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High

Pillow vulnerability can cause write buffer overflow on BCn encoding

  • Disclosed: 01.07.2025
  • Updated: 11.10.2026 15:17

There is a heap buffer overflow when writing a sufficiently large (>64k encoded with default settings) image in the DDS format due to writing into a buffer without checking for available space.

This only affects users who save untrusted data as a compressed DDS image.

  • Unclear how large the potential write could be. It is likely limited by process segfault, so it's not necessarily deterministic. It may be practically unbounded.
  • Unclear if there's a restriction on the bytes that could be emitted. It's likely that the only restriction is that the bytes would be emitted in chunks of 8 or 16.

This was introduced in Pillow 11.2.0 when the feature was added.

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
Python (PyPI) pillow >= 11.2.0, < 11.3.0 11.3.0

References

CVSS score 7.1/10
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Weakness (CWE)
CWE-122
Platform
Python (PyPI)
Package
pillow
Disclosed
01.07.2025
Updated
11.10.2026 15:17

Sources and licenses

OSV / GitHub Advisory Database - PYSEC-2025-61 - PyPA Advisory Database; CC BY 4.0

OSV / GitHub Advisory Database - GHSA-xg8h-j46f-w952 - CC BY 4.0

Vulnerability history: pillow

All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (81) in the archive
Total entries
81
First → latest
04.2014 10.2026
Without a fix
0
Exploited in attacks
1

Severity breakdown

  • Critical 10
  • High 53
  • Medium 16
  • Low 1
  • Unrated 1

Disclosures per year

earlier: 12

Severity:
  1. Pillow: Out-of-bounds access in _imagingmorph on a zero-width image
    High CVE-2026-112397 < 13.0.0 13.0.0
  2. Pillow: GIF seek keeps rejected size after DecompressionBombError, allowing DoS
    High CVE-2026-112400 >= 9.2.0, < 13.0.0 13.0.0
  3. Pillow: Unbounded recursion parsing a PDF page tree or trailer chain (incomplete fix for CVE-2026-42310)
    High CVE-2026-112895 >= 5.1.0, < 13.0.0 13.0.0
  4. Pillow JPEG2000 tiled decode retains a growing scratch buffer and can be used for denial of service
    High CVE-2026-59204 >= 8.2.0, < 12.3.0 12.3.0
  5. Pillow: Decompression Bomb DoS via PdfParser.PdfStream.decode()
    High · 7.5 CVE-2026-59200 >= 5.1.0, < 12.3.0 12.3.0
  6. Pillow: Out-of-bounds read via attacker-controlled row stride on Pillow's mmap path (McIdas AREA files)
    High CVE-2026-54058 < 12.3.0 12.3.0
  7. Pillow: Heap out-of-bounds write in `ImageFilter.RankFilter` via integer overflow in `ImagingExpand`
    High · 8.2 CVE-2026-59197 < 12.3.0 12.3.0
  8. Pillow: Controlled heap out-of-bounds write in Pillow `ImageCmsTransform.apply()` via output mode mismatch
    High · 7.5 CVE-2026-59205 < 12.3.0 12.3.0
  9. Pillow: Heap out-of-bounds write `Image.paste()` / `Image.crop()` via signed coordinate overflow
    High · 7.5 CVE-2026-59199 < 12.3.0 12.3.0
  10. Pillow: `FontFile.compile()`: `Image.new()` called without `_decompression_bomb_check()`
    High · 7.5 CVE-2026-54060 < 12.3.0 12.3.0
  11. Pillow `PcfFontFile._load_bitmaps()`: `Image.frombytes()` called without `_decompression_bomb_check()` — bomb protection bypass via PCF font loading
    High · 7.5 CVE-2026-54059 < 12.3.0 12.3.0
  12. Pillow `BdfFontFile`: `Image.new()` called without `_decompression_bomb_check()` — bomb protection bypass via font loading
    High · 7.5 CVE-2026-55379 < 12.3.0 12.3.0
  13. Pillow `GdImageFile._open()`: image dimensions accepted without `_decompression_bomb_check()`
    High · 7.5 CVE-2026-55380 < 12.3.0 12.3.0
  14. Pillow has an OOB Write with Invalid PSD Tile Extents (Integer Overflow)
    High CVE-2026-42311 >= 10.3.0, < 12.2.0 12.2.0
  15. FITS GZIP decompression bomb in Pillow
    High · 7.5 CVE-2026-40192 >= 10.3.0, < 12.2.0 12.2.0
  16. Pillow affected by out-of-bounds write when loading PSD images
    High CVE-2026-25990 >= 10.3.0, < 12.1.1 12.1.1
  17. Pillow vulnerability can cause write buffer overflow on BCn encoding this entry
    High · 7.1 CVE-2025-48379 >= 11.2.0, < 11.3.0 11.3.0
  18. Pillow buffer overflow vulnerability
    High · 6.7 CVE-2024-28219 < 10.3.0 10.3.0
  19. Arbitrary Code Execution in Pillow
    Critical · 8.1 CVE-2023-50447 < 10.2.0 10.2.0
  20. An issue was discovered in Pillow before 10.0.0. It is a Denial of Service that uncontrollably allocates memory to process a given task, potentially causing a service to crash by having it run out of
    High · 7.5 CVE-2023-44271 < 10.0.0 10.0.0
  21. libwebp: OOB write in BuildHuffmanTable
    High · 8.8 Exploited in attacks CVE-2023-4863 < 10.0.1 10.0.1
  22. Pillow before 9.3.0 allows denial of service via SAMPLESPERPIXEL.
    High · 7.5 CVE-2022-45199 >= 9.2.0, < 9.3.0 9.3.0
  23. Pillow before 9.2.0 performs Improper Handling of Highly Compressed GIF Data (Data Amplification).
    High · 7.5 CVE-2022-45198 < 9.2.0 9.2.0
  24. Buffer over-flow in Pillow
    High · 7.5 CVE-2022-30595 >= 9.1.0, < 9.1.1 9.1.1
  25. Path traversal in Pillow
    High · 9.1 CVE-2022-24303 < 9.0.1 9.0.1
  26. Arbitrary expression injection in Pillow
    Critical · 9.8 CVE-2022-22817 < 9.0.1 9.0.1
  27. Uncontrolled Resource Consumption in pillow
    High · 7.5 CVE-2021-23437 >= 5.2.0, < 8.3.2 8.3.2
  28. Buffer Overflow in Pillow
    Critical · 9.8 CVE-2021-34552 < 8.3.0 8.3.0
  29. Uncontrolled Resource Consumption in Pillow
    High · 7.5 CVE-2021-28677 < 8.2.0 8.2.0
  30. Potential infinite loop in Pillow
    High · 7.5 CVE-2021-28676 < 8.2.0 8.2.0
  31. Pillow Out-of-bounds Read vulnerability
    High · 9.1 CVE-2021-25288 >= 2.4.0, < 8.2.0 8.2.0
  32. Out-of-bounds Read in Pillow
    High · 9.1 CVE-2021-25287 >= 2.4.0, < 8.2.0 8.2.0
  33. Pillow denial of service
    High · 5.5 CVE-2021-28675 < 8.2.0 8.2.0
  34. Out of bounds read in Pillow
    High · 7.5 CVE-2021-25293 >= 4.3.0, < 8.1.1 8.1.1
  35. Out of bounds read in Pillow
    High · 7.5 CVE-2021-25291 < 8.2.0 8.2.0
  36. Out-of-bounds Write in Pillow
    High · 7.5 CVE-2021-25290 < 8.1.1 8.1.1
  37. Out of bounds write in Pillow
    Critical · 9.8 CVE-2021-25289 < 8.1.1 8.1.1
  38. Pillow Denial of Service by Uncontrolled Resource Consumption
    High · 7.5 CVE-2021-27923 < 8.1.2 8.1.2
  39. Pillow Uncontrolled Resource Consumption
    High · 7.5 CVE-2021-27922 < 8.1.2 8.1.2
  40. Pillow Denial of Service by Uncontrolled Resource Consumption
    High · 7.5 CVE-2021-27921 < 8.1.2 8.1.2
  41. Pillow Out-of-bounds Write
    High · 8.8 CVE-2020-35654 < 8.1.0 8.1.0
  42. Pillow Out-of-bounds Read
    High · 7.1 CVE-2020-35653 < 8.1.0 8.1.0
  43. In Pillow before 7.1.0, there are two Buffer Overflows in libImaging/TiffDecode.c.
    High · 7.8 CVE-2020-10379 < 7.1.0 7.1.0
  44. In libImaging/PcxDecode.c in Pillow before 7.1.0, an out-of-bounds read can occur when reading PCX files where state->shuffle is instructed to read beyond state->buffer.
    High · 5.5 CVE-2020-10378 < 7.1.0 7.1.0
  45. Out-of-bounds read in Pillow
    Critical · 8.1 CVE-2020-11538 < 7.1.0 7.1.0
  46. Out-of-bounds reads in Pillow
    High · 5.5 CVE-2020-10994 < 7.1.0 7.1.0
  47. Out-of-bounds reads in Pillow
    High · 5.5 CVE-2020-10177 < 7.1.0 7.1.0
  48. Uncontrolled Resource Consumption in Pillow
    High · 7.5 CVE-2019-19911 < 6.2.2 6.2.2
  49. Out-of-bounds Read in Pillow
    High · 7.1 CVE-2020-5313 < 6.2.2 6.2.2
  50. PCX P mode buffer overflow in Pillow
    Critical · 9.8 CVE-2020-5312 < 6.2.2 6.2.2
  51. Buffer Copy without Checking Size of Input in Pillow
    Critical · 9.8 CVE-2020-5311 < 6.2.2 6.2.2
  52. Integer overflow in Pillow
    Critical · 8.8 CVE-2020-5310 < 6.2.2 6.2.2
  53. DOS attack in Pillow when processing specially crafted image files
    High · 7.5 CVE-2019-16865 < 6.2.0 6.2.0
  54. Heap-based buffer overflow in the j2k_encode_entry function in Pillow 2.5.0 through 3.1.1 allows remote attackers to cause a denial of service (memory corruption) via a crafted Jpeg2000 file.
    High · 5.5 CVE-2016-3076 >= 2.5.0, < 3.1.2 3.1.2
  55. Arbitrary code using "crafted image file" approach affecting Pillow
    High · 7.8 CVE-2016-9190 < 3.3.2 3.3.2
  56. Pillow buffer overflow in ImagingPcdDecode
    High · 6.5 CVE-2016-2533 < 3.1.1 3.1.1
  57. Pillow Integer overflow in ImagingResampleHorizontal
    Critical · 9.8 CVE-2016-4009 < 3.1.1 3.1.1
  58. Pillow Buffer overflow in ImagingFliDecode
    High · 6.5 CVE-2016-0775 < 3.1.1 3.1.1
  59. The Jpeg2KImagePlugin plugin in Pillow before 2.5.3 allows remote attackers to cause a denial of service via a crafted image.
    High · 7.5 CVE-2014-3598 < 2.5.3 2.5.3
  60. Pillow before 2.7.0 allows remote attackers to cause a denial of service via a compressed text chunk in a PNG image that has a large size when it is decompressed.
    High · 7.5 CVE-2014-9601 < 2.7.0 2.7.0
Show more (3) Showing 60 of 63

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