KVM: Stop looking for coalesced MMIO zones if the bus is destroyed (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.24 % · percentile 15 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Modified
Description
In the Linux kernel, the following vulnerability has been resolved: KVM: Stop looking for coalesced MMIO zones if the bus is destroyed Abort the walk of coalesced MMIO zones if kvm_io_bus_unregister_dev() fails to allocate memory for the new instance of the bus. If it can't instantiate a new bus, unregister_dev() destroys all devices _except_ the target device. But, it doesn't tell the caller that it obliterated the bus and invoked the destructor for all devices that were on the bus. In the coalesced MMIO case, this can result in a deleted list entry dereference due to attempting to continue iterating on coalesced_zones after future entries (in the walk) have been deleted. Opportunistically add curly braces to the for-loop, which encompasses many lines but sneaks by without braces due to the guts being a single if statement.
References
- https://git.kernel.org/stable/c/7d1bc32d6477ff96a32695ea4be8144e4513ab2d
- https://git.kernel.org/stable/c/2a20592baff59c5351c5200ec667e1a2aa22af85
- https://git.kernel.org/stable/c/168e82f640ed1891a700bdb43e37da354b2ab63c
- https://git.kernel.org/stable/c/50cbad42bfea8c052b7ca590bd4126cdc898713c
- https://git.kernel.org/stable/c/5d3c4c79384af06e3c8e25b7770b6247496b4417
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | Linux |
| CVSS 3.1 | MEDIUM 6.0 | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H | CISA-ADP |
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary) |
| CVSS 3.1 | MEDIUM 6.0 | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H | NVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary) |
European references
- ENISA EUVD · EUVD-2021-33708
- GCVE · GCVE-0-2021-47060
CERT-FR advisories
- CERTFR-2024-AVI-0458 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0440 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0420 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0265 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0242 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.4.66 < 5.4.119cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.9 < 5.10.37cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.11 < 5.11.21cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.12 < 5.12.4
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 41b2ea7a6a11e2b1a7f2c29e1675a709a6b2b98d < 7d1bc32d6477ff96a32695ea4be8144e4513ab2d ; affected f65886606c2d3b562716de030706dfe1bea4ed5e < 2a20592baff59c5351c5200ec667e1a2aa22af85 ; affected f65886606c2d3b562716de030706dfe1bea4ed5e < 168e82f640ed1891a700bdb43e37da354b2ab63c ; affected f65886606c2d3b562716de030706dfe1bea4ed5e < 50cbad42bfea8c052b7ca590bd4126cdc898713c ; affected f65886606c2d3b562716de030706dfe1bea4ed5e < 5d3c4c79384af06e3c8e25b7770b6247496b4417 ; affected f0dfffce3f4ffd5f822568a4a6fb34c010e939d1 |
| Linux · Linux | affected 5.9 ; unaffected 0 < 5.9 ; unaffected 5.4.119 ≤ 5.4.* ; unaffected 5.10.37 ≤ 5.10.* ; unaffected 5.11.21 ≤ 5.11.* ; unaffected 5.12.4 ≤ 5.12.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |