Out-of-bounds Read Affecting perf package, versions <0:4.18.0-477.74.1.el8_8
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Test your applications- Snyk ID SNYK-RHEL8-PERF-8086727
- published 24 Sep 2024
- disclosed 2 Apr 2024
Introduced: 2 Apr 2024
CVE-2024-26665 Open this link in a new tabHow to fix?
Upgrade RHEL:8 perf to version 0:4.18.0-477.74.1.el8_8 or higher.
This issue was patched in RHSA-2024:6993.
NVD Description
Note: Versions mentioned in the description apply only to the upstream perf package and not the perf package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
tunnels: fix out of bounds access when building IPv6 PMTU error
If the ICMPv6 error is built from a non-linear skb we get the following splat,
BUG: KASAN: slab-out-of-bounds in do_csum+0x220/0x240 Read of size 4 at addr ffff88811d402c80 by task netperf/820 CPU: 0 PID: 820 Comm: netperf Not tainted 6.8.0-rc1+ #543 ... kasan_report+0xd8/0x110 do_csum+0x220/0x240 csum_partial+0xc/0x20 skb_tunnel_check_pmtu+0xeb9/0x3280 vxlan_xmit_one+0x14c2/0x4080 vxlan_xmit+0xf61/0x5c00 dev_hard_start_xmit+0xfb/0x510 __dev_queue_xmit+0x7cd/0x32a0 br_dev_queue_push_xmit+0x39d/0x6a0
Use skb_checksum instead of csum_partial who cannot deal with non-linear SKBs.
References
- https://access.redhat.com/security/cve/CVE-2024-26665
- https://git.kernel.org/stable/c/510c869ffa4068c5f19ff4df51d1e2f3a30aaac1
- https://git.kernel.org/stable/c/7dc9feb8b1705cf00de20563b6bc4831f4c99dab
- https://git.kernel.org/stable/c/d75abeec401f8c86b470e7028a13fcdc87e5dd06
- https://git.kernel.org/stable/c/d964dd1bc1452594b4207d9229c157d9386e5d8a
- https://git.kernel.org/stable/c/e37cde7a5716466ff2a76f7f27f0a29b05b9a732
- https://git.kernel.org/stable/c/e77bf828f1ca1c47fcff58bdc26b60a9d3dfbe1d
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html