Description
The GNU C Library (aka glibc or libc6) before 2.32 could overflow an on-stack buffer during range reduction if an input to an 80-bit long double function contains a non-canonical bit pattern, a seen when passing a 0x5d414141414141410000 value to sinl on x86 targets. This is related to sysdeps/ieee754/ldbl-96/e_rem_pio2l.c.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | glibc | 2.30-1 | — |
| Debian 13 | glibc | 2.30-1 | — |
| Debian 12 | glibc | 2.30-1 | — |
| Debian 10 | glibc | 2.28-10+deb10u2 | DLA-3152-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | glibc | 2.27-3ubuntu1.2 | USN-4416-1 |
| Ubuntu 16.04 LTS | glibc | 2.23-0ubuntu11.2 | USN-4416-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | eglibc | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | nscd +212 | 2.28-127.el8 | RHSA-2020:4444 |
| RHEL 7 | nscd +7 | 2.17-322.el7_9 | RHSA-2021:0348 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7.7 EUS | nscd +7 | 2.17-292.el7_7.2 | RHSA-2021:2998 |
| RHEL 7.6 TUS | nscd +7 | 2.17-260.el7_6.9 | RHSA-2021:3315 |
| RHEL 7.6 E4S | nscd +7 | 2.17-260.el7_6.9 | RHSA-2021:3315 |
| RHEL 7.6 AUS | nscd +7 | 2.17-260.el7_6.9 | RHSA-2021:3315 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | glibc | 2.26-13.39.1 | SUSE-SU-2020:0668-1 |
| SLES 12 SP5 | glibc | 2.22-100.21.5 | SUSE-SU-2020:0832-1 |
| SLES 12 SP4 | glibc | 2.22-100.21.5 | SUSE-SU-2020:0832-1 |
| SLES 12 SP3 | glibc | 2.22-113.4 | SUSE-SU-2020:3024-1 |
| SLES 12 SP2 | glibc | 2.22-113.4 | SUSE-SU-2020:3024-1 |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP5 | glibc | 2.22-100.21.5 | SUSE-SU-2020:0832-1 |
| SLES for SAP 12 SP4 | glibc | 2.22-100.21.5 | SUSE-SU-2020:0832-1 |
| SLES for SAP 12 SP3 | glibc | 2.22-113.4 | SUSE-SU-2020:3024-1 |
| SLES for SAP 12 SP2 | glibc | 2.22-113.4 | SUSE-SU-2020:3024-1 |
| SUSE OpenStack Cloud Crowbar 8 | glibc | 2.22-113.4 | SUSE-SU-2020:3024-1 |
| SUSE OpenStack Cloud 8 | glibc | 2.22-113.4 | SUSE-SU-2020:3024-1 |
| SUSE OpenStack Cloud 7 | glibc | 2.22-113.4 | SUSE-SU-2020:3024-1 |
| SUSE HPE Helion OpenStack 8 | glibc | 2.22-113.4 | SUSE-SU-2020:3024-1 |
| SUSE Enterprise Storage 5 | glibc | 2.22-113.4 | SUSE-SU-2020:3024-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | glibc | 2.34-1.2 | openSUSE-SU-2024:10792-1 |
| openSUSE Leap 15.1 | glibc +1 | 2.26-lp151.19.3.1 | openSUSE-SU-2020:0381-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | nscd +199 | 2.26-37.amzn2 | ALAS2-2023-2221 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | nscd +211 | 2.28-127.0.1.el8 | ELSA-2020-4444 |
| Oracle Linux 7 | nscd +6 | 2.17-322.0.2.el7_9 | ELSA-2021-0348 |
Advisories 21
- RHSA-2021:3315 Red Hat Security Advisory: glibc security and bug fix update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2021:2998 Red Hat Security Advisory: glibc security update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2021:0348 Red Hat Security Advisory: glibc security and bug fix update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- RHSA-2020:4444 Red Hat Security Advisory: glibc security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 15, 2026
- SSA-398330 SSA-398330: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.5 Siemens ProductCERT · Oct 13, 2026
- USN-4416-1 glibc vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DLA-3152-1 glibc - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2020:0668-1 Security update for glibc SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10792-1 glibc-2.34-1.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0832-1 Security update for glibc SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:0381-1 Security update for glibc SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2024-1186 IBM DB2 REST: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jan 25, 2026
- ICSA-23-348-10 Siemens SIMATIC S7-1500 CISA ICS & IT advisories · Aug 12, 2025
- SUSE-SU-2020:3024-1 Security update for glibc SUSE / openSUSE Security Updates · May 2, 2025
- SSA-831302 SSA-831302: Vulnerabilities in the BIOS of the SIMATIC S7-1500 TM MFP before V1.3.0 Siemens ProductCERT · Apr 9, 2024
- ICSA-23-166-10 Siemens SIMATIC S7-1500 TM MFP BIOS CISA ICS & IT advisories · Apr 9, 2024
- WID-SEC-2022-1746 GNU libc: Schwachstelle ermöglicht nicht spezifizierten Angriff BSI CERT-Bund (WID) · Aug 23, 2023
- ALAS2-2023-2221 Moderate: glibc security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Aug 23, 2023
- WID-SEC-2023-1432 Siemens SIMATIC S7: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 22, 2023
- ELSA-2021-0348 Moderate: glibc security and bug fix update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Feb 5, 2021
- ELSA-2020-4444 Moderate: glibc security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 10, 2020
References
- https://sourceware.org/bugzilla/show_bug.cgi?id=25487
- https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Ba=commit%3Bh=9333498794cde1d5cca518badf79533a24114b6f
- openSUSE-SU-2020:0381 vendor-advisory
- https://security.netapp.com/advisory/ntap-20200327-0003/
- FEDORA-2020-444c372453 vendor-advisory
- FEDORA-2020-244efc27af vendor-advisory
- FEDORA-2020-7f625c5ea8 vendor-advisory
- GLSA-202006-04 vendor-advisory
- USN-4416-1 vendor-advisory
- [debian-lts-announce] 20221017 [SECURITY] [DLA 3152-1] glibc security update mailing-list