by Kastro
Paper/Archive/CVE-2024-26665

CVE-2024-26665

Linux Linux — tunnels: fix out of bounds access when building IPv6 PMTU error

EPSS 0.7%CVSS 9.1
critical.is priorityof 100
38
CVSS 9.1 (CNA)9.1 / 10 × 3027.3Not in CISA KEV+300.0EPSS percentile 52.6.526 × 2010.5No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Linux4cb47a8644cc9eb8ec81190a50e79e6530d0297f – < e77bf828f1ca1c47fcff58bdc26b60a9d3dfbe1de77bf828f1ca1c47fcff58bdc26b60a9d3dfbe1dCNA
Linux4cb47a8644cc9eb8ec81190a50e79e6530d0297f – < d964dd1bc1452594b4207d9229c157d9386e5d8ad964dd1bc1452594b4207d9229c157d9386e5d8aCNA
Linux4cb47a8644cc9eb8ec81190a50e79e6530d0297f – < e37cde7a5716466ff2a76f7f27f0a29b05b9a732e37cde7a5716466ff2a76f7f27f0a29b05b9a732CNA
Linux4cb47a8644cc9eb8ec81190a50e79e6530d0297f – < 510c869ffa4068c5f19ff4df51d1e2f3a30aaac1510c869ffa4068c5f19ff4df51d1e2f3a30aaac1CNA
Linux4cb47a8644cc9eb8ec81190a50e79e6530d0297f – < 7dc9feb8b1705cf00de20563b6bc4831f4c99dab7dc9feb8b1705cf00de20563b6bc4831f4c99dabCNA
Linux4cb47a8644cc9eb8ec81190a50e79e6530d0297f – < d75abeec401f8c86b470e7028a13fcdc87e5dd06d75abeec401f8c86b470e7028a13fcdc87e5dd06CNA
Linux5.95.10.210CNA

Scores by source

Linux (CNA)9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: partial

References

refgit.kernel.org/stable/c/e77bf828f1ca1c47fcff58bdc26b60a9d3dfbe1drefgit.kernel.org/stable/c/d964dd1bc1452594b4207d9229c157d9386e5d8arefgit.kernel.org/stable/c/e37cde7a5716466ff2a76f7f27f0a29b05b9a732refgit.kernel.org/stable/c/510c869ffa4068c5f19ff4df51d1e2f3a30aaac1refgit.kernel.org/stable/c/7dc9feb8b1705cf00de20563b6bc4831f4c99dabrefgit.kernel.org/stable/c/d75abeec401f8c86b470e7028a13fcdc87e5dd06reflists.debian.org/debian-lts-announce/2024/06/msg00017.html