CVE-2026-43147 (GCVE-0-2026-43147)
Vulnerability from cvelistv5 – Published: 2026-05-06 11:27 – Updated: 2026-05-06 11:27
VLAI?
Title
Revert "PCI/IOV: Add PCI rescan-remove locking when enabling/disabling SR-IOV"
Summary
In the Linux kernel, the following vulnerability has been resolved:
Revert "PCI/IOV: Add PCI rescan-remove locking when enabling/disabling SR-IOV"
This reverts commit 05703271c3cd ("PCI/IOV: Add PCI rescan-remove locking
when enabling/disabling SR-IOV"), which causes a deadlock by recursively
taking pci_rescan_remove_lock when sriov_del_vfs() is called as part of
pci_stop_and_remove_bus_device(). For example with the following sequence
of commands:
$ echo <NUM> > /sys/bus/pci/devices/<pf>/sriov_numvfs
$ echo 1 > /sys/bus/pci/devices/<pf>/remove
A trimmed trace of the deadlock on a mlx5 device is as below:
zsh/5715 is trying to acquire lock:
000002597926ef50 (pci_rescan_remove_lock){+.+.}-{3:3}, at: sriov_disable+0x34/0x140
but task is already holding lock:
000002597926ef50 (pci_rescan_remove_lock){+.+.}-{3:3}, at: pci_stop_and_remove_bus_device_locked+0x24/0x80
...
Call Trace:
[<00000259778c4f90>] dump_stack_lvl+0xc0/0x110
[<00000259779c844e>] print_deadlock_bug+0x31e/0x330
[<00000259779c1908>] __lock_acquire+0x16c8/0x32f0
[<00000259779bffac>] lock_acquire+0x14c/0x350
[<00000259789643a6>] __mutex_lock_common+0xe6/0x1520
[<000002597896413c>] mutex_lock_nested+0x3c/0x50
[<00000259784a07e4>] sriov_disable+0x34/0x140
[<00000258f7d6dd80>] mlx5_sriov_disable+0x50/0x80 [mlx5_core]
[<00000258f7d5745e>] remove_one+0x5e/0xf0 [mlx5_core]
[<00000259784857fc>] pci_device_remove+0x3c/0xa0
[<000002597851012e>] device_release_driver_internal+0x18e/0x280
[<000002597847ae22>] pci_stop_bus_device+0x82/0xa0
[<000002597847afce>] pci_stop_and_remove_bus_device_locked+0x5e/0x80
[<00000259784972c2>] remove_store+0x72/0x90
[<0000025977e6661a>] kernfs_fop_write_iter+0x15a/0x200
[<0000025977d7241c>] vfs_write+0x24c/0x300
[<0000025977d72696>] ksys_write+0x86/0x110
[<000002597895b61c>] __do_syscall+0x14c/0x400
[<000002597896e0ee>] system_call+0x6e/0x90
This alone is not a complete fix as it restores the issue the cited commit
tried to solve. A new fix will be provided as a follow on.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Linux | Linux |
Affected:
1e8a80290f964bdbad225221c8a1594c7e01c8fd , < f61cdd7e9b67bb8961b0a81bf294b78343e5db05
(git)
Affected: a645ca21de09e3137cbb224fa6c23cca873a1d01 , < 0de341b2365bad430aade0853fe09c2cbe468f59 (git) Affected: a24219172456f035d886857e265ca24c85b167c8 , < 83651d37474c762920e345a3a0828f975ca4d732 (git) Affected: 36039348bca77828bf06eae41b8f76e38cd15847 , < 639265296fe6ee21b6f00e00ee2bab65f3b07252 (git) Affected: 53154cd40ccf285f1d1c24367824082061d155bd , < d47f27e145f8bd13f3c230da5e3af29225b4a2f7 (git) Affected: 05703271c3cdcc0f2a8cf6ebdc45892b8ca83520 , < 40f67686a5002c0c322fac918406bbc8d9c2ec2f (git) Affected: 05703271c3cdcc0f2a8cf6ebdc45892b8ca83520 , < 58677783c89681871077f50a7042b0c6380c4fd8 (git) Affected: 05703271c3cdcc0f2a8cf6ebdc45892b8ca83520 , < 2fa119c0e5e528453ebae9e70740e8d2d8c0ed5a (git) Affected: 5c1cd7d405e94dc6cb320cc0cc092b74895b6ddf (git) Affected: ee40e5db052d7c6f406fdb95ad639c894c74674c (git) |
|||||||
|
|||||||||
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/pci/iov.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
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"status": "affected",
"version": "1e8a80290f964bdbad225221c8a1594c7e01c8fd",
"versionType": "git"
},
{
"lessThan": "0de341b2365bad430aade0853fe09c2cbe468f59",
"status": "affected",
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"versionType": "git"
},
{
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"status": "affected",
"version": "a24219172456f035d886857e265ca24c85b167c8",
"versionType": "git"
},
{
"lessThan": "639265296fe6ee21b6f00e00ee2bab65f3b07252",
"status": "affected",
"version": "36039348bca77828bf06eae41b8f76e38cd15847",
"versionType": "git"
},
{
"lessThan": "d47f27e145f8bd13f3c230da5e3af29225b4a2f7",
"status": "affected",
"version": "53154cd40ccf285f1d1c24367824082061d155bd",
"versionType": "git"
},
{
"lessThan": "40f67686a5002c0c322fac918406bbc8d9c2ec2f",
"status": "affected",
"version": "05703271c3cdcc0f2a8cf6ebdc45892b8ca83520",
"versionType": "git"
},
{
"lessThan": "58677783c89681871077f50a7042b0c6380c4fd8",
"status": "affected",
"version": "05703271c3cdcc0f2a8cf6ebdc45892b8ca83520",
"versionType": "git"
},
{
"lessThan": "2fa119c0e5e528453ebae9e70740e8d2d8c0ed5a",
"status": "affected",
"version": "05703271c3cdcc0f2a8cf6ebdc45892b8ca83520",
"versionType": "git"
},
{
"status": "affected",
"version": "5c1cd7d405e94dc6cb320cc0cc092b74895b6ddf",
"versionType": "git"
},
{
"status": "affected",
"version": "ee40e5db052d7c6f406fdb95ad639c894c74674c",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/pci/iov.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.18"
},
{
"lessThan": "6.18",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.252",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.202",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.165",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.128",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.75",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.16",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.19.*",
"status": "unaffected",
"version": "6.19.6",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.252",
"versionStartIncluding": "5.10.246",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.202",
"versionStartIncluding": "5.15.195",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.165",
"versionStartIncluding": "6.1.157",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.128",
"versionStartIncluding": "6.6.113",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.75",
"versionStartIncluding": "6.12.54",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.16",
"versionStartIncluding": "6.18",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.19.6",
"versionStartIncluding": "6.18",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.0",
"versionStartIncluding": "6.18",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.4.301",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.17.4",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRevert \"PCI/IOV: Add PCI rescan-remove locking when enabling/disabling SR-IOV\"\n\nThis reverts commit 05703271c3cd (\"PCI/IOV: Add PCI rescan-remove locking\nwhen enabling/disabling SR-IOV\"), which causes a deadlock by recursively\ntaking pci_rescan_remove_lock when sriov_del_vfs() is called as part of\npci_stop_and_remove_bus_device(). For example with the following sequence\nof commands:\n\n $ echo \u003cNUM\u003e \u003e /sys/bus/pci/devices/\u003cpf\u003e/sriov_numvfs\n $ echo 1 \u003e /sys/bus/pci/devices/\u003cpf\u003e/remove\n\nA trimmed trace of the deadlock on a mlx5 device is as below:\n\n zsh/5715 is trying to acquire lock:\n 000002597926ef50 (pci_rescan_remove_lock){+.+.}-{3:3}, at: sriov_disable+0x34/0x140\n\n but task is already holding lock:\n 000002597926ef50 (pci_rescan_remove_lock){+.+.}-{3:3}, at: pci_stop_and_remove_bus_device_locked+0x24/0x80\n ...\n Call Trace:\n [\u003c00000259778c4f90\u003e] dump_stack_lvl+0xc0/0x110\n [\u003c00000259779c844e\u003e] print_deadlock_bug+0x31e/0x330\n [\u003c00000259779c1908\u003e] __lock_acquire+0x16c8/0x32f0\n [\u003c00000259779bffac\u003e] lock_acquire+0x14c/0x350\n [\u003c00000259789643a6\u003e] __mutex_lock_common+0xe6/0x1520\n [\u003c000002597896413c\u003e] mutex_lock_nested+0x3c/0x50\n [\u003c00000259784a07e4\u003e] sriov_disable+0x34/0x140\n [\u003c00000258f7d6dd80\u003e] mlx5_sriov_disable+0x50/0x80 [mlx5_core]\n [\u003c00000258f7d5745e\u003e] remove_one+0x5e/0xf0 [mlx5_core]\n [\u003c00000259784857fc\u003e] pci_device_remove+0x3c/0xa0\n [\u003c000002597851012e\u003e] device_release_driver_internal+0x18e/0x280\n [\u003c000002597847ae22\u003e] pci_stop_bus_device+0x82/0xa0\n [\u003c000002597847afce\u003e] pci_stop_and_remove_bus_device_locked+0x5e/0x80\n [\u003c00000259784972c2\u003e] remove_store+0x72/0x90\n [\u003c0000025977e6661a\u003e] kernfs_fop_write_iter+0x15a/0x200\n [\u003c0000025977d7241c\u003e] vfs_write+0x24c/0x300\n [\u003c0000025977d72696\u003e] ksys_write+0x86/0x110\n [\u003c000002597895b61c\u003e] __do_syscall+0x14c/0x400\n [\u003c000002597896e0ee\u003e] system_call+0x6e/0x90\n\nThis alone is not a complete fix as it restores the issue the cited commit\ntried to solve. A new fix will be provided as a follow on."
}
],
"providerMetadata": {
"dateUpdated": "2026-05-06T11:27:30.235Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/f61cdd7e9b67bb8961b0a81bf294b78343e5db05"
},
{
"url": "https://git.kernel.org/stable/c/0de341b2365bad430aade0853fe09c2cbe468f59"
},
{
"url": "https://git.kernel.org/stable/c/83651d37474c762920e345a3a0828f975ca4d732"
},
{
"url": "https://git.kernel.org/stable/c/639265296fe6ee21b6f00e00ee2bab65f3b07252"
},
{
"url": "https://git.kernel.org/stable/c/d47f27e145f8bd13f3c230da5e3af29225b4a2f7"
},
{
"url": "https://git.kernel.org/stable/c/40f67686a5002c0c322fac918406bbc8d9c2ec2f"
},
{
"url": "https://git.kernel.org/stable/c/58677783c89681871077f50a7042b0c6380c4fd8"
},
{
"url": "https://git.kernel.org/stable/c/2fa119c0e5e528453ebae9e70740e8d2d8c0ed5a"
}
],
"title": "Revert \"PCI/IOV: Add PCI rescan-remove locking when enabling/disabling SR-IOV\"",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-43147",
"datePublished": "2026-05-06T11:27:30.235Z",
"dateReserved": "2026-05-01T14:12:55.989Z",
"dateUpdated": "2026-05-06T11:27:30.235Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-43147",
"date": "2026-05-07",
"epss": "0.00024",
"percentile": "0.06957"
},
"nvd": "{\"cve\":{\"id\":\"CVE-2026-43147\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-05-06T12:16:32.240\",\"lastModified\":\"2026-05-06T13:07:51.607\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nRevert \\\"PCI/IOV: Add PCI rescan-remove locking when enabling/disabling SR-IOV\\\"\\n\\nThis reverts commit 05703271c3cd (\\\"PCI/IOV: Add PCI rescan-remove locking\\nwhen enabling/disabling SR-IOV\\\"), which causes a deadlock by recursively\\ntaking pci_rescan_remove_lock when sriov_del_vfs() is called as part of\\npci_stop_and_remove_bus_device(). For example with the following sequence\\nof commands:\\n\\n $ echo \u003cNUM\u003e \u003e /sys/bus/pci/devices/\u003cpf\u003e/sriov_numvfs\\n $ echo 1 \u003e /sys/bus/pci/devices/\u003cpf\u003e/remove\\n\\nA trimmed trace of the deadlock on a mlx5 device is as below:\\n\\n zsh/5715 is trying to acquire lock:\\n 000002597926ef50 (pci_rescan_remove_lock){+.+.}-{3:3}, at: sriov_disable+0x34/0x140\\n\\n but task is already holding lock:\\n 000002597926ef50 (pci_rescan_remove_lock){+.+.}-{3:3}, at: pci_stop_and_remove_bus_device_locked+0x24/0x80\\n ...\\n Call Trace:\\n [\u003c00000259778c4f90\u003e] dump_stack_lvl+0xc0/0x110\\n [\u003c00000259779c844e\u003e] print_deadlock_bug+0x31e/0x330\\n [\u003c00000259779c1908\u003e] __lock_acquire+0x16c8/0x32f0\\n [\u003c00000259779bffac\u003e] lock_acquire+0x14c/0x350\\n [\u003c00000259789643a6\u003e] __mutex_lock_common+0xe6/0x1520\\n [\u003c000002597896413c\u003e] mutex_lock_nested+0x3c/0x50\\n [\u003c00000259784a07e4\u003e] sriov_disable+0x34/0x140\\n [\u003c00000258f7d6dd80\u003e] mlx5_sriov_disable+0x50/0x80 [mlx5_core]\\n [\u003c00000258f7d5745e\u003e] remove_one+0x5e/0xf0 [mlx5_core]\\n [\u003c00000259784857fc\u003e] pci_device_remove+0x3c/0xa0\\n [\u003c000002597851012e\u003e] device_release_driver_internal+0x18e/0x280\\n [\u003c000002597847ae22\u003e] pci_stop_bus_device+0x82/0xa0\\n [\u003c000002597847afce\u003e] pci_stop_and_remove_bus_device_locked+0x5e/0x80\\n [\u003c00000259784972c2\u003e] remove_store+0x72/0x90\\n [\u003c0000025977e6661a\u003e] kernfs_fop_write_iter+0x15a/0x200\\n [\u003c0000025977d7241c\u003e] vfs_write+0x24c/0x300\\n [\u003c0000025977d72696\u003e] ksys_write+0x86/0x110\\n [\u003c000002597895b61c\u003e] __do_syscall+0x14c/0x400\\n [\u003c000002597896e0ee\u003e] system_call+0x6e/0x90\\n\\nThis alone is not a complete fix as it restores the issue the cited commit\\ntried to solve. A new fix will be provided as a follow on.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0de341b2365bad430aade0853fe09c2cbe468f59\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2fa119c0e5e528453ebae9e70740e8d2d8c0ed5a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/40f67686a5002c0c322fac918406bbc8d9c2ec2f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/58677783c89681871077f50a7042b0c6380c4fd8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/639265296fe6ee21b6f00e00ee2bab65f3b07252\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/83651d37474c762920e345a3a0828f975ca4d732\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d47f27e145f8bd13f3c230da5e3af29225b4a2f7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f61cdd7e9b67bb8961b0a81bf294b78343e5db05\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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