3.3

CVE-2024-46794: x86/tdx: Fix data leak in mmio_read()

Modified
AliasesUBUNTU-CVE-2024-46794DEBIAN-CVE-2024-46794
Published 18-09-2024Last modified 11-05-2026

Vulnerability summary

CVE-2024-46794 is a low (CVSS 3.3) vulnerability in linux. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 9.5% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 3.3, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
3.3/10
010
Low · v3.1 (NVD)
EPSS score
0.20%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 18 · Related 14
DLA-4008-1DSA-5782-1MGASA-2024-0316MGASA-2024-0318SUSE-SU-2024:3551-1SUSE-SU-2024:3553-1

Timeline

  1. 18-09-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: x86/tdx: Fix data leak in mmio_read() The mmio_read() function makes a TDVMCALL to retrieve MMIO data for an address from the VMM. Sean noticed that mmio_read() unintentionally exposes the value of an initialized variable (val) on the stack to the VMM. This variable is only needed as an output value. It did not need to be passed to the VMM in the first place. Do not send the original value of *val to the VMM. [ dhansen: clarify what 'val' is used for. ]

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.20%

Chance of exploitation in the next 30 days

Percentile

10%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.20% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu93 products
  • linux< 6.8.0-50.51
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 6.8.0-1020.22
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 31d58c4e557d46fa7f8557714250fb6f89c941ae, < 26c6af49d26ffc377e392e30d4086db19eed0ef7 | ≥ 31d58c4e557d46fa7f8557714250fb6f89c941ae, < ef00818c50cf55a3a56bd9a9fae867c92dfb84e7 | ≥ 31d58c4e557d46fa7f8557714250fb6f89c941ae, < b55ce742afcb8e8189d82f2f1e635ba1b5a461fa | ≥ 31d58c4e557d46fa7f8557714250fb6f89c941ae, < b6fb565a2d15277896583d471b21bc14a0c99661 | 5.19
  • linux_kernel≤ 5.19 | ≥ 6.1, < 6.1.110 | ≥ 6.6, < 6.6.51 | ≥ 6.10, < 6.10.10 | 6.11:rc1 | 6.11:rc2 | 6.11:rc3 | 6.11:rc4 | 6.11:rc5 | 6.11:rc6
Debian1 product
  • linux< 6.1.112-1 | < 6.10.11-1

3 vendors · 96 products

References

14 links
Show all 14 references