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 hb_malloc returns NULL before using placement new to construct an object at the returned pointer address. When hb_malloc 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.

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-2b5249b4b6 advisory.

    Merge branch 'rawhide' into f43

    ----

    Upgrade to upstream 0.032 to fix CVE-2026-22693.

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 42 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-2a6cbb84d6 advisory.

    Upgrade to upstream. Eliminates distributing harfbuzz sources.

    ----

    Upgrade to upstream 0.032.

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 42 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-bac983cf83 advisory.

    Backport security fix for CVE-2026-22693 (fix RHBZ#2429278)

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2026:0287-1 advisory.

    - CVE-2026-22693: Fixed a NULL pointer dereference in SubtableUnicodesCache::create (bsc#1256459).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 42 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-2301995d0a advisory.

    Backport patch for CVE-2026-22693.

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-dc77eb63ae advisory.

    Backport patch for CVE-2026-22693.

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 43 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-b38fe572ef advisory.

    Backport security fix for CVE-2026-22693 (fix RHBZ#2429288)

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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 hb_malloc returns NULL before using placement new to construct an object at the returned     pointer address. When hb_malloc 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. (CVE-2026-22693)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
297101	Fedora 43 : perl-HarfBuzz-Shaper (2026-2b5249b4b6)	Nessus	Fedora Local Security Checks	high
297099	Fedora 42 : perl-HarfBuzz-Shaper (2026-2a6cbb84d6)	Nessus	Fedora Local Security Checks	high
296983	Fedora 42 : harfbuzz (2026-bac983cf83)	Nessus	Fedora Local Security Checks	medium
296665	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : harfbuzz (SUSE-SU-2026:0287-1)	Nessus	SuSE Local Security Checks	medium
296579	Fedora 42 : mingw-harfbuzz (2026-2301995d0a)	Nessus	Fedora Local Security Checks	medium
296548	Fedora 43 : mingw-harfbuzz (2026-dc77eb63ae)	Nessus	Fedora Local Security Checks	medium
291267	Fedora 43 : harfbuzz (2026-b38fe572ef)	Nessus	Fedora Local Security Checks	medium
282558	Linux Distros Unpatched Vulnerability : CVE-2026-22693	Nessus	Misc.	medium

Detections

Analytics

CVE-2026-22693

medium

Tenable Plugins

high

high

medium

medium

medium

medium

medium

medium