CVE-2022-48651

Advisory lineage Upstream: 0 Downstream: 167
Analyzed
Published: 28 Apr 2024, 13:00
Last modified:11 May 2026, 18:44

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.7 HIGH
v3.1 (cve.org)
EPSS Score
<0.01% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

28 Apr 2024, 13:00
Published
Vulnerability first disclosed
11 May 2026, 18:44
Last Modified
Vulnerability information updated

Description

In the Linux kernel, the following vulnerability has been resolved: ipvlan: Fix out-of-bound bugs caused by unset skb->mac_header If an AF_PACKET socket is used to send packets through ipvlan and the default xmit function of the AF_PACKET socket is changed from dev_queue_xmit() to packet_direct_xmit() via setsockopt() with the option name of PACKET_QDISC_BYPASS, the skb->mac_header may not be reset and remains as the initial value of 65535, this may trigger slab-out-of-bounds bugs as following: ================================================================= UG: KASAN: slab-out-of-bounds in ipvlan_xmit_mode_l2+0xdb/0x330 [ipvlan] PU: 2 PID: 1768 Comm: raw_send Kdump: loaded Not tainted 6.0.0-rc4+ #6 ardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-1.fc33 all Trace: print_address_description.constprop.0+0x1d/0x160 print_report.cold+0x4f/0x112 kasan_report+0xa3/0x130 ipvlan_xmit_mode_l2+0xdb/0x330 [ipvlan] ipvlan_start_xmit+0x29/0xa0 [ipvlan] __dev_direct_xmit+0x2e2/0x380 packet_direct_xmit+0x22/0x60 packet_snd+0x7c9/0xc40 sock_sendmsg+0x9a/0xa0 __sys_sendto+0x18a/0x230 __x64_sys_sendto+0x74/0x90 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd The root cause is: 1. packet_snd() only reset skb->mac_header when sock->type is SOCK_RAW and skb->protocol is not specified as in packet_parse_headers() 2. packet_direct_xmit() doesn't reset skb->mac_header as dev_queue_xmit() In this case, skb->mac_header is 65535 when ipvlan_xmit_mode_l2() is called. So when ipvlan_xmit_mode_l2() gets mac header with eth_hdr() which use "skb->head + skb->mac_header", out-of-bound access occurs. This patch replaces eth_hdr() with skb_eth_hdr() in ipvlan_xmit_mode_l2() and reset mac header in multicast to solve this out-of-bound bug.

CVSS Metrics

  • v3.1•HIGH•Score: 7.7CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

EPSS Trends

Current EPSS score: 0.00%• Percentile: 0%

Techniques & Countermeasures

  • CWE-125•Out-of-bounds Read

    The product reads data past the end, or before the beginning, of the intended buffer.

Affected Systems

  • linux•linux

    ≥ 2ad7bf3638411cb547f2823df08166c13ab04269, < e2b46cd5796f083e452fbc624f65b80328b0c1a4 | ≥ 2ad7bf3638411cb547f2823df08166c13ab04269, < 25efdbe5fe542c3063d1948cc4e98abcb57621ca | ≥ 2ad7bf3638411cb547f2823df08166c13ab04269, < bffcdade259c05ab3436b5fab711612093c275ef | ≥ 2ad7bf3638411cb547f2823df08166c13ab04269, < 346e94aa4a99378592c46d6a34c72703a32bd5be | ≥ 2ad7bf3638411cb547f2823df08166c13ab04269, < ab4a733874ead120691e8038272d22f8444d3638 | ≥ 2ad7bf3638411cb547f2823df08166c13ab04269, < 8d06006c7eb75587d986da46c48ba9274f94e8e7 | ≥ 2ad7bf3638411cb547f2823df08166c13ab04269, < b583e6b25bf9321c91154f6c78d2173ef12c4241 | ≥ 2ad7bf3638411cb547f2823df08166c13ab04269, < 81225b2ea161af48e093f58e8dfee6d705b16af4 | 3.19

  • linux•linux_kernel

    ≥ 3.19, < 4.9.330 | ≥ 4.10, < 4.14.295 | ≥ 4.15, < 4.19.260 | ≥ 4.20, < 5.4.215 | ≥ 5.5, < 5.10.146 | ≥ 5.11, < 5.15.71 | ≥ 5.16, < 5.19.12 | 6.0:rc1 | 6.0:rc2 | 6.0:rc3 | 6.0:rc4 | 6.0:rc5 | 6.0:rc6

References (8)