CVE-2024-50115: KVM: nSVM: Ignore nCR3[4:0] when loading PDPTEs from memory
Vulnerability summary
CVE-2024-50115 is a high (CVSS 8.4) Out-of-bounds Read vulnerability in linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 15.8% of scored vulnerabilities.
Not severe (CVSS 8.4, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 89 · Related 86Timeline
- 05-11-2024PublishedVulnerability first disclosed.
- 05-08-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Ignore nCR3[4:0] when loading PDPTEs from memory Ignore nCR3[4:0] when loading PDPTEs from memory for nested SVM, as bits 4:0 of CR3 are ignored when PAE paging is used, and thus VMRUN doesn't enforce 32-byte alignment of nCR3. In the absolute worst case scenario, failure to ignore bits 4:0 can result in an out-of-bounds read, e.g. if the target page is at the end of a memslot, and the VMM isn't using guard pages. Per the APM: The CR3 register points to the base address of the page-directory-pointer table. The page-directory-pointer table is aligned on a 32-byte boundary, with the low 5 address bits 4:0 assumed to be 0. And the SDM's much more explicit: 4:0 Ignored Note, KVM gets this right when loading PDPTRs, it's only the nSVM flow that is broken.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated8.4HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:HDiffers
- NVDNIST7.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:HDiffers
EPSS trend
Probability
0.24%
Chance of exploitation in the next 30 days
Percentile
16%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.24% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu134 products
- linuxAll versions (No fix recorded) | < 5.15.0-133.144 | < 6.8.0-58.60
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 5.15.0-1078.85 | < 6.8.0-1027.29
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ e4e517b4be019787ada4cbbce2f04570c21b0cbd, < 76ce386feb14ec9a460784fcd495d8432acce7a5 | ≥ e4e517b4be019787ada4cbbce2f04570c21b0cbd, < 58cb697d80e669c56197f703e188867c8c54c494 | ≥ e4e517b4be019787ada4cbbce2f04570c21b0cbd, < 6876793907cbe19d42e9edc8c3315a21e06c32ae | ≥ e4e517b4be019787ada4cbbce2f04570c21b0cbd, < 2c4adc9b192a0815fe58a62bc0709449416cc884 | ≥ e4e517b4be019787ada4cbbce2f04570c21b0cbd, < 426682afec71ea3f889b972d038238807b9443e4 | ≥ e4e517b4be019787ada4cbbce2f04570c21b0cbd, < f559b2e9c5c5308850544ab59396b7d53cfc67bd | 3.2
- linux_kernel≥ 3.2, < 5.10.229 | ≥ 5.11, < 5.15.170 | ≥ 5.16, < 6.1.115 | ≥ 6.2, < 6.6.59 | ≥ 6.7, < 6.11.6 | 6.12:rc1 | 6.12:rc2 | 6.12:rc3 | 6.12:rc4
Debian1 product
- linux< 6.1.115-1 | < 6.11.6-1
3 vendors · 137 products
