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CVE-2026-58090

Use-after-free in unix SOCK_STREAM message handling

The SOCK_STREAM receive path in the unix socket implementation failed to fully detach control messages from the socket buffer before processing them. Some error paths would free those messages, leaving freed data mbufs in the receive socket buffer. An unprivileged local user can exploit this use-after-free to escalate privileges.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Freebsd
Products
Freebsd
CVE-2026-58091

Kernel use-after-free via the SNDCTL_DSP_SYNCSTART ioctl

The implementation of this ioctl attempts to acquire locks on all channels in a sync group. If locking a channel would block, it releases the sync group list lock and sleeps. Upon reawakening, it is possible that the sync group structure is freed, but the implementation did not handle this possibility. On a system with a multiple audio devices, an unprivileged local user can exploit this use-after-free to escalate privileges.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Freebsd
Products
Freebsd
CVE-2026-58093

Kernel use-after-free via tty ioctls

The TIOCSCTTY ioctl handler drops the tty lock in order to acquire the process tree lock. After reacquiring the tty lock, the handler did not revalidate the state of the terminal, and could proceed to link a terminal that was concurrently being destroyed to the calling process' session. An unprivileged local user can exploit this race condition to escalate privileges.

CVSS 3.1 · 7 High EPSS < 1% KEV · Not listed
Vendors
Freebsd
Products
Freebsd
CVE-2026-78227

Use-after-free in DoQ stream output buffer on reset re-transmission

NLnet Labs Unbound 1.22.0 up to and including 1.26.1, has a use-after-free vulnerability when compiled for DNS-over-QUIC support with '--with-libngtcp2'. Each DoQ stream owns an output buffer that holds the DNS response. ngtcp2's retransmission buffer keeps a shallow pointer into the output buffer for as long as a STREAM frame may be resent. On a client RESET_STREAM, the output buffer is freed but ngtcp2 still holds the matching retransmission entries. The next PTO timeout makes ngtcp2 re-encode the STREAM frame and copy from the freed buffer. A malicious actor that can query Unbound over DoQ and that withholds ACKs, sends RESET_STREAM, and waits for PTO, reaches this use-after-free with no privilege. This leads to retransmissions against freed memory and eventually an abnormal server exit under a 20-query spray.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Vendors
Nlnetlabs
Products
Unbound
CVE-2026-82720

Use-after-free in DoH stream cleanup code path

NLnet Labs Unbound 1.12.0 up to and including 1.26.0 has a use-after-free vulnerability when compiled for DNS-over-HTTPs support with '--with-libnghttp2'. During failure code paths (i.e., RPZ drop query, jostle due to heavy traffic), a dropped DoH stream brings down the whole DoH session and does not account properly for other DoH streams in the same session. This leads to use-after-free in those code paths. If the prerequisites are satisfied (possible RPZ drop or heavy client traffic), a malicious actor can trigger the vulnerability with a single DoH connection and the appropriate traffic. Impact is limited as the reads are not user controlled and the use-after-free leads to early returns. However, a hardened allocator can catch the use-after-free and controllably terminate the process resulting to denial of service.

CVSS 3.1 · 5.9 Medium EPSS < 1% KEV · Not listed
Vendors
Nlnetlabs
Products
Unbound
CVE-2026-0163

Use‑After‑Free in Android vpu_ioctl Enables Remote Privilege Escalation without User Interaction

In multiple functions of vpu_ioctl.c, there is a possible use after free due to a use after free. This could lead to remote escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
Vendors
Google
Products
Android
CVE-2026-93586

ImageMagick before 7.1.2-31 Use After Free via ImagesToBlob

ImageMagick before 7.1.2-31 and before 6.9.13-56 contains a use-after-free vulnerability in the ImagesToBlob method, caused by a pointer that is not updated correctly. Exploitation may result in a limited availability impact (e.g., a crash of the affected process). The issue is fixed in versions 7.1.2-31 and 6.9.13-56.

CVSS 4.0 · 2.1 Low EPSS < 1% KEV · Not listed
Vendors
Imagemagick
Products
Imagemagick
CVE-2026-94055

exim: gnutls: Exim: Use-after-free vulnerability in GnuTLS TLS settings leading to denial of service

Exim before 4.100.1, when certain non-default TLS settings are used with GnuTLS, has a use-after-free.

CVSS 3.1 · 3.7 Low EPSS < 1% KEV · Not listed
Vendors
Exim
Products
Exim