Description
A flaw was found in glibc. The realpath() function can mistakenly return an unexpected value, potentially leading to information leakage and disclosure of sensitive data.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | glibc | Affects glibc v2.33 and above. | — |
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 | 2.33-4 | — |
| Debian 13 | glibc | 2.33-4 | — |
| Debian 12 | glibc | 2.33-4 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | glibc | 2.31-0ubuntu9.7 | USN-5310-1 |
| Ubuntu 18.04 LTS | glibc | 2.27-3ubuntu1.5 | USN-5310-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | glibc | 2.35-1.1 | openSUSE-SU-2024:11850-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | glibc | 2.35-7 | — |
Advisories 8
- 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-5310-1 glibc vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- WID-SEC-2022-1206 GNU libc: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 17, 2025
- ICSA-23-348-10 Siemens SIMATIC S7-1500 CISA ICS & IT advisories · Aug 12, 2025
- openSUSE-SU-2024:11850-1 glibc-2.35-1.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
- ICSA-23-166-10 Siemens SIMATIC S7-1500 TM MFP BIOS CISA ICS & IT advisories · Apr 9, 2024
- SSA-831302 SSA-831302: Vulnerabilities in the BIOS of the SIMATIC S7-1500 TM MFP before V1.3.0 Siemens ProductCERT · Apr 9, 2024
- WID-SEC-2023-1432 Siemens SIMATIC S7: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 22, 2023
References
- https://www.openwall.com/lists/oss-security/2022/01/24/4
- https://sourceware.org/bugzilla/show_bug.cgi?id=28770
- https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=ee8d5e33adb284601c00c94687bc907e10aec9bb
- https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=84d2d0fe20bdf94feed82b21b4d7d136db471f03
- https://bugzilla.redhat.com/show_bug.cgi?id=2024633
- https://access.redhat.com/security/cve/CVE-2021-3998
- https://security-tracker.debian.org/tracker/CVE-2021-3998
- https://security.netapp.com/advisory/ntap-20221020-0003/