< 0:4.11.6-107.el8rhgs
- ldb-tools< 0:2.1.3-2.el8
Debian2 products
- samba< 2:4.12.5+dfsg-1
- debian_linuxEOL9.0 | 10.0
Opensuse2 products
- leapEOL15.1 | 15.2
- ldb&distro=openSUSE Leap 15.1< 1.4.6-lp151.2.3.1
Suse2 products
- ldb&distro=SUSE Linux Enterprise Module for Basesystem 15 SP1< 1.4.6-3.5.2
- ldb&distro=SUSE Linux Enterprise Module for Python 2 15 SP1< 1.4.6-3.5.2
Alpine1 product
- samba≥ 4.5.0, < 4.10.17-r0 | ≥ 4.5.0, < 4.11.14-r0 | ≥ 4.5.0, < 4.12.5-r0
Fedoraproject1 product
- fedoraEOL31
Samba1 product
- samba≥ 4.5.0, < 4.10.17 | ≥ 4.11.0, < 4.11.11 | ≥ 4.12.0, < 4.12.4
Ubuntu1 product
- samba< 2:4.7.6+dfsg~ubuntu-0ubuntu2.17 | < 2:4.11.6+dfsg-0ubuntu1.3
8 vendors · 60 products
References
31 links- bugzilla.redhat.com/show_bug.cgi?id=1849489%3BX Refsource MISC
- lists.opensuse.org/opensuse-security-announce/2020-07/msg00030.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-07/msg00054.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-08/msg00000.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-09/msg00002.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
lists.debian.org/debian-lts-announce/2020/11/msg00041.htmlMailing ListX Refsource MLISTIssue TrackingThird Party Advisory
Show all 31 references
- lists.opensuse.org/archives/…Advisory