Medium [CVE-2026-58010] buffer over-read in glib/gvariant-serialiser.c via gvs_tuple_is_normal
This medium-severity Red Hat Linux advisory covers CVE-2026-58010 affecting Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 7 Extended Lifecycle Support, Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
VulniPulse record published
Android app · Google Play
Monitor future Red Hat Linux CVEs from your phone.
Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 32 official vendor sources and 160+ reviewed platform categories.
Summary
A flaw was found in GLib. An off-by-one error can occur in the gvs_tuple_is_normal function in the glib/gvariant-serialiser.c file when doing an alignment padding check because the bounds check uses > instead of >=, causing an out-of-bounds read of only 1 byte.
This issue can cause a minor information disclosure of 1 byte and a denial of service when the out-of-bounds read crosses a page boundary.
Any applications calling the `g_variant_is_normal_form()`, `g_variant_get_normal_form()` or `g_variant_byteswap()` functions that process untrusted GVariant data received from D-Bus, network or file are vulnerable to this issue. Due to these reasons, this vulnerability has been rated with a moderate severity.
Red Hat severity: Moderate — CVSS 6.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L). Weakness: CWE-126.
Affected products named by the advisory: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; and 19 more.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 4 days ago·verify at source
- glib2-0:2.80.4-12.el10_2.21
- glib2-0:2.80.4-4.el10_0.17
- glib2-0:2.56.1-13.el7_9.1
- mingw-glib2-0:2.70.1-9.el8_10
- glib2-0:2.56.4-177.el8_10
- glib2-0:2.56.4-10.el8_4.7
- glib2-0:2.56.4-158.el8_6.7
- glib2-0:2.56.4-165.el8_8.2
- glib2-0:2.68.4-19.el9_8.9
- glib2-0:2.68.4-7.el9_2.7
- glib2-0:2.68.4-14.el9_4.8
- glib2-0:2.68.4-16.el9_6.7
- cert-manager/cert-manager-operator-rhel9:1788348522
- cert-manager/jetstack-cert-manager-acmesolver-rhel9:1788348571
- cert-manager/jetstack-cert-manager-rhel9:1788348571
- cert-manager/cert-manager-istio-csr-rhel9:1788348594
- cert-manager/jetstack-cert-manager-rhel9:1790223279
- cert-manager/cert-manager-istio-csr-rhel9:1790223719
- cert-manager/cert-manager-operator-rhel9:1790272426
- cert-manager/jetstack-cert-manager-acmesolver-rhel9:1790589998
- cert-manager/jetstack-cert-manager-rhel9:1790589912
- cert-manager/cert-manager-istio-csr-rhel9:1790589914
- cert-manager/cert-manager-operator-rhel9:1790589855
- cert-manager/cert-manager-trust-manager-rhel9:1790598593
- rhaiis/model-opt-cuda-rhel9:1790621714
- rhaiis/vllm-cuda-rhel9:1790621718
- rhaiis/vllm-rocm-rhel9:1790621713
- discovery/discovery-server-rhel9:1788205779
- discovery/discovery-ui-rhel9:1788206196
- rhai/base-image-rocm-rhel9:1790276886
- rhai/base-image-tpu-rhel9:1790276884
- rhai/base-image-cpu-rhel9:1790277045
- rhai/base-image-spyre-rhel9:1790276889
- rhai/base-image-cuda-rhel9:1790276974
- rhai/base-image-tpu-rhel9:1790703497
- rhai/base-image-rocm-rhel9:1790703506
- rhai/base-image-cpu-rhel9:1790703590
- rhai/base-image-spyre-rhel9:1790703568
- rhai/base-image-cuda-rhel9:1790703586
- rhai/base-image-rocm-rhel9:1790703494
- RHSA-2026:57015
- RHSA-2026:65767
- RHSA-2026:65773
- RHSA-2026:49512
- RHSA-2026:61766
- RHSA-2026:65762
- RHSA-2026:65769
- RHSA-2026:65771
- RHSA-2026:55440
- RHSA-2026:65768
Official advisory · high-confidence parse· fetched 4 days ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Official advisory · high-confidence parse· fetched 4 days ago·verify at source
Discussion(0)
No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.
Sign in to join the discussion.