CVE-2026-43147: Revert "PCI/IOV: Add PCI rescan-remove locking when enabling/disabling SR-IOV"
Noroxi assessment
Priority: Monitor (action score 22/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 0.09% (FIRST EPSS).
- Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
- Fixed version: Linux Linux 0de341b2365bad430aade0853fe09c2cbe468f59, 2fa119c0e5e528453ebae9e70740e8d2d8c0ed5a, 40f67686a5002c0c322fac918406bbc8d9c2ec2f.
- Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).
Low priority for now. Upgrade to Linux Linux 0de341b2365bad430aade0853fe09c2cbe468f59, 2fa119c0e5e528453ebae9e70740e8d2d8c0ed5a, 40f67686a5002c0c322fac918406bbc8d9c2ec2f or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
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.
- Published
- May 6, 2026
- Updated
- Jun 17, 2026
- EPSS
- 0.0% · 0th percentile
- CWE
- CWE-667
Report tools
Action score
22
Monitor
Low priority for now.
- CVSS
- 22 / 40 · 5.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.0%
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| linux | linux kernel | cpe:2.3:o:linux:linux_kernel |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- linux linux kernel5.4.301 and later · before 5.5
- linux linux kernel5.10.246 and later · before 5.10.252
- linux linux kernel5.15.195 and later · before 5.15.202
- linux linux kernel6.1.157 and later · before 6.1.165
- linux linux kernel6.6.113 and later · before 6.6.128
- linux linux kernel6.12.54 and later · before 6.12.75
- linux linux kernel6.17.4 and later · before 6.18.16
- linux linux kernel6.19 and later · before 6.19.6
Versions reported by the vendor
Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.
Linux Linux
- 5c1cd7d405e94dc6cb320cc0cc092b74895b6ddf, ee40e5db052d7c6f406fdb95ad639c894c74674c, 6.18affected
- 1e8a80290f964bdbad225221c8a1594c7e01c8fd and later · before f61cdd7e9b67bb8961b0a81bf294b78343e5db05affected · git
- a645ca21de09e3137cbb224fa6c23cca873a1d01 and later · before 0de341b2365bad430aade0853fe09c2cbe468f59affected · git
- a24219172456f035d886857e265ca24c85b167c8 and later · before 83651d37474c762920e345a3a0828f975ca4d732affected · git
- 36039348bca77828bf06eae41b8f76e38cd15847 and later · before 639265296fe6ee21b6f00e00ee2bab65f3b07252affected · git
- 53154cd40ccf285f1d1c24367824082061d155bd and later · before d47f27e145f8bd13f3c230da5e3af29225b4a2f7affected · git
- 05703271c3cdcc0f2a8cf6ebdc45892b8ca83520 and later · before 40f67686a5002c0c322fac918406bbc8d9c2ec2faffected · git
- 05703271c3cdcc0f2a8cf6ebdc45892b8ca83520 and later · before 58677783c89681871077f50a7042b0c6380c4fd8affected · git
- 05703271c3cdcc0f2a8cf6ebdc45892b8ca83520 and later · before 2fa119c0e5e528453ebae9e70740e8d2d8c0ed5aaffected · git
- 5.10.246 and later · before 5.10.252affected · semver
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | linux | before 6.1.170-1 | 6.1.170-1 |
| Debian:13 | linux | before 6.12.85-1 | 6.12.85-1 |
| Debian:14 | linux | before 6.19.6-1 | 6.19.6-1 |
| SUSE:Linux Enterprise Live Patching 15 SP6 | kernel-default | before 6.4.0-150600.23.135.1 | 6.4.0-150600.23.135.1 |
| SUSE:Linux Enterprise Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6_Update_31 | before 1-150600.13.3.4 | 1-150600.13.3.4 |
| SUSE:Linux Enterprise Server 15 SP6-LTSS | kernel-64kb | before 6.4.0-150600.23.135.1 | 6.4.0-150600.23.135.1 |
| SUSE:Linux Enterprise Server 15 SP6-LTSS | kernel-default-base | before 6.4.0-150600.23.135.1.150600.12.62.4 | 6.4.0-150600.23.135.1.150600.12.62.4 |
| SUSE:Linux Enterprise Server 15 SP6-LTSS | kernel-docs | before 6.4.0-150600.23.135.1 | 6.4.0-150600.23.135.1 |
| SUSE:Linux Enterprise Server 15 SP6-LTSS | kernel-obs-build | before 6.4.0-150600.23.135.1 | 6.4.0-150600.23.135.1 |
| SUSE:Linux Enterprise Server 15 SP6-LTSS | kernel-source | before 6.4.0-150600.23.135.1 | 6.4.0-150600.23.135.1 |
| SUSE:Linux Enterprise Server 15 SP6-LTSS | kernel-syms | before 6.4.0-150600.23.135.1 | 6.4.0-150600.23.135.1 |
| SUSE:Linux Enterprise Server 15 SP6-LTSS | kernel-zfcpdump | before 6.4.0-150600.23.135.1 | 6.4.0-150600.23.135.1 |
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV90Now
- CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV89Now
- CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV85Now
Published before and after this one in the same product
- ← EarlierCVE-2026-43145May 6, 2026 · remoteproc: imx_rproc: Fix invalid loaded resource table detection22Monitor
- ← EarlierCVE-2026-43146May 6, 2026 · media: iris: Add buffer to list only after successful allocation22Monitor
- Later →CVE-2026-43148May 6, 2026 · powerpc/smp: Add check for kcalloc() failure in parse_thread_groups()22Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Linux Linux | 0de341b2365bad430aade0853fe09c2cbe468f59 | Vendor (CNA) |
| Linux Linux | 2fa119c0e5e528453ebae9e70740e8d2d8c0ed5a | Vendor (CNA) |
| Linux Linux | 40f67686a5002c0c322fac918406bbc8d9c2ec2f | Vendor (CNA) |
| Linux Linux | 5.10.252 | Vendor (CNA) |
| Linux Linux | 5.15.202 | Vendor (CNA) |
| Linux Linux | 5.5 | Vendor (CNA) |
| Linux Linux | 58677783c89681871077f50a7042b0c6380c4fd8 | Vendor (CNA) |
| Linux Linux | 6.1.165 | Vendor (CNA) |
| Linux Linux | 6.12.75 | Vendor (CNA) |
| Linux Linux | 6.18 | Vendor (CNA) |
| Linux Linux | 6.6.128 | Vendor (CNA) |
| Linux Linux | 639265296fe6ee21b6f00e00ee2bab65f3b07252 | Vendor (CNA) |
| Linux Linux | 83651d37474c762920e345a3a0828f975ca4d732 | Vendor (CNA) |
| Linux Linux | d47f27e145f8bd13f3c230da5e3af29225b4a2f7 | Vendor (CNA) |
| Linux Linux | f61cdd7e9b67bb8961b0a81bf294b78343e5db05 | Vendor (CNA) |
| debian:linux | 6.1.170-1 · Debian:12 | Package registry (OSV) |
| suse:kernel-64kb | 6.4.0-150600.23.135.1 · SUSE:Linux Enterprise Server 15 SP6-LTSS | Package registry (OSV) |
| suse:kernel-default | 6.4.0-150600.23.135.1 · SUSE:Linux Enterprise Live Patching 15 SP6 | Package registry (OSV) |
| suse:kernel-default-base | 6.4.0-150600.23.135.1.150600.12.62.4 · SUSE:Linux Enterprise Server 15 SP6-LTSS | Package registry (OSV) |
| suse:kernel-docs | 6.4.0-150600.23.135.1 · SUSE:Linux Enterprise Server 15 SP6-LTSS | Package registry (OSV) |
| suse:kernel-livepatch-SLE15-SP6_Update_31 | 1-150600.13.3.4 · SUSE:Linux Enterprise Live Patching 15 SP6 | Package registry (OSV) |
| suse:kernel-obs-build | 6.4.0-150600.23.135.1 · SUSE:Linux Enterprise Server 15 SP6-LTSS | Package registry (OSV) |
| suse:kernel-source | 6.4.0-150600.23.135.1 · SUSE:Linux Enterprise Server 15 SP6-LTSS | Package registry (OSV) |
| suse:kernel-syms | 6.4.0-150600.23.135.1 · SUSE:Linux Enterprise Server 15 SP6-LTSS | Package registry (OSV) |
| suse:kernel-zfcpdump | 6.4.0-150600.23.135.1 · SUSE:Linux Enterprise Server 15 SP6-LTSS | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
No history yet (it accumulates with the daily EPSS job).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-26-0196 · May 8, 2026(Linux Kernel Güvenlik Bildirimi)
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-667 · Improper LockingCVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (7 more)Show less
- git.kernel.org/stable/c/2fa119c0e5e528453ebae9e70740e8d2d8c0ed5a
- git.kernel.org/stable/c/40f67686a5002c0c322fac918406bbc8d9c2ec2f
- git.kernel.org/stable/c/58677783c89681871077f50a7042b0c6380c4fd8
- git.kernel.org/stable/c/639265296fe6ee21b6f00e00ee2bab65f3b07252
- git.kernel.org/stable/c/83651d37474c762920e345a3a0828f975ca4d732
- git.kernel.org/stable/c/d47f27e145f8bd13f3c230da5e3af29225b4a2f7
- git.kernel.org/stable/c/f61cdd7e9b67bb8961b0a81bf294b78343e5db05
Vendor advisories and official records. Exploit/PoC links are deliberately left out.