CVE-2025-56352

In tinyMQTT commit 6226ade15bd4f97be2d196352e64dd10937c1962 2024-02-18, the broker mishandles protocol violations during CONNECT packet parsing. When receiving a CONNECT packet with a zero-length Client ID while CleanSession is set to 0, the broker correctly replies with a CONNACK return code 0x0...

CVE-2025-56352

CVE-2025-56352 affects the tinyMQTT broker. When processing a CONNECT packet with a zero-length Client ID and CleanSession=0, the broker returns CONNACK 0x02 (Identifier Rejected) but fails to explicitly close the TCP connection, leaving the socket open. Repeated invalid CONNECT attempts can exha...

EUVD-2025-209887

In tinyMQTT commit 6226ade15bd4f97be2d196352e64dd10937c1962 2024-02-18, the broker mishandles protocol violations during CONNECT packet parsing. When receiving a CONNECT packet with a zero-length Client ID while CleanSession is set to 0, the broker correctly replies with a CONNACK return code 0x0...

CLSA-2026-1778944149 libsoup: Fix of CVE-2026-2369

CVE-2026-2369: fix integer underflow in sniffunknown on zero-length buffer that caused an out-of-bounds read in the content sniffer...

CLSA-2026-1778894153 libarchive: Fix of CVE-2025-60753

CVE-2025-60753: denial of service in bsdtar -s substitution when the regular expression matches a zero-length string, causing an infinite loop in applysubstitution...

CLSA-2026-1778893359 libarchive: Fix of CVE-2025-60753

CVE-2025-60753: denial of service in bsdtar -s substitution when the regular expression matches a zero-length string, causing an infinite loop in applysubstitution...

CVE-2026-44699

LibJWT is a C JSON Web Token Library. From 3.0.0 to 3.3.2, libjwt accepts an RSA JWK that does not contain an alg parameter as the verification key for an HS256/HS384/HS512 token. In the OpenSSL backend, this causes HMAC verification to run with a zero-length key, so an attacker can forge a valid...

CVE-2026-44699

LibJWT is a C JSON Web Token Library. From 3.0.0 to 3.3.2, libjwt accepts an RSA JWK that does not contain an alg parameter as the verification key for an HS256/HS384/HS512 token. In the OpenSSL backend, this causes HMAC verification to run with a zero-length key, so an attacker can forge a valid...

CLSA-2026-1778772686 libsoup: Fix of CVE-2026-2369

CVE-2026-2369: fix integer underflow in sniffunknown on zero-length buffer that caused an out-of-bounds read in the content sniffer...

CLSA-2026-1778662869 libsoup: Fix of CVE-2026-2369

CVE-2026-2369: fix integer underflow in sniffunknown on zero-length buffer that caused an out-of-bounds read in the content sniffer...

CVE-2026-4890

A denial of service vulnerability was discovered in dnsmasq's DNSSEC validation. When parsing NSEC and NSEC3 bitmap records, the window iteration logic fails to account for the 2-byte window header when advancing through the bitmap data. A specially crafted DNS response with a zero-length bitmap...

kernel: out-of-bound read in memcpy_fromiovecend()

A flaw was found in the Linux kernel that allows the userspace to call memcpyfromiovecend and similar functions with a zero offset and buffer length. This can cause a read beyond the buffer boundaries flaw and, in certain cases, cause a memory access fault and a system halt by accessing invalid...

Gnutls: gnutls: denial of service via dtls zero-length fragment

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CVE-2026-43244

A flaw was found in the Linux kernel's Kernel Connection Multiplexer KCM module. A local user could trigger an issue where, during partial sendmsg operations, an empty network buffer skb is incorrectly left in the fraglist. A subsequent zero-length write operation can then cause a kernel warning,...

fast-jwt: JWT auth bypass due to empty HMAC secret accepted by async key resolver

Summary A critical authentication-bypass vulnerability in fast-jwt's async key-resolver flow allows any unauthenticated attacker to forge arbitrary JWTs that are accepted as authentic. When the application's key resolver returns an empty string '', for example via the common keysdecoded.header.ki...

CVE-2026-43187

A flaw was found in the Linux kernel's XFS filesystem. Incorrect handling of freemap entries when deleting attribute leaf freemap entries can lead to a situation where zero-length freemap entries with a non-zero base are left behind. Subsequent setxattr operations can cause these entries to overl...

CLSA-2026-1778068747 Fix CVE(s): CVE-2026-0966

SECURITY UPDATE: heap buffer underflow in sshgethexa on zero-length or NULL input, remotely reachable via GSSAPI authentication logging - debian/patches/CVE-2026-0966.patch: reject NULL/zero-length input in sshgethexa in src/dh.c - CVE-2026-0966: fix heap buffer underflow in sshgethexa...

CLSA-2026-1778068515 Fix CVE(s): CVE-2026-0966

SECURITY UPDATE: heap buffer underflow in sshgethexa on zero-length or NULL input, remotely reachable via GSSAPI authentication logging - debian/patches/CVE-2026-0966.patch: reject NULL/zero-length input in sshgethexa in src/dh.c - CVE-2026-0966: fix heap buffer underflow in sshgethexa...

SUSE CVE-2026-43005

In the Linux kernel, the following vulnerability has been resolved: hwmon: tps53679 Fix array access with zero-length block read i2csmbusreadblockdata can return 0, indicating a zero-length read. When this happens, tps53679identifychip accesses bufret - 1 which is buf-1, reading one byte before t...

SUSE CVE-2026-43006

In the Linux kernel, the following vulnerability has been resolved: iouring/rsrc: reject zero-length fixed buffer import validatefixedrange admits bufaddr at the exact end of the registered region when len is zero, because the check uses strict greater-than bufend imu-ubuf + imu-len. ioimportfixe...