In the Linux kernel, the following vulnerability has been resolved:
net: sched: cake: fix null pointer access issue when cake_init() fails
When the default qdisc is cake, if the qdisc of dev_queue fails to be inited during mqprio_init(), cake_reset() is invoked to clear resources. In this case, the tins is NULL, and it will cause gpf issue.
The process is as follows: qdisc_create_dflt() cake_init() q->tins = kvcalloc(...) --->failed, q->tins is NULL ... qdisc_put() ... cake_reset() ... cake_dequeue_one() b = &q->tins[...] --->q->tins is NULL
The following is the Call Trace information: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] RIP: 0010:cake_dequeue_one+0xc9/0x3c0 Call Trace: <TASK> cake_reset+0xb1/0x140 qdisc_reset+0xed/0x6f0 qdisc_destroy+0x82/0x4c0 qdisc_put+0x9e/0xb0 qdisc_create_dflt+0x2c3/0x4a0 mqprio_init+0xa71/0x1760 qdisc_create+0x3eb/0x1000 tc_modify_qdisc+0x408/0x1720 rtnetlink_rcv_msg+0x38e/0xac0 netlink_rcv_skb+0x12d/0x3a0 netlink_unicast+0x4a2/0x740 netlink_sendmsg+0x826/0xcc0 sock_sendmsg+0xc5/0x100 ____sys_sendmsg+0x583/0x690 ___sys_sendmsg+0xe8/0x160 __sys_sendmsg+0xbf/0x160 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7f89e5122d04 </TASK>
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade kernel-tools-debuginfoUpgrade kernel-livepatch-5.10.155-138.670Upgrade perfUpgrade kernel-toolsUpgrade kernel-develUpgrade bpftool-debuginfoUpgrade python-perfUpgrade perf-debuginfoUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-tools-develUpgrade kernel-debuginfoUpgrade bpftoolUpgrade kernelUpgrade python-perf-debuginfoUpgrade kernel-livepatch-5.15.79-51.138Upgrade kernel-headersUpgrade kernel-debuginfo-common-x86_64 | May 20, 2026 | May 20, 2026 |
| Debian | — | Upgrade linux | Oct 3, 2025 | Oct 3, 2025 |
| Redhat_linux | — | No solution exists | Jul 17, 2026 | Oct 1, 2025 |
| Ubuntu | — | Upgrade linux-hwe-5.15Upgrade linux-raspi-5.4Upgrade linux-awsUpgrade linux-azureUpgrade linux-ibm-5.4Upgrade linux-iotUpgrade linuxUpgrade linux-bluefieldUpgrade linux-gcp-5.4Upgrade linux-hwe-5.4Upgrade linux-gcp-fipsUpgrade linux-gcpUpgrade linux-aws-fipsUpgrade linux-azure-5.4Upgrade linux-intel-iotg-5.15Upgrade linux-lowlatency-hwe-5.15Upgrade linux-gcp-5.15Upgrade linux-aws-5.15Upgrade linux-xilinx-zynqmpUpgrade linux-oracle-5.15Upgrade linux-oracleUpgrade linux-azure-fipsUpgrade linux-raspiUpgrade linux-kvmUpgrade linux-azure-fdeUpgrade linux-nvidiaUpgrade linux-azure-5.15Upgrade linux-ibmUpgrade linux-fipsUpgrade linux-aws-5.4Upgrade linux-lowlatencyUpgrade linux-intel-iotgUpgrade linux-riscv-5.15Upgrade linux-gkeopUpgrade linux-oracle-5.4Upgrade linux-gkeUpgrade linux-realtime | Oct 10, 2025 | Oct 1, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 15, 2025 | Oct 1, 2025 |
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