Answer in brief
CVE-2026-98555 records a High severity (CVSS 7.5) vulnerability in llc: fix skb UAF and leaks on llc_mac_hdr_init() failure. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fec0fe6838a7f45175667701fb51abb23a6ffb1e || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b859ba18b5a1067f71db5618c6a4a70d55fa308b || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8b855b645841b5a04e20339a22bb6d593c9b790d || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d360b31f1a3666579422872aa7d1a751e20b76f9 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <060f827aa3dc47939ee306da715cd6700d129616 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <41dcae82bece9f106b4dff0ee777bba8d157c8a8 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cb3528ad8bb46fa6252f5d14ced7febddc18515d || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <72f9dd522f8d6c5a00be9695c7bb74631eb5069e | fec0fe6838a7f45175667701fb51abb23a6ffb1e, b859ba18b5a1067f71db5618c6a4a70d55fa308b, 8b855b645841b5a04e20339a22bb6d593c9b790d, d360b31f1a3666579422872aa7d1a751e20b76f9, 060f827aa3dc47939ee306da715cd6700d129616, 41dcae82bece9f106b4dff0ee777bba8d157c8a8, cb3528ad8bb46fa6252f5d14ced7febddc18515d, 72f9dd522f8d6c5a00be9695c7bb74631eb5069e |
| Linux/Linuxgeneric | 2.6.12 | Not reported |
Published upstream
Oct 18, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 18, 2026
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.
Quoted source text, attributed separately from HOL analysis.