CVE-2026-111124
published 2026-10-15CVE-2026-111124: CFITSIO through 4.7.0 contains a heap-based out-of-bounds read vulnerability in the imcompress.c unquantize helpers that allows attackers to read memory before…
PriorityP427high7.1CVSS 3.1
AVLACLPRNUIRSUCHINAH
EPSS
0.17%
6.2th percentile
CFITSIO through 4.7.0 contains a heap-based out-of-bounds read vulnerability in the imcompress.c unquantize helpers that allows attackers to read memory before the fits_rand_value table via a zero or negative ZDITHER0 seed. Attackers can supply a crafted FITS file with a SUBTRACTIVE_DITHER_1 compressed image, read through fits_open_file() and fits_read_pix(), to cause crashes or leak heap contents in decoded pixels.
Affected
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| heasarc | cfitsio | <= 4.7.0 | — |
| heasarc | cfitsio | — | — |
| nasa | cfitsio | <= 4.7.0 | — |
CVSS provenance
nvdv3.17.1HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
nvdv4.06.9MEDIUMCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vendor_redhat6.1MEDIUM
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Red Hat
cfitsio: cfitsio: Denial of Service via out-of-bounds read during image decompression
vendor_redhat·2026-10-15·CVSS 6.1
CVE-2026-111124 [MEDIUM] CWE-125 cfitsio: cfitsio: Denial of Service via out-of-bounds read during image decompression
cfitsio: cfitsio: Denial of Service via out-of-bounds read during image decompression
A flaw was found in cfitsio. An attacker could exploit this vulnerability by supplying a specially crafted Flexible Image Transport System (FITS) file containing compressed image data with invalid dither parameters. When processed by an application using the library, this flaw triggers an out-of-bounds heap read that can cause the application to crash, resulting in a Denial of Service (DoS), or potentially lead to unauthorized information disclosure by leaking heap memory.
Package: cfitsio (Red Hat Enterprise Linux 10) - Fix deferred
Package: cfitsio (Red Hat Enterprise Linux AI (RHEL AI) 3) - Fix deferred
GHSA
CFITSIO through 4.7.0 contains a heap-based out-of-bounds read vulnerability in the imcompress.c unquantize helpers that allows attackers to read memory before the fits_rand_value table via a zero or
ghsa_unreviewed·2026-10-15
CVE-2026-111124 [MEDIUM] CWE-125 CFITSIO through 4.7.0 contains a heap-based out-of-bounds read vulnerability in the imcompress.c unquantize helpers that allows attackers to read memory before the fits_rand_value table via a zero or
CFITSIO through 4.7.0 contains a heap-based out-of-bounds read vulnerability in the imcompress.c unquantize helpers that allows attackers to read memory before the fits_rand_value table via a zero or negative ZDITHER0 seed. Attackers can supply a crafted FITS file with a SUBTRACTIVE_DITHER_1 compressed image, read through fits_open_file() and fits_read_pix(), to cause crashes or leak heap contents in decoded pixels.
No detection rules found.
No public exploits indexed.
https://github.com/HEASARC/cfitsiohttps://github.com/HEASARC/cfitsio/blob/d6d27653740864a0483e74cff23c53e34e1dceee/imcompress.c#L5353-L5362https://github.com/HEASARC/cfitsio/blob/d6d27653740864a0483e74cff23c53e34e1dceee/imcompress.c#L7495-L7516https://hackmd.io/@haind-pwn/cfitsio-zdither0-dither-seed-oob-readhttps://www.vulncheck.com/advisories/cfitsio-through-4.7.0-heap-out-of-bounds-read-via-negative-zdither0-seed
2026-10-15
Published