CVE-2026-122330 Blosc c-blosc2 before 3.5.0 Divide-by-Zero via blosc2_schunk_get_slice_buffer()
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-122330?
CVE-2026-122330 is a medium-severity vulnerability in c-blosc2, published on 5 Nov 2026.
Official description
Blosc c-blosc2 before 3.5.0 contains a divide-by-zero vulnerability in blosc2_schunk_get_slice_buffer() in blosc/schunk.c that allows attackers to crash applications by supplying crafted frames with unchecked zero chunksize or blocksize values. Attackers can provide a malicious Blosc2 frame opened via blosc2_schunk_open() or blosc2_schunk_from_buffer() and read as a slice, raising SIGFPE and terminating the process.
Weakness: CWE-369
Which versions are affected by CVE-2026-122330?
How do I fix CVE-2026-122330?
No fix has been published for CVE-2026-122330 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-122330 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-122330 exists.
Sources
Also known as AZL-112694, DEBIAN-CVE-2026-122330, GHSA-99fx-294r-j6xw, UBUNTU-CVE-2026-122330.