7.8

CVE-2026-89789

gtp: add synchronize_net() in gtp_newlink() error path to prevent use-after-free

In the Linux kernel, the following vulnerability has been resolved:

gtp: add synchronize_net() in gtp_newlink() error path to prevent use-after-free

gtp_newlink()'s error path frees tid_hash and addr_hash without
waiting for an RCU grace period after clearing sk_user_data. A
concurrent gtp_encap_recv() in softirq may still hold the gtp_dev
pointer obtained via rcu_dereference_sk_user_data() and access the
freed memory.

  BUG: KASAN: slab-use-after-free in gtp0_pdp_find+0x1f6/0x200 (gtp.c:152)
  Call Trace:
   <IRQ>
   gtp0_pdp_find+0x1f6/0x200
   gtp_encap_recv+0x527/0x24b0
   udp_queue_rcv_one_skb+0x75f/0xc10

Add synchronize_net() before the kfree calls in out_hashtable, which
covers all error paths from both gtp_encap_enable() and
gtp_create_sockets().
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version 459aa660eb1d8ce67080da1983bb81d716aa5a69
Version < fcafb2b1430824bae4258c01a439ec97ca0c6973
Status affected
Version 459aa660eb1d8ce67080da1983bb81d716aa5a69
Version < 3ca3da5c305caa873ddb81e8c6b118143f6dd3d1
Status affected
Version 459aa660eb1d8ce67080da1983bb81d716aa5a69
Version < 6f815c2fb6ab20385f81c353cdad0ea3b88132af
Status affected
Version 459aa660eb1d8ce67080da1983bb81d716aa5a69
Version < e3b9aa0773abd5d4ed90be41ce5306c146d5b09e
Status affected
Version 459aa660eb1d8ce67080da1983bb81d716aa5a69
Version < fd8396cfecbd904468c71362f08aaa25f96d5337
Status affected
Version 459aa660eb1d8ce67080da1983bb81d716aa5a69
Version < 7677eb2cbf2cc7446de474c01a6b06277c0051e5
Status affected
Version 459aa660eb1d8ce67080da1983bb81d716aa5a69
Version < 8d85498016a5bb56339734a14c276209fa65bafc
Status affected
Version 459aa660eb1d8ce67080da1983bb81d716aa5a69
Version < d989e22ae9802c52c56ad4284d0caf26696cf6ae
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 4.7
Status affected
Version 0
Version < 4.7
Status unaffected
Version <= 5.10.*
Version 5.10.270
Status unaffected
Version <= 5.15.*
Version 5.15.221
Status unaffected
Version <= 6.1.*
Version 6.1.188
Status unaffected
Version <= 6.6.*
Version 6.6.157
Status unaffected
Version <= 6.12.*
Version 6.12.110
Status unaffected
Version <= 6.18.*
Version 6.18.52
Status unaffected
Version <= 7.2.*
Version 7.2.6
Status unaffected
Version <= *
Version 7.3-rc1
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% 0.114
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
416baaa9-dc9f-4396-8d5f-8c081fb06d67 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/fcafb2b1430824bae4258c01a439ec97ca0c6973
https://git.kernel.org/stable/c/3ca3da5c305caa873ddb81e8c6b118143f6dd3d1
https://git.kernel.org/stable/c/6f815c2fb6ab20385f81c353cdad0ea3b88132af
https://git.kernel.org/stable/c/e3b9aa0773abd5d4ed90be41ce5306c146d5b09e
https://git.kernel.org/stable/c/fd8396cfecbd904468c71362f08aaa25f96d5337
https://git.kernel.org/stable/c/7677eb2cbf2cc7446de474c01a6b06277c0051e5
https://git.kernel.org/stable/c/8d85498016a5bb56339734a14c276209fa65bafc
https://git.kernel.org/stable/c/d989e22ae9802c52c56ad4284d0caf26696cf6ae