[security][HIGH] postgresql16 16.13: 6 CVE require triage #5

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opened 2026-05-25 00:46:41 +03:00 by sbelikov · 0 comments

sbelikov commented

2026-05-25 00:46:41 +03:00

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CVE triage request / Запрос на разбор CVE

Package / Пакет

Package: postgresql16
Version: 16.13
EVR: 16.13-1
Category: -
Policy class: -
NiceOS policy class: -
Owner: -
Severity: HIGH
Max CVSS: 8.8
CVE count: 6

LLM recommendation / Рекомендация LLM

RU

Для пакета postgresql16 16.13 найдены CVE-кандидаты по данным NVD/CPE: CVE-2026-6473, CVE-2026-6475, CVE-2026-6477, CVE-2026-6479, CVE-2026-6637, CVE-2026-6638. Требуется triage security-team.

Проверить применимость CVE к сборке НАЙС.ОС, сопоставить с upstream/vendor advisory, определить статус affected/fixed/not_affected и при необходимости подготовить обновление пакета.

Рекомендуемое действие: needs_triage

Подсказка по целевой версии: -

Проверки: Проверить сборку RPM, обновление пакета, совместимость зависимостей, service/CLI smoke tests и регрессионные сценарии по классу пакета.

Риски: Автоматическое совпадение NVD/CPE не является финальным вердиктом по НАЙС.ОС.

EN

NVD/CPE candidate CVEs were found for postgresql16 16.13: CVE-2026-6473, CVE-2026-6475, CVE-2026-6477, CVE-2026-6479, CVE-2026-6637, CVE-2026-6638. Security-team triage is required.

Verify CVE applicability to the NiceOS build, compare with upstream/vendor advisories, set affected/fixed/not_affected status, and prepare a package update if required.

Recommended action: needs_triage

Target version hint: -

Tests: Run RPM build, package upgrade, dependency compatibility, service/CLI smoke tests, and package-class-specific regression tests.

Risks: An automatic NVD/CPE match is not the final NiceOS vulnerability verdict.

CVE candidates from NVD/CPE

CVE	Severity	CVSS	Match	NiceOS status	Reason
CVE-2026-6473	HIGH	8.8	cpe-range	needs_triage	package version is inside version range
CVE-2026-6475	HIGH	8.8	cpe-range	needs_triage	package version is inside version range
CVE-2026-6477	HIGH	8.8	cpe-range	needs_triage	package version is inside version range
CVE-2026-6637	HIGH	8.8	cpe-range	needs_triage	package version is inside version range
CVE-2026-6638	HIGH	8.8	cpe-range	needs_triage	package version is inside version range
CVE-2026-6479	HIGH	7.5	cpe-range	needs_triage	package version is inside version range

Descriptions

CVE-2026-6473

Integer wraparound in multiple PostgreSQL server features allows an unprivileged database user to cause the server to undersize an allocation and write out-of-bounds. This may execute arbitrary code as the operating system user running the database. In applications that pass gigabyte-scale user inputs to the relevant database functions, the application input provider may achieve a segmentation fault. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.

CVE-2026-6475

Symlink following in PostgreSQL pg_basebackup plain format and in pg_rewind allows an origin superuser to overwrite local files, e.g. /var/lib/postgres/.bashrc, that hijack the operating system account. It will remain the case that starting the server after these commands implicitly trusts the origin superuser, due to features like shared_preload_libraries. Hence, the attack has practical implications only if one takes relevant action between these commands and server start, like moving the files to a different VM or snapshotting the VM. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.

CVE-2026-6477

Use of inherently dangerous function PQfn(..., result_is_int=0, ...) in PostgreSQL libpq lo_export(), lo_read(), lo_lseek64(), and lo_tell64() functions allows the server superuser to overwrite a client stack buffer with an arbitrarily-large response. Like gets(), PQfn(..., result_is_int=0, ...) stores arbitrary-length, server-determined data into a buffer of unspecified size. Because both the \lo_export command in psql and pg_dump call lo_read(), the server superuser can overwrite pg_dump or psql stack memory. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.

CVE-2026-6637

Stack buffer overflow in PostgreSQL module "refint" allows an unprivileged database user to execute arbitrary code as the operating system user running the database. A distinct attack is possible if the application declares a user-controlled column as a "refint" cascade primary key and facilitates user-controlled updates to that column. In that case, a SQL injection allows a primary key update value provider to execute arbitrary SQL as the database user performing the primary key update. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.

CVE-2026-6638

SQL injection in PostgreSQL logical replication ALTER SUBSCRIPTION ... REFRESH PUBLICATION allows a subscriber table creator to execute arbitrary SQL with the subscription's publication-side credentials. The attack takes effect at the next REFRESH PUBLICATION. Within major versions 16, 17, and 18, minor versions before PostgreSQL 18.4, 17.10, and 16.14 are affected. Versions before PostgreSQL 16 are unaffected.

CVE-2026-6479

Uncontrolled recursion in PostgreSQL SSL and GSS negotiation allows an attacker able to connect to a PostgreSQL AF_UNIX socket to achieve sustained denial of service. If SSL and GSS are both disabled, an attacker can do the same via access to a PostgreSQL TCP socket. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.

Maintainer checklist

Verify whether each CVE applies to the NiceOS build.
Compare NVD data with upstream/vendor advisory.
Set final NiceOS status: affected, fixed, not_affected, false_positive, deferred, or not_in_cloud_image.
If affected, decide update/backport strategy according to package policy class.
Run package-class-specific build, upgrade and regression tests.
Add/update niceos_cve_triage entry.
Create NICE-SA advisory if a security update is shipped.

Machine metadata

{
  "cves": [
    "CVE-2026-6473",
    "CVE-2026-6475",
    "CVE-2026-6477",
    "CVE-2026-6479",
    "CVE-2026-6637",
    "CVE-2026-6638"
  ],
  "fingerprint": "3e607f8c346cc344cb8b",
  "generated_at": "2026-05-24T21:46:41Z",
  "package": "postgresql16",
  "prompt_version": "niceos_cve_issue_analysis_v1",
  "tool": "niceos_cve_create_issues.py",
  "tool_version": "1.0",
  "version": "16.13"
}

# CVE triage request / Запрос на разбор CVE ## Package / Пакет - Package: `postgresql16` - Version: `16.13` - EVR: `16.13-1` - Category: `-` - Policy class: `-` - NiceOS policy class: `-` - Owner: `-` - Severity: `HIGH` - Max CVSS: `8.8` - CVE count: `6` ## LLM recommendation / Рекомендация LLM ### RU Для пакета postgresql16 16.13 найдены CVE-кандидаты по данным NVD/CPE: CVE-2026-6473, CVE-2026-6475, CVE-2026-6477, CVE-2026-6479, CVE-2026-6637, CVE-2026-6638. Требуется triage security-team. Проверить применимость CVE к сборке НАЙС.ОС, сопоставить с upstream/vendor advisory, определить статус affected/fixed/not_affected и при необходимости подготовить обновление пакета. **Рекомендуемое действие:** `needs_triage` **Подсказка по целевой версии:** `-` **Проверки:** Проверить сборку RPM, обновление пакета, совместимость зависимостей, service/CLI smoke tests и регрессионные сценарии по классу пакета. **Риски:** Автоматическое совпадение NVD/CPE не является финальным вердиктом по НАЙС.ОС. ### EN NVD/CPE candidate CVEs were found for postgresql16 16.13: CVE-2026-6473, CVE-2026-6475, CVE-2026-6477, CVE-2026-6479, CVE-2026-6637, CVE-2026-6638. Security-team triage is required. Verify CVE applicability to the NiceOS build, compare with upstream/vendor advisories, set affected/fixed/not_affected status, and prepare a package update if required. **Recommended action:** `needs_triage` **Target version hint:** `-` **Tests:** Run RPM build, package upgrade, dependency compatibility, service/CLI smoke tests, and package-class-specific regression tests. **Risks:** An automatic NVD/CPE match is not the final NiceOS vulnerability verdict. ## CVE candidates from NVD/CPE | CVE | Severity | CVSS | Match | NiceOS status | Reason | |---|---|---:|---|---|---| | CVE-2026-6473 | HIGH | 8.8 | cpe-range | needs_triage | package version is inside version range | | CVE-2026-6475 | HIGH | 8.8 | cpe-range | needs_triage | package version is inside version range | | CVE-2026-6477 | HIGH | 8.8 | cpe-range | needs_triage | package version is inside version range | | CVE-2026-6637 | HIGH | 8.8 | cpe-range | needs_triage | package version is inside version range | | CVE-2026-6638 | HIGH | 8.8 | cpe-range | needs_triage | package version is inside version range | | CVE-2026-6479 | HIGH | 7.5 | cpe-range | needs_triage | package version is inside version range | ## Descriptions ### CVE-2026-6473 Integer wraparound in multiple PostgreSQL server features allows an unprivileged database user to cause the server to undersize an allocation and write out-of-bounds. This may execute arbitrary code as the operating system user running the database. In applications that pass gigabyte-scale user inputs to the relevant database functions, the application input provider may achieve a segmentation fault. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected. ### CVE-2026-6475 Symlink following in PostgreSQL pg_basebackup plain format and in pg_rewind allows an origin superuser to overwrite local files, e.g. /var/lib/postgres/.bashrc, that hijack the operating system account. It will remain the case that starting the server after these commands implicitly trusts the origin superuser, due to features like shared_preload_libraries. Hence, the attack has practical implications only if one takes relevant action between these commands and server start, like moving the files to a different VM or snapshotting the VM. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected. ### CVE-2026-6477 Use of inherently dangerous function PQfn(..., result_is_int=0, ...) in PostgreSQL libpq lo_export(), lo_read(), lo_lseek64(), and lo_tell64() functions allows the server superuser to overwrite a client stack buffer with an arbitrarily-large response. Like gets(), PQfn(..., result_is_int=0, ...) stores arbitrary-length, server-determined data into a buffer of unspecified size. Because both the \lo_export command in psql and pg_dump call lo_read(), the server superuser can overwrite pg_dump or psql stack memory. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected. ### CVE-2026-6637 Stack buffer overflow in PostgreSQL module "refint" allows an unprivileged database user to execute arbitrary code as the operating system user running the database. A distinct attack is possible if the application declares a user-controlled column as a "refint" cascade primary key and facilitates user-controlled updates to that column. In that case, a SQL injection allows a primary key update value provider to execute arbitrary SQL as the database user performing the primary key update. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected. ### CVE-2026-6638 SQL injection in PostgreSQL logical replication ALTER SUBSCRIPTION ... REFRESH PUBLICATION allows a subscriber table creator to execute arbitrary SQL with the subscription's publication-side credentials. The attack takes effect at the next REFRESH PUBLICATION. Within major versions 16, 17, and 18, minor versions before PostgreSQL 18.4, 17.10, and 16.14 are affected. Versions before PostgreSQL 16 are unaffected. ### CVE-2026-6479 Uncontrolled recursion in PostgreSQL SSL and GSS negotiation allows an attacker able to connect to a PostgreSQL AF_UNIX socket to achieve sustained denial of service. If SSL and GSS are both disabled, an attacker can do the same via access to a PostgreSQL TCP socket. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected. ## Maintainer checklist - [ ] Verify whether each CVE applies to the NiceOS build. - [ ] Compare NVD data with upstream/vendor advisory. - [ ] Set final NiceOS status: `affected`, `fixed`, `not_affected`, `false_positive`, `deferred`, or `not_in_cloud_image`. - [ ] If affected, decide update/backport strategy according to package policy class. - [ ] Run package-class-specific build, upgrade and regression tests. - [ ] Add/update `niceos_cve_triage` entry. - [ ] Create `NICE-SA` advisory if a security update is shipped. ## Machine metadata ```json { "cves": [ "CVE-2026-6473", "CVE-2026-6475", "CVE-2026-6477", "CVE-2026-6479", "CVE-2026-6637", "CVE-2026-6638" ], "fingerprint": "3e607f8c346cc344cb8b", "generated_at": "2026-05-24T21:46:41Z", "package": "postgresql16", "prompt_version": "niceos_cve_issue_analysis_v1", "tool": "niceos_cve_create_issues.py", "tool_version": "1.0", "version": "16.13" } ```