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In the Linux kernel, the following vulnerability has been resolved:
llc: fix skb UAF and leaks on llc_mac_hdr_init() failure
In llc_conn_ac_resend_i_xxx_x_set_0_or_send_rr(), if llc_mac_hdr_init() fails, kfree_skb(skb) is called instead of kfree_skb(nskb). This leaks the newly allocated nskb, reads from the freed skb via LLC_I_GET_NR(pdu), and double-frees skb when llc_conn_state_process() drops its reference.
In llc_sap_action_send_xid_r() and llc_sap_action_send_test_r(), nskb is leaked if llc_mac_hdr_init() returns an error.
Free nskb in all three error paths.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linuxUpgrade linux-6.12 | Oct 28, 2026 | Oct 18, 2026 |
| Ubuntu | — | Upgrade linux-hwe-7.0Upgrade linux-oracleUpgrade linux-realtimeUpgrade linux-azure-5.15Upgrade linux-nvidiaUpgrade linux-intel-iotgUpgrade linux-azureUpgrade linux-riscv-5.15Upgrade linux-gcp-5.15Upgrade linux-oem-7.0Upgrade linux-intel-iotg-5.15Upgrade linux-ibmUpgrade linux-hwe-5.15Upgrade linux-fipsUpgrade linux-aws-5.15Upgrade linux-kvmUpgrade linux-bluefieldUpgrade linux-lowlatency-hwe-5.15Upgrade linux-riscvUpgrade linux-awsUpgrade linux-nvidia-tegra-igxUpgrade linux-gcpUpgrade linux-aws-fipsUpgrade linux-nvidia-tegra-5.15Upgrade linux-lowlatencyUpgrade linux-gcp-fipsUpgrade linux-intel-iot-realtimeUpgrade linux-gkeopUpgrade linux-ibm-5.15Upgrade linuxUpgrade linux-gkeUpgrade linux-nvidia-tegraUpgrade linux-oracle-5.15Upgrade linux-riscv-7.0Upgrade linux-azure-fipsUpgrade linux-azure-fde-5.15 | Nov 3, 2026 | Oct 18, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Oct 22, 2026 | Oct 18, 2026 |
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