EUVD-2026-81949

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: RFCOMM: Validate MTU in rfcommapplypn to prevent infinite loop rfcommapplypn accepts the MTU value from a remote PN Parameter Negotiation frame without checking for zero. When the remote peer sends an MTU of zero, d-mt...

CVE-2026-90088

CVE-2026-90088 affects the Linux kernel Bluetooth RFCOMM subsystem. The function rfcomm_apply_pn() accepts an MTU value from a remote Parameter Negotiation (PN) frame without validating it against zero. When a remote peer sends an MTU of zero, the sendmsg path enters an infinite loop during data ...

CVE-2026-90075

In the Linux kernel , the fq_codel qdisc (net/sched) fails to clamp the default quantum and codel mtu derived from psched_mtu(). A device whose MTU wraps the value into the sign bit (e.g., a dummy device with max_mtu == 0 accepting MTU 2147483634) causes two distinct failures: (1) the signed flow...

EUVD-2026-81934

In the Linux kernel, the following vulnerability has been resolved: net/sched: hhf: clamp quantum before hhfchange to avoid overflow hhfinit sets q-quantum = pschedmtuqdiscdevsch with no overflow check. A device with a huge MTU e.g. dummy with maxmtu == 0 accepting MTU 2147483634 makes weight...

kernel: Linux kernel SLIP: Out-of-bounds write due to race condition during MTU change

A flaw was found in the Linux kernel's SLIP Serial Line Internet Protocol network component. A race condition exists during an MTU Maximum Transmission Unit change when the system reallocates receive buffers. This can allow a remote attacker to trigger an out-of-bounds write or write to a freed...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: bpf: Check skb-transportheader is set in bpfskbcheckmtu. The bpfskbcheckmtu helper needs to use skb-transportheader when the BPFMTUCHKSEGS flag is used: bpfskbcheckmtuskb, ifindex, &mtulen, 0, BPFMTUCHKSEGS. The transportheader i...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, Linux, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: batman-adv: Avoid infinite loops when trying to resize the local TT. If the MTU of one of the attached interfaces becomes too small to transmit the local translation table, then it must be resized to fit within all fragments when...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: net: Handling of integer overflows in kmallocreserve The committed change was as follows: c ptr = kmallocsize; if ptr size = ksizeptr; size = kmallocsizeroundupsize; ptr = kmallocsize; This caused various crashes, as reported ...

Linux Distros Unpatched Vulnerability : CVE-2026-89561

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - ipv6: rpl: fix NULL dereference of idev in ipv6rplsrhrcv ipv6rplsrhrcv dereferences idev from in6devget without a NULL check when reading idev-cnf.rplsegenabled...

CVE-2026-89561

A flaw was found in the Linux kernel's IPv6 Routing Protocol for Low-Power and Lossy Networks RPL implementation. A remote attacker could send specially crafted IPv6 packets to a vulnerable system while manipulating the network interface's Maximum Transmission Unit MTU, which defines the largest...

DEBIAN-CVE-2026-89561

In the Linux kernel, the following vulnerability has been resolved: ipv6: rpl: fix NULL dereference of idev in ipv6rplsrhrcv ipv6rplsrhrcv dereferences idev from in6devget without a NULL check when reading idev-cnf.rplsegenabled. When the device's MTU drops below IPV6MINMTU, addrconfifdown clears...

AZL-100190 CVE-2026-89561 affecting package kernel 6.6.150.1-1

In the Linux kernel, the following vulnerability has been resolved: ipv6: rpl: fix NULL dereference of idev in ipv6rplsrhrcv ipv6rplsrhrcv dereferences idev from in6devget without a NULL check when reading idev-cnf.rplsegenabled. When the device's MTU drops below IPV6MINMTU, addrconfifdown clears...

CVE-2026-89561

In the Linux kernel, the following vulnerability has been resolved: ipv6: rpl: fix NULL dereference of idev in ipv6rplsrhrcv ipv6rplsrhrcv dereferences idev from in6devget without a NULL check when reading idev-cnf.rplsegenabled. When the device's MTU drops below IPV6MINMTU, addrconfifdown clears...

UBUNTU-CVE-2026-89561

In the Linux kernel, the following vulnerability has been resolved: ipv6: rpl: fix NULL dereference of idev in ipv6rplsrhrcv ipv6rplsrhrcv dereferences idev from in6devget without a NULL check when reading idev-cnf.rplsegenabled. When the device's MTU drops below IPV6MINMTU, addrconfifdown clears...

CVE-2026-89561

In the Linux kernel, the following vulnerability has been resolved: ipv6: rpl: fix NULL dereference of idev in ipv6rplsrhrcv ipv6rplsrhrcv dereferences idev from in6devget without a NULL check when reading idev-cnf.rplsegenabled. When the device's MTU drops below IPV6MINMTU, addrconfifdown clears...

CVE-2026-89561

CVE-2026-89561 is a NULL pointer dereference in the Linux kernel's IPv6 RPL (Routing Protocol for Low-Power and Lossy Networks) implementation. The function ipv6_rpl_srh_rcv() dereferences idev obtained from __in6_dev_get() without a NULL check when reading idev->cnf.rpl_seg_enabled. The race ...

EUVD-2026-76472

In the Linux kernel, the following vulnerability has been resolved: ipv6: rpl: fix NULL dereference of idev in ipv6rplsrhrcv ipv6rplsrhrcv dereferences idev from in6devget without a NULL check when reading idev-cnf.rplsegenabled. When the device's MTU drops below IPV6MINMTU, addrconfifdown clears...

CVE-2026-89561

In the Linux kernel, the following vulnerability has been resolved: ipv6: rpl: fix NULL dereference of idev in ipv6rplsrhrcv ipv6rplsrhrcv dereferences idev from in6devget without a NULL check when reading idev-cnf.rplsegenabled. When the device's MTU drops below IPV6MINMTU, addrconfifdown clears...

CVE-2026-89561 ipv6: rpl: fix NULL dereference of idev in ipv6_rpl_srh_rcv()

In the Linux kernel, the following vulnerability has been resolved: ipv6: rpl: fix NULL dereference of idev in ipv6rplsrhrcv ipv6rplsrhrcv dereferences idev from in6devget without a NULL check when reading idev-cnf.rplsegenabled. When the device's MTU drops below IPV6MINMTU, addrconfifdown clears...

CVE-2026-89561 ipv6: rpl: fix NULL dereference of idev in ipv6_rpl_srh_rcv()

In the Linux kernel, the following vulnerability has been resolved: ipv6: rpl: fix NULL dereference of idev in ipv6rplsrhrcv ipv6rplsrhrcv dereferences idev from in6devget without a NULL check when reading idev-cnf.rplsegenabled. When the device's MTU drops below IPV6MINMTU, addrconfifdown clears...