Description
A stack overflow in libyang <= v1.0.225 can cause a denial of service through function lyxml_parse_mem(). lyxml_parse_elem() function will be called recursively, which will consume stack space and lead to crash.
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 | libyang | 3.4.2+dfsg-2 | — |
| Debian 13 | libyang | 3.4.2+dfsg-2 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | libyang | No fix yet | — |
| Ubuntu 20.04 LTS | libyang | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP4 | libyang | 1.0.184-150300.3.6.1 | SUSE-SU-2022:3245-1 |
| SLES 15 SP3 | libyang | 1.0.184-150300.3.6.1 | SUSE-SU-2022:3245-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.4 | libyang | 1.0.184-150300.3.6.1 | SUSE-SU-2022:3245-1 |
| openSUSE Leap 15.3 | libyang | 1.0.184-150300.3.6.1 | SUSE-SU-2022:3245-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.14 | libyang | 1.0.215-r1 | — |
| Alpine v3.13 | libyang | 1.0.184-r1 | — |
Advisories 1
- SUSE-SU-2022:3245-1 Security update for libyang SUSE / openSUSE Security Updates · Feb 4, 2026
References
- https://github.com/CESNET/libyang/issues/1453
- GLSA-202107-54 vendor-advisory