CVE WatchJul 22, 2026

CVE-2026-53910

diff3 tool from GNU diffutils is vulnerable to a heap‑based buffer overflow due to multiple signed integer overflows in line‑mapping calcula

CVSS

—

No CVSS

EPSS

—

KEV

—

Exploit Today

—

0-100

Published: Jul 22, 2026 · Last modified: Jul 22, 2026 · CWE-190

EPSS · 30d

Not enough EPSS history yet.

Technical description

diff3 tool from GNU diffutils is vulnerable to a heap‑based buffer overflow due to multiple signed integer overflows in line‑mapping calculations. Incorrect arithmetic in mapping line ranges can result in corrupted values being used for memory allocation and loop bounds. When processing crafted diff output, these overflows may cause the application to allocate insufficient memory and subsequently perform out‑of‑bounds writes during internal processing. An attacker who can control the output of the diff program used by diff3 (e.g. via --diff-program pointing to a malicious script) can trigger out-of-bounds writes, resulting in a crash and potentially remote code execution depending on the environment. This issue has been fixed in commit 9ff04d5b84743e331e80b589335a52c5480d1815

Official references

Related CVEs

CVECVSSEPSSKEVRExploitTitleMod.

CVE-2026-165172.9 LOW

—

——0A signed integer overflow vulnerability was found in libarchive's ZIP writer. In the archive_write_zip_header function in archive_write_set_format_zip.c, when ZIP encryption is enabled and the entry file size is close to INT64_MAX, the addition of the encryption overhead to the entry size overflows int64_t, resulting in undefined behavior. This could lead to incorrect Zip64 extension decisions or potential memory corruption.5h CVE-2026-16416—

—

——0Integer overflow in Chromecast in Google Chrome prior to 150.0.7871.182 allowed a local attacker to potentially perform a sandbox escape via malicious network traffic. (Chromium security severity: High)22h CVE-2026-47251—

—

——0libheif is a HEIF and AVIF file format decoder and encoder. The fix for CVE-2026-3949 (commit `b97c8b5`, PR #1712) introduced an integer overflow in the very security check it added. The check itself can be bypassed, allowing a crafted HEIF file with a VVC track to trigger the same out-of-bounds heap read that CVE-2026-3949 was meant to prevent. This is a separate, currently-unpatched vulnerability. Issue #1712 was closed as fixed without testing the edge case where `size` is near `UINT32_MAX`. Version 1.22.0 patches the issue.7h CVE-2026-477146.1 MED

—

——0libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and prior, the inline mask parsing code in `libheif/region.cc` contains an integer overflow. Both `width` and `height` are `unsigned int` (32-bit) values parsed from the HEIF file. Their product can exceed `UINT32_MAX`, wrapping to a small value before the division by 8. This causes an undersized buffer allocation, leading to out-of-bounds memory access when the mask data is later interpreted as a `width x height` bitmap. Version 1.22.0 patches the issue.7h CVE-2026-164089.8 CRI

—

——0Integer overflow in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 153.1d CVE-2026-163959.8 CRI

—

——0Integer overflow in the Audio/Video component. This vulnerability was fixed in Firefox 153.1d