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CVE-2026-98555

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

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.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version < fec0fe6838a7f45175667701fb51abb23a6ffb1e
Status affected
Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version < b859ba18b5a1067f71db5618c6a4a70d55fa308b
Status affected
Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version < 8b855b645841b5a04e20339a22bb6d593c9b790d
Status affected
Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version < d360b31f1a3666579422872aa7d1a751e20b76f9
Status affected
Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version < 060f827aa3dc47939ee306da715cd6700d129616
Status affected
Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version < 41dcae82bece9f106b4dff0ee777bba8d157c8a8
Status affected
Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version < cb3528ad8bb46fa6252f5d14ced7febddc18515d
Status affected
Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version < 72f9dd522f8d6c5a00be9695c7bb74631eb5069e
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 2.6.12
Status affected
Version 0
Version < 2.6.12
Status unaffected
Version <= 5.10.*
Version 5.10.271
Status unaffected
Version <= 5.15.*
Version 5.15.222
Status unaffected
Version <= 6.1.*
Version 6.1.189
Status unaffected
Version <= 6.6.*
Version 6.6.158
Status unaffected
Version <= 6.12.*
Version 6.12.112
Status unaffected
Version <= 6.18.*
Version 6.18.55
Status unaffected
Version <= 7.2.*
Version 7.2.9
Status unaffected
Version <= *
Version 7.3
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.21% 0.106
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/fec0fe6838a7f45175667701fb51abb23a6ffb1e
https://git.kernel.org/stable/c/b859ba18b5a1067f71db5618c6a4a70d55fa308b
https://git.kernel.org/stable/c/8b855b645841b5a04e20339a22bb6d593c9b790d
https://git.kernel.org/stable/c/d360b31f1a3666579422872aa7d1a751e20b76f9
https://git.kernel.org/stable/c/060f827aa3dc47939ee306da715cd6700d129616
https://git.kernel.org/stable/c/41dcae82bece9f106b4dff0ee777bba8d157c8a8
https://git.kernel.org/stable/c/cb3528ad8bb46fa6252f5d14ced7febddc18515d
https://git.kernel.org/stable/c/72f9dd522f8d6c5a00be9695c7bb74631eb5069e