| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2024-26665: tunnels: fix out of bounds access when building IPv6 PMTU error |
| |
| Description |
| =========== |
| |
| 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. |
| |
| The Linux kernel CVE team has assigned CVE-2024-26665 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.9 with commit 4cb47a8644cc9eb8ec81190a50e79e6530d0297f and fixed in 5.10.210 with commit e77bf828f1ca1c47fcff58bdc26b60a9d3dfbe1d |
| Issue introduced in 5.9 with commit 4cb47a8644cc9eb8ec81190a50e79e6530d0297f and fixed in 5.15.149 with commit d964dd1bc1452594b4207d9229c157d9386e5d8a |
| Issue introduced in 5.9 with commit 4cb47a8644cc9eb8ec81190a50e79e6530d0297f and fixed in 6.1.78 with commit e37cde7a5716466ff2a76f7f27f0a29b05b9a732 |
| Issue introduced in 5.9 with commit 4cb47a8644cc9eb8ec81190a50e79e6530d0297f and fixed in 6.6.17 with commit 510c869ffa4068c5f19ff4df51d1e2f3a30aaac1 |
| Issue introduced in 5.9 with commit 4cb47a8644cc9eb8ec81190a50e79e6530d0297f and fixed in 6.7.5 with commit 7dc9feb8b1705cf00de20563b6bc4831f4c99dab |
| Issue introduced in 5.9 with commit 4cb47a8644cc9eb8ec81190a50e79e6530d0297f and fixed in 6.8 with commit d75abeec401f8c86b470e7028a13fcdc87e5dd06 |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2024-26665 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| net/ipv4/ip_tunnel_core.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/e77bf828f1ca1c47fcff58bdc26b60a9d3dfbe1d |
| https://git.kernel.org/stable/c/d964dd1bc1452594b4207d9229c157d9386e5d8a |
| https://git.kernel.org/stable/c/e37cde7a5716466ff2a76f7f27f0a29b05b9a732 |
| https://git.kernel.org/stable/c/510c869ffa4068c5f19ff4df51d1e2f3a30aaac1 |
| https://git.kernel.org/stable/c/7dc9feb8b1705cf00de20563b6bc4831f4c99dab |
| https://git.kernel.org/stable/c/d75abeec401f8c86b470e7028a13fcdc87e5dd06 |
