CVE-2023-52999

HIGH EPSS 13.1%
Published Mar 27, 20251y ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
High
Find Similar
Published Mar 27, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: net: fix UaF in netns ops registration error path If net_assign_generic() fails, the current error path in ops_init() tries to clear the gen pointer slot. Anyway, in such error path, the gen pointer itself has not been modified yet, and the existing and accessed one is smaller than the accessed index, causing an out-of-bounds error: BUG: KASAN: slab-out-of-bounds in ops_init+0x2de/0x320 Write of size 8 at addr ffff888109124978 by task modprobe/1018 CPU: 2 PID: 1018 Comm: modprobe Not tainted 6.2.0-rc2.mptcp_ae5ac65fbed5+ #1641 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.1-2.fc37 04/01/2014 Call Trace: <TASK> dump_stack_lvl+0x6a/0x9f print_address_description.constprop.0+0x86/0x2b5 print_report+0x11b/0x1fb kasan_report+0x87/0xc0 ops_init+0x2de/0x320 register_pernet_operations+0x2e4/0x750 register_pernet_subsys+0x24/0x40 tcf_register_action+0x9f/0x560 do_one_initcall+0xf9/0x570 do_init_module+0x190/0x650 load_module+0x1fa5/0x23c0 __do_sys_finit_module+0x10d/0x1b0 do_syscall_64+0x58/0x80 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f42518f778d Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d cb 56 2c 00 f7 d8 64 89 01 48 RSP: 002b:00007fff96869688 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 RAX: ffffffffffffffda RBX: 00005568ef7f7c90 RCX: 00007f42518f778d RDX: 0000000000000000 RSI: 00005568ef41d796 RDI: 0000000000000003 RBP: 00005568ef41d796 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000 R13: 00005568ef7f7d30 R14: 0000000000040000 R15: 0000000000000000 </TASK> This change addresses the issue by skipping the gen pointer de-reference in the mentioned error-path. Found by code inspection and verified with explicit error injection on a kasan-enabled kernel.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
13.1% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 12

VendorProductVersionRange
linuxlinux_kernel*≥4.19.264  –  <4.19.272
linuxlinux_kernel*≥5.4.223  –  <5.4.231
linuxlinux_kernel*≥5.10.153  –  <5.10.166
linuxlinux_kernel*≥5.15.77  –  <5.15.91
linuxlinux_kernel*≥6.1  –  <6.1.9
linuxlinux_kernel*≥6.1  –  <6.2
linuxlinux_kernel6.0.7any
linuxlinux_kernel6.2any
linuxlinux_kernel6.2any
linuxlinux_kernel6.2any
linuxlinux_kernel6.2any
linuxlinux_kernel6.2any

References 6

  • git.kernel.org https://git.kernel.org/stable/c/12075708f2e77ee6a9f8bb2cf512c38be3099794
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/66689a72ba73575e76d4f6a8748d3fa2690ec1c4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/71ab9c3e2253619136c31c89dbb2c69305cc89b1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ad0dfe9bcf0d78e699c7efb64c90ed062dc48bea
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d4c008f3b7f7d4ffd311eb2dae5e75b3cbddacd0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ddd49cbbd4c1ceb38032018b589b44208e54f55e
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/12075708f2e77ee6a9f8bb2cf512c38be3099794
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/66689a72ba73575e76d4f6a8748d3fa2690ec1c4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/71ab9c3e2253619136c31c89dbb2c69305cc89b1
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ad0dfe9bcf0d78e699c7efb64c90ed062dc48bea
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d4c008f3b7f7d4ffd311eb2dae5e75b3cbddacd0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ddd49cbbd4c1ceb38032018b589b44208e54f55e
    Patch