🛡️ CVE-2023-5870 — codeready-linux-builder-eus
Description
Postgresql: role pg_signal_backend can signal certain superuser processes.
A flaw was found in PostgreSQL involving the pg_cancel_backend role that signals background workers, including the logical replication launcher, autovacuum workers, and the autovacuum launcher. Successful exploitation requires a non-core extension with a less-resilient background worker and would affect that specific background worker only. This issue may allow a remote high privileged user to launch a denial of service (DoS) attack.
How this vulnerability can be exploited
This issue can be reached over the network, attack complexity is high, an attacker needs administrative privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability low.
CVSS metrics in full
The score comes from this vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L
- Attack vector: Network — reachable from anywhere that can route to the service.
- Attack complexity: High — the attacker first has to win a race, learn a secret or otherwise prepare the target.
- Privileges required: High — administrative rights are needed first.
- User interaction: None — nobody has to be tricked into anything.
- Scope: Unchanged — the damage stays inside the vulnerable component.
- Confidentiality impact: None.
- Integrity impact: None.
- Availability impact: Low — limited, and the attacker does not choose what is affected.
Weakness class
CVE-2023-5870 is classified as CWE-400: Uncontrolled Resource Consumption. A request can consume memory, CPU or storage without limit, exhausting capacity for everyone else.
Affected software
CVE-2023-5870 is recorded against 16 packages.
- codeready-linux-builder-eus
- codeready-linux-builder-eus-for-power-little-endian-eus
- codeready-linux-builder-for-arm64-eus
- codeready-linux-builder-for-ibm-z-systems-eus
- codeready-linux-builder-for-power-little-endian-eus
- enterprise-linux
- enterprise-linux-eus
- enterprise-linux-for-arm-64
- enterprise-linux-for-ibm-z-systems
- enterprise-linux-for-ibm-z-systems-eus
- enterprise-linux-for-power-little-endian
- enterprise-linux-for-power-little-endian-eus
- enterprise-linux-server-aus
- enterprise-linux-server-tus
- postgresql
- software-collections
Timeline and source
Published on 10 December 2023 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.
References
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bugzilla.redhat.com
www.postgresql.org
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Other advisories for this package
codeready-linux-builder-eus has other advisories on record. If you are patching this one, these are worth checking on the same host:
- CVE-2025-1756 (7.5 High, published 27 Feb 2025)
- CVE-2023-3758 (7.1 High, published 18 Apr 2024)
- CVE-2024-1488 (8.0 High, published 15 Feb 2024)
- CVE-2023-6536 (6.5 Medium, published 7 Feb 2024)
- CVE-2023-6535 (6.5 Medium, published 7 Feb 2024)
- CVE-2023-6356 (6.5 Medium, published 7 Feb 2024)
- CVE-2023-5869 (8.8 High, published 10 Dec 2023)
- CVE-2023-5868 (4.3 Medium, published 10 Dec 2023)
Same weakness in other software
These advisories are the same class of weakness (CWE-400: Uncontrolled Resource Consumption) in other software:
- CVE-2024-25039 (7.5 High, published 30 Jul 2026)
- CVE-2024-24769 (2.0 Low, published 13 Jul 2026)
- CVE-2022-23591 (8.0 High, published 9 Jul 2026)
- CVE-2022-21732 (5.0 Medium, published 9 Jul 2026)
- CVE-2024-10821 (8.0 High, published 7 Jul 2026)
- CVE-2024-12778 (8.0 High, published 7 Jul 2026)
- CVE-2024-10713 (8.0 High, published 7 Jul 2026)
- CVE-2023-3637 (4.3 Medium, published 7 Jul 2026)
CVE-2023-5870 on other distributions
Each distribution ships its own build and its own fixed version. Pick the one you run:
Details
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:L
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| codeready-linux-builder-eus | — | — |
| codeready-linux-builder-eus-for-power-little-endian-eus | — | — |
| codeready-linux-builder-for-arm64-eus | — | — |
| codeready-linux-builder-for-ibm-z-systems-eus | — | — |
| codeready-linux-builder-for-power-little-endian-eus | — | — |
| enterprise-linux | — | — |
| enterprise-linux-eus | — | — |
| enterprise-linux-for-arm-64 | — | — |
| enterprise-linux-for-ibm-z-systems | — | — |
| enterprise-linux-for-ibm-z-systems-eus | — | — |
| enterprise-linux-for-power-little-endian | — | — |
| enterprise-linux-for-power-little-endian-eus | — | — |
| enterprise-linux-server-aus | — | — |
| enterprise-linux-server-tus | — | — |
| postgresql | — | — |
| software-collections | — | — |
References
Similar Threats
- High CVE-2025-1756
- High CVE-2023-3758
- High CVE-2024-1488
- Medium CVE-2023-6356
- Medium CVE-2023-6536
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