CVE-2026-22693

HarfBuzz is a text shaping engine. Prior to version 12.3.0, a null pointer dereference vulnerability exists in the SubtableUnicodesCache::create function located in src/hb-ot-cmap-table.hh. The function fails to check if hbmalloc returns NULL before using placement new to construct an object at the returned pointer address. When hbmalloc fails to allocate memory (which can occur in low-memory conditions or when using custom allocators that simulate allocation failures), it returns NULL. The code then attempts to call the constructor on this null pointer using placement new syntax, resulting in undefined behavior and a Segmentation Fault. This issue has been patched in version 12.3.0.

Database specific

{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-476"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/22xxx/CVE-2026-22693.json"
}

References

Affected packages

Git / github.com/harfbuzz/harfbuzz

Affected ranges

Type: GIT
Repo: https://github.com/harfbuzz/harfbuzz
Events: Introduced

0 Unknown introduced commit / All previous commits are affected

Fixed

b0af59229cc233a66106c696534ac39be56093d8

Affected versions

0.*

0.6.0

0.9.1

0.9.10

0.9.11

0.9.12

0.9.13

0.9.14

0.9.15

0.9.16

0.9.17

0.9.18

0.9.19

0.9.2

0.9.20

0.9.21

0.9.22

0.9.23

0.9.24

0.9.25

0.9.26

0.9.27

0.9.28

0.9.29

0.9.3

0.9.30

0.9.31

0.9.32

0.9.33

0.9.34

0.9.35

0.9.36

0.9.37

0.9.38

0.9.39

0.9.4

0.9.40

0.9.41

0.9.42

0.9.5

0.9.6

0.9.7

0.9.8

0.9.9

1.*

1.0.0

1.0.1

1.0.2

1.0.3

1.0.4

1.0.5

1.0.6

1.1.0

1.1.1

1.1.2

1.1.3

1.2.0

1.2.1

1.2.2

1.2.3

1.2.4

1.2.5

1.2.6

1.2.7

1.3.0

1.3.1

1.3.2

1.3.3

1.3.4

1.4.0

1.4.1

1.4.2

1.4.3

1.4.4

1.4.5

1.4.6

1.4.7

1.4.8

1.5.0

1.5.1

1.6.0

1.6.1

1.6.2

1.6.3

1.7.0

1.7.1

1.7.2

1.7.3

1.7.4

1.7.5

1.7.6

1.7.7

1.8.0

1.8.1

1.8.2

1.8.3

1.8.4

1.8.5

1.8.6

1.8.7

1.8.8

1.9.0

10.*

10.0.0

10.0.1

10.1.0

10.2.0

10.3.0

10.4.0

11.*

11.0.0

11.0.1

11.1.0

11.2.0

11.2.1

11.3.0

11.3.1

11.3.2

11.3.3

11.4.0

11.4.1

11.4.2

11.4.3

11.4.4

11.4.5

11.5.0

11.5.1

12.*

12.0.0

12.1.0

12.2.0

2.*

2.0.0

2.0.1

2.0.2

2.1.0

2.1.1

2.1.2

2.1.3

2.2.0

2.3.0

2.3.1

2.4.0

2.5.0

2.5.1

2.5.2

2.5.3

2.6.0

2.6.1

2.6.2

2.6.3

2.6.4

2.6.5

2.6.6

2.6.7

2.6.8

2.7.0

2.7.1

2.7.2

2.7.3

2.7.4

2.8.0

2.8.1

2.8.2

2.9.0

2.9.1

3.*

3.0.0

3.1.0

3.1.1

3.1.2

3.2.0

3.3.0

3.3.1

3.3.2

3.4.0

4.*

4.0.0

4.0.1

4.1.0

4.2.0

4.2.1

4.3.0

4.4.0

4.4.1

5.*

5.0.0

5.0.1

5.1.0

5.2.0

5.3.0

5.3.1

6.*

6.0.0

7.*

7.0.0

7.0.1

7.1.0

7.2.0

7.3.0

8.*

8.0.0

8.0.1

8.1.0

8.1.1

8.2.0

8.2.1

8.2.2

8.3.0

8.3.1

8.4.0

8.5.0

9.*

9.0.0

Other

hb-rename

ng-mergepoint

ng-start

pango-extractpoint

pango-start

Database specific

source

"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-22693.json"