Use of Uninitialized Resource Affecting perf package, versions *


Severity

Recommended
low

Based on CentOS security rating.

Threat Intelligence

EPSS
0.18% (8th percentile)

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  • Snyk IDSNYK-CENTOS10-PERF-20716916
  • published10 Oct 2026
  • disclosed6 Oct 2026

Introduced: 6 Oct 2026

NewCVE-2026-98240  (opens in a new tab)
CWE-908  (opens in a new tab)

How to fix?

There is no fixed version for Centos:10 perf.

NVD Description

Note: Versions mentioned in the description apply only to the upstream perf package and not the perf package as distributed by Centos. See How to fix? for Centos:10 relevant fixed versions and status.

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

net: ip_tunnel: initialize options_len before referencing options

The following command triggers a kernel panic:

ip link add d0 type dummy; ip link set d0 up ip route add 10.30.0.0/16
encap ip id 300 geneve_opts 4660:66:11223344 dev d0

memcpy: detected buffer overflow: 4 byte write of buffer size 0 kernel BUG at lib/string_helpers.c:1044! ... ip_tun_parse_opts.part.0.cold+0x10/0x10 ip_tun_build_state+0x116/0x2a0

On kernels built with GCC 15+ and CONFIG_FORTIFY_SOURCE, the fortified memcpy() got 0 sized destination with request of 4 bytes length:

static int ip_tun_parse_opts_geneve(...) { ... attr = tb[LWTUNNEL_IP_OPT_GENEVE_DATA]; data_len = nla_len(attr); /* == 4 */

  struct geneve_opt *opt = ip_tunnel_info_opts(info) + opts_len;
  memcpy(opt->opt_data, nla_data(attr), data_len);
  /*     ^^^^^^^^^^^^^ 0 since options_len is assigned afterwards */

Fixed by initializing the counter before the options are referenced. Matching what tunnel_key_opts_set() already does.

CVSS Base Scores

version 3.1