5.5

CVE-2026-23064

net/sched: act_ife: avoid possible NULL deref

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

net/sched: act_ife: avoid possible NULL deref

tcf_ife_encode() must make sure ife_encode() does not return NULL.

syzbot reported:

Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
 RIP: 0010:ife_tlv_meta_encode+0x41/0xa0 net/ife/ife.c:166
CPU: 3 UID: 0 PID: 8990 Comm: syz.0.696 Not tainted syzkaller #0 PREEMPT(full)
Call Trace:
 <TASK>
  ife_encode_meta_u32+0x153/0x180 net/sched/act_ife.c:101
  tcf_ife_encode net/sched/act_ife.c:841 [inline]
  tcf_ife_act+0x1022/0x1de0 net/sched/act_ife.c:877
  tc_act include/net/tc_wrapper.h:130 [inline]
  tcf_action_exec+0x1c0/0xa20 net/sched/act_api.c:1152
  tcf_exts_exec include/net/pkt_cls.h:349 [inline]
  mall_classify+0x1a0/0x2a0 net/sched/cls_matchall.c:42
  tc_classify include/net/tc_wrapper.h:197 [inline]
  __tcf_classify net/sched/cls_api.c:1764 [inline]
  tcf_classify+0x7f2/0x1380 net/sched/cls_api.c:1860
  multiq_classify net/sched/sch_multiq.c:39 [inline]
  multiq_enqueue+0xe0/0x510 net/sched/sch_multiq.c:66
  dev_qdisc_enqueue+0x45/0x250 net/core/dev.c:4147
  __dev_xmit_skb net/core/dev.c:4262 [inline]
  __dev_queue_xmit+0x2998/0x46c0 net/core/dev.c:4798
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 4.11 < 5.10.249
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.199
Linux ≫ Linux Kernel Version >= 5.16 < 6.1.162
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.122
Linux ≫ Linux Kernel Version >= 6.7 < 6.12.68
Linux ≫ Linux Kernel Version >= 6.13 < 6.18.8
Linux ≫ Linux Kernel Version6.19 Updaterc1
Linux ≫ Linux Kernel Version6.19 Updaterc2
Linux ≫ Linux Kernel Version6.19 Updaterc3
Linux ≫ Linux Kernel Version6.19 Updaterc4
Linux ≫ Linux Kernel Version6.19 Updaterc5
Linux ≫ Linux Kernel Version6.19 Updaterc6
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.12% 0.024
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

https://git.kernel.org/stable/c/03710cebfc0bcfe247a9e04381e79ea33896e278
Patch
https://git.kernel.org/stable/c/374915dfc932adf57712df3be010667fd1190e3c
Patch
https://git.kernel.org/stable/c/6c75fed55080014545f262b7055081cec4768b20
Patch
https://git.kernel.org/stable/c/27880b0b0d35ad1c98863d09788254e36f874968
Patch
https://git.kernel.org/stable/c/1440d749fe49c8665da6f744323b1671d25a56a0
Patch
https://git.kernel.org/stable/c/4ef2c77851676b7ed106f0c47755bee9eeec9a40
Patch
https://git.kernel.org/stable/c/dd9442aedbeae87c44cc64c0ee41abd296dc008b
Patch