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VULNERABILITIES

CVE-2026-98555 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: kernel.orgCVSS-B:7.5 HIGHVector:CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://git.kernel.org/stable/c/060f827aa3dc47939ee306da715cd6700d129616 kernel.org
https://git.kernel.org/stable/c/41dcae82bece9f106b4dff0ee777bba8d157c8a8 kernel.org
https://git.kernel.org/stable/c/72f9dd522f8d6c5a00be9695c7bb74631eb5069e kernel.org
https://git.kernel.org/stable/c/8b855b645841b5a04e20339a22bb6d593c9b790d kernel.org
https://git.kernel.org/stable/c/b859ba18b5a1067f71db5618c6a4a70d55fa308b kernel.org

see all 8 references

Weakness Enumeration

No weakness enumeration is available for this CVE.

Affected Products

No affected product data is available for this CVE.

Change History

3 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-98555
NVD Published Date:
Oct 18, 2026
NVD Last Modified:
Oct 24, 2026
Source:
kernel.org
CVE-2026-98555 Details - Not Deferred