CVE-2026-98555

UNKNOWN 0.0

llc: fix skb UAF and leaks on llc_mac_hdr_init() failure

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

Vendor	linux
Product	linux
Ecosystems	Linux Kernel
Industries	Technology
Published	Oct 18, 2026

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Affected Versions

Linux / Linux

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < fec0fe6838a7f45175667701fb51abb23a6ffb1e 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b859ba18b5a1067f71db5618c6a4a70d55fa308b 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 8b855b645841b5a04e20339a22bb6d593c9b790d 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < d360b31f1a3666579422872aa7d1a751e20b76f9 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 060f827aa3dc47939ee306da715cd6700d129616 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 41dcae82bece9f106b4dff0ee777bba8d157c8a8 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < cb3528ad8bb46fa6252f5d14ced7febddc18515d 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 72f9dd522f8d6c5a00be9695c7bb74631eb5069e

Linux / Linux

2.6.12

References

NVD ↗ CVE.org ↗ EPSS Data ↗