CVE-2024-40958 (GCVE-0-2024-40958)
Vulnerability from cvelistv5
Published
2024-07-12 12:32
Modified
2025-11-03 21:58
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: netns: Make get_net_ns() handle zero refcount net Syzkaller hit a warning: refcount_t: addition on 0; use-after-free. WARNING: CPU: 3 PID: 7890 at lib/refcount.c:25 refcount_warn_saturate+0xdf/0x1d0 Modules linked in: CPU: 3 PID: 7890 Comm: tun Not tainted 6.10.0-rc3-00100-gcaa4f9578aba-dirty #310 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 RIP: 0010:refcount_warn_saturate+0xdf/0x1d0 Code: 41 49 04 31 ff 89 de e8 9f 1e cd fe 84 db 75 9c e8 76 26 cd fe c6 05 b6 41 49 04 01 90 48 c7 c7 b8 8e 25 86 e8 d2 05 b5 fe 90 <0f> 0b 90 90 e9 79 ff ff ff e8 53 26 cd fe 0f b6 1 RSP: 0018:ffff8881067b7da0 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff811c72ac RDX: ffff8881026a2140 RSI: ffffffff811c72b5 RDI: 0000000000000001 RBP: ffff8881067b7db0 R08: 0000000000000000 R09: 205b5d3730353139 R10: 0000000000000000 R11: 205d303938375420 R12: ffff8881086500c4 R13: ffff8881086500c4 R14: ffff8881086500b0 R15: ffff888108650040 FS: 00007f5b2961a4c0(0000) GS:ffff88823bd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055d7ed36fd18 CR3: 00000001482f6000 CR4: 00000000000006f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> ? show_regs+0xa3/0xc0 ? __warn+0xa5/0x1c0 ? refcount_warn_saturate+0xdf/0x1d0 ? report_bug+0x1fc/0x2d0 ? refcount_warn_saturate+0xdf/0x1d0 ? handle_bug+0xa1/0x110 ? exc_invalid_op+0x3c/0xb0 ? asm_exc_invalid_op+0x1f/0x30 ? __warn_printk+0xcc/0x140 ? __warn_printk+0xd5/0x140 ? refcount_warn_saturate+0xdf/0x1d0 get_net_ns+0xa4/0xc0 ? __pfx_get_net_ns+0x10/0x10 open_related_ns+0x5a/0x130 __tun_chr_ioctl+0x1616/0x2370 ? __sanitizer_cov_trace_switch+0x58/0xa0 ? __sanitizer_cov_trace_const_cmp2+0x1c/0x30 ? __pfx_tun_chr_ioctl+0x10/0x10 tun_chr_ioctl+0x2f/0x40 __x64_sys_ioctl+0x11b/0x160 x64_sys_call+0x1211/0x20d0 do_syscall_64+0x9e/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5b28f165d7 Code: b3 66 90 48 8b 05 b1 48 2d 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 81 48 2d 00 8 RSP: 002b:00007ffc2b59c5e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5b28f165d7 RDX: 0000000000000000 RSI: 00000000000054e3 RDI: 0000000000000003 RBP: 00007ffc2b59c650 R08: 00007f5b291ed8c0 R09: 00007f5b2961a4c0 R10: 0000000029690010 R11: 0000000000000246 R12: 0000000000400730 R13: 00007ffc2b59cf40 R14: 0000000000000000 R15: 0000000000000000 </TASK> Kernel panic - not syncing: kernel: panic_on_warn set ... This is trigger as below: ns0 ns1 tun_set_iff() //dev is tun0 tun->dev = dev //ip link set tun0 netns ns1 put_net() //ref is 0 __tun_chr_ioctl() //TUNGETDEVNETNS net = dev_net(tun->dev); open_related_ns(&net->ns, get_net_ns); //ns1 get_net_ns() get_net() //addition on 0 Use maybe_get_net() in get_net_ns in case net's ref is zero to fix this
References
Impacted products
Vendor Product Version
Linux Linux Version: 0c3e0e3bb623c3735b8c9ab8aa8332f944f83a9f
Version: 0c3e0e3bb623c3735b8c9ab8aa8332f944f83a9f
Version: 0c3e0e3bb623c3735b8c9ab8aa8332f944f83a9f
Version: 0c3e0e3bb623c3735b8c9ab8aa8332f944f83a9f
Version: 0c3e0e3bb623c3735b8c9ab8aa8332f944f83a9f
Version: 0c3e0e3bb623c3735b8c9ab8aa8332f944f83a9f
Version: 0c3e0e3bb623c3735b8c9ab8aa8332f944f83a9f
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetns: Make get_net_ns() handle zero refcount net\n\nSyzkaller hit a warning:\nrefcount_t: addition on 0; use-after-free.\nWARNING: CPU: 3 PID: 7890 at lib/refcount.c:25 refcount_warn_saturate+0xdf/0x1d0\nModules linked in:\nCPU: 3 PID: 7890 Comm: tun Not tainted 6.10.0-rc3-00100-gcaa4f9578aba-dirty #310\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014\nRIP: 0010:refcount_warn_saturate+0xdf/0x1d0\nCode: 41 49 04 31 ff 89 de e8 9f 1e cd fe 84 db 75 9c e8 76 26 cd fe c6 05 b6 41 49 04 01 90 48 c7 c7 b8 8e 25 86 e8 d2 05 b5 fe 90 \u003c0f\u003e 0b 90 90 e9 79 ff ff ff e8 53 26 cd fe 0f b6 1\nRSP: 0018:ffff8881067b7da0 EFLAGS: 00010286\nRAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff811c72ac\nRDX: ffff8881026a2140 RSI: ffffffff811c72b5 RDI: 0000000000000001\nRBP: ffff8881067b7db0 R08: 0000000000000000 R09: 205b5d3730353139\nR10: 0000000000000000 R11: 205d303938375420 R12: ffff8881086500c4\nR13: ffff8881086500c4 R14: ffff8881086500b0 R15: ffff888108650040\nFS:  00007f5b2961a4c0(0000) GS:ffff88823bd00000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 000055d7ed36fd18 CR3: 00000001482f6000 CR4: 00000000000006f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n \u003cTASK\u003e\n ? show_regs+0xa3/0xc0\n ? __warn+0xa5/0x1c0\n ? refcount_warn_saturate+0xdf/0x1d0\n ? report_bug+0x1fc/0x2d0\n ? refcount_warn_saturate+0xdf/0x1d0\n ? handle_bug+0xa1/0x110\n ? exc_invalid_op+0x3c/0xb0\n ? asm_exc_invalid_op+0x1f/0x30\n ? __warn_printk+0xcc/0x140\n ? __warn_printk+0xd5/0x140\n ? refcount_warn_saturate+0xdf/0x1d0\n get_net_ns+0xa4/0xc0\n ? __pfx_get_net_ns+0x10/0x10\n open_related_ns+0x5a/0x130\n __tun_chr_ioctl+0x1616/0x2370\n ? __sanitizer_cov_trace_switch+0x58/0xa0\n ? __sanitizer_cov_trace_const_cmp2+0x1c/0x30\n ? __pfx_tun_chr_ioctl+0x10/0x10\n tun_chr_ioctl+0x2f/0x40\n __x64_sys_ioctl+0x11b/0x160\n x64_sys_call+0x1211/0x20d0\n do_syscall_64+0x9e/0x1d0\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\nRIP: 0033:0x7f5b28f165d7\nCode: b3 66 90 48 8b 05 b1 48 2d 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 b8 10 00 00 00 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 8b 0d 81 48 2d 00 8\nRSP: 002b:00007ffc2b59c5e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010\nRAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5b28f165d7\nRDX: 0000000000000000 RSI: 00000000000054e3 RDI: 0000000000000003\nRBP: 00007ffc2b59c650 R08: 00007f5b291ed8c0 R09: 00007f5b2961a4c0\nR10: 0000000029690010 R11: 0000000000000246 R12: 0000000000400730\nR13: 00007ffc2b59cf40 R14: 0000000000000000 R15: 0000000000000000\n \u003c/TASK\u003e\nKernel panic - not syncing: kernel: panic_on_warn set ...\n\nThis is trigger as below:\n          ns0                                    ns1\ntun_set_iff() //dev is tun0\n   tun-\u003edev = dev\n//ip link set tun0 netns ns1\n                                       put_net() //ref is 0\n__tun_chr_ioctl() //TUNGETDEVNETNS\n   net = dev_net(tun-\u003edev);\n   open_related_ns(\u0026net-\u003ens, get_net_ns); //ns1\n     get_net_ns()\n        get_net() //addition on 0\n\nUse maybe_get_net() in get_net_ns in case net\u0027s ref is zero to fix this"
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  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/3a6cd326ead7c8bb1f64486789a01974a9f1ad55\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/2b82028a1f5ee3a8e04090776b10c534144ae77b\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/cb7f811f638a14590ff98f53c6dd1fb54627d940\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/1b631bffcb2c09551888f3c723f4365c91fe05ef\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/ef0394ca25953ea0eddcc82feae1f750451f1876\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/3af28df0d883e8c89a29ac31bc65f9023485743b\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/ff960f9d3edbe08a736b5a224d91a305ccc946b0\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T04:39:55.927Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-40958\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T17:03:35.616951Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:22.411Z\"}}], \"cna\": {\"title\": \"netns: Make get_net_ns() handle zero refcount net\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"0c3e0e3bb623\", \"lessThan\": \"3a6cd326ead7\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0c3e0e3bb623\", \"lessThan\": \"2b82028a1f5e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0c3e0e3bb623\", \"lessThan\": \"cb7f811f638a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0c3e0e3bb623\", \"lessThan\": \"1b631bffcb2c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0c3e0e3bb623\", \"lessThan\": \"ef0394ca2595\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0c3e0e3bb623\", \"lessThan\": \"3af28df0d883\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"0c3e0e3bb623\", \"lessThan\": \"ff960f9d3edb\", \"versionType\": \"git\"}], \"programFiles\": [\"net/core/net_namespace.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.2\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.2\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.4.279\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.221\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.162\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.96\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.36\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.9.7\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.9.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/core/net_namespace.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/3a6cd326ead7c8bb1f64486789a01974a9f1ad55\"}, {\"url\": \"https://git.kernel.org/stable/c/2b82028a1f5ee3a8e04090776b10c534144ae77b\"}, {\"url\": \"https://git.kernel.org/stable/c/cb7f811f638a14590ff98f53c6dd1fb54627d940\"}, {\"url\": \"https://git.kernel.org/stable/c/1b631bffcb2c09551888f3c723f4365c91fe05ef\"}, {\"url\": \"https://git.kernel.org/stable/c/ef0394ca25953ea0eddcc82feae1f750451f1876\"}, {\"url\": \"https://git.kernel.org/stable/c/3af28df0d883e8c89a29ac31bc65f9023485743b\"}, {\"url\": \"https://git.kernel.org/stable/c/ff960f9d3edbe08a736b5a224d91a305ccc946b0\"}], \"x_generator\": {\"engine\": \"bippy-9e1c9544281a\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnetns: Make get_net_ns() handle zero refcount net\\n\\nSyzkaller hit a warning:\\nrefcount_t: addition on 0; use-after-free.\\nWARNING: CPU: 3 PID: 7890 at lib/refcount.c:25 refcount_warn_saturate+0xdf/0x1d0\\nModules linked in:\\nCPU: 3 PID: 7890 Comm: tun Not tainted 6.10.0-rc3-00100-gcaa4f9578aba-dirty #310\\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014\\nRIP: 0010:refcount_warn_saturate+0xdf/0x1d0\\nCode: 41 49 04 31 ff 89 de e8 9f 1e cd fe 84 db 75 9c e8 76 26 cd fe c6 05 b6 41 49 04 01 90 48 c7 c7 b8 8e 25 86 e8 d2 05 b5 fe 90 \u003c0f\u003e 0b 90 90 e9 79 ff ff ff e8 53 26 cd fe 0f b6 1\\nRSP: 0018:ffff8881067b7da0 EFLAGS: 00010286\\nRAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff811c72ac\\nRDX: ffff8881026a2140 RSI: ffffffff811c72b5 RDI: 0000000000000001\\nRBP: ffff8881067b7db0 R08: 0000000000000000 R09: 205b5d3730353139\\nR10: 0000000000000000 R11: 205d303938375420 R12: ffff8881086500c4\\nR13: ffff8881086500c4 R14: ffff8881086500b0 R15: ffff888108650040\\nFS:  00007f5b2961a4c0(0000) GS:ffff88823bd00000(0000) knlGS:0000000000000000\\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\nCR2: 000055d7ed36fd18 CR3: 00000001482f6000 CR4: 00000000000006f0\\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\\nCall Trace:\\n \u003cTASK\u003e\\n ? show_regs+0xa3/0xc0\\n ? __warn+0xa5/0x1c0\\n ? refcount_warn_saturate+0xdf/0x1d0\\n ? report_bug+0x1fc/0x2d0\\n ? refcount_warn_saturate+0xdf/0x1d0\\n ? handle_bug+0xa1/0x110\\n ? exc_invalid_op+0x3c/0xb0\\n ? asm_exc_invalid_op+0x1f/0x30\\n ? __warn_printk+0xcc/0x140\\n ? __warn_printk+0xd5/0x140\\n ? refcount_warn_saturate+0xdf/0x1d0\\n get_net_ns+0xa4/0xc0\\n ? __pfx_get_net_ns+0x10/0x10\\n open_related_ns+0x5a/0x130\\n __tun_chr_ioctl+0x1616/0x2370\\n ? __sanitizer_cov_trace_switch+0x58/0xa0\\n ? __sanitizer_cov_trace_const_cmp2+0x1c/0x30\\n ? __pfx_tun_chr_ioctl+0x10/0x10\\n tun_chr_ioctl+0x2f/0x40\\n __x64_sys_ioctl+0x11b/0x160\\n x64_sys_call+0x1211/0x20d0\\n do_syscall_64+0x9e/0x1d0\\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\\nRIP: 0033:0x7f5b28f165d7\\nCode: b3 66 90 48 8b 05 b1 48 2d 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 b8 10 00 00 00 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 8b 0d 81 48 2d 00 8\\nRSP: 002b:00007ffc2b59c5e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010\\nRAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5b28f165d7\\nRDX: 0000000000000000 RSI: 00000000000054e3 RDI: 0000000000000003\\nRBP: 00007ffc2b59c650 R08: 00007f5b291ed8c0 R09: 00007f5b2961a4c0\\nR10: 0000000029690010 R11: 0000000000000246 R12: 0000000000400730\\nR13: 00007ffc2b59cf40 R14: 0000000000000000 R15: 0000000000000000\\n \u003c/TASK\u003e\\nKernel panic - not syncing: kernel: panic_on_warn set ...\\n\\nThis is trigger as below:\\n          ns0                                    ns1\\ntun_set_iff() //dev is tun0\\n   tun-\u003edev = dev\\n//ip link set tun0 netns ns1\\n                                       put_net() //ref is 0\\n__tun_chr_ioctl() //TUNGETDEVNETNS\\n   net = dev_net(tun-\u003edev);\\n   open_related_ns(\u0026net-\u003ens, get_net_ns); //ns1\\n     get_net_ns()\\n        get_net() //addition on 0\\n\\nUse maybe_get_net() in get_net_ns in case net\u0027s ref is zero to fix this\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-11-05T09:33:56.275Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-40958\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-11-05T09:33:56.275Z\", \"dateReserved\": \"2024-07-12T12:17:45.593Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-07-12T12:32:00.431Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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