2.1

CVE-2006-1056: linux linux_kernel Cryptographic Issues

Modified
Published 20-04-2006Last modified 07-08-2024
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Vulnerability summary

CVE-2006-1056 is a low (CVSS 2.1) Cryptographic Issues vulnerability in linux linux_kernel. EPSS estimates a 0.46% chance of exploitation in the next 30 days, higher than 39.8% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 2.1, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
2.1/10
010
Low · v2.0 (NVD)
EPSS score
0.46%
0%100%
Low · +0.01 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 4
DSA-1097-1DSA-1103RHSA-2006:0437RHSA-2006:0575

Timeline

  1. 20-04-2006
    PublishedVulnerability first disclosed.
  2. 07-08-2024
    Last modifiedVulnerability information updated.

Description

The Linux kernel before 2.6.16.9 and the FreeBSD kernel, when running on AMD64 and other 7th and 8th generation AuthenticAMD processors, only save/restore the FOP, FIP, and FDP x87 registers in FXSAVE/FXRSTOR when an exception is pending, which allows one process to determine portions of the state of floating point instructions of other processes, which can be leveraged to obtain sensitive information such as cryptographic keys. NOTE: this is the documented behavior of AMD64 processors, but it is inconsistent with Intel processors in a security-relevant fashion that was not addressed by the kernels.

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

Probability

0.46%

Chance of exploitation in the next 30 days

Percentile

40%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.45% 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

Affected systems

Version check

Known conditions: local access, no authentication (CVSS vector). Other conditions: not stated in public data.

Linux1 product
  • linux_kernel≤ 2.6.16.8 | 2.6.0 | 2.6.0:test1 | 2.6.0:test10 | 2.6.0:test11 | 2.6.0:test2 | 2.6.0:test3 | 2.6.0:test4 | 2.6.0:test5 | 2.6.0:test6 | 2.6.0:test7 | 2.6.0:test8 | 2.6.0:test9 | 2.6.1 | 2.6.1:rc1 | 2.6.1:rc2 | 2.6.1:rc3 | 2.6.2 | 2.6.2:rc1 | 2.6.2:rc2 | 2.6.2:rc3 | 2.6.3 | 2.6.3:rc1 | 2.6.3:rc2 | 2.6.3:rc3 | 2.6.3:rc4 | 2.6.4 | 2.6.4:rc1 | 2.6.4:rc2 | 2.6.4:rc3 | 2.6.5 | 2.6.5:rc1 | 2.6.5:rc2 | 2.6.5:rc3 | 2.6.6 | 2.6.6:rc1 | 2.6.6:rc2 | 2.6.6:rc3 | 2.6.7 | 2.6.7:rc1 | 2.6.7:rc2 | 2.6.7:rc3 | 2.6.8 | 2.6.8:rc1 | 2.6.8:rc2 | 2.6.8:rc3 | 2.6.8:rc4 | 2.6.9 | 2.6.9:2.6.20 | 2.6.9:rc1 | 2.6.9:rc2 | 2.6.9:rc3 | 2.6.9:rc4 | 2.6.10 | 2.6.10:rc1 | 2.6.10:rc2 | 2.6.10:rc3 | 2.6.11 | 2.6.11:rc1 | 2.6.11:rc2 | 2.6.11:rc3 | 2.6.11:rc4 | 2.6.11:rc5 | 2.6.11.1 | 2.6.11.2 | 2.6.11.3 | 2.6.11.4 | 2.6.11.5 | 2.6.11.6 | 2.6.11.7 | 2.6.11.8 | 2.6.11.9 | 2.6.11.10 | 2.6.11.11 | 2.6.11.12 | 2.6.12:rc1 | 2.6.12:rc2 | 2.6.12:rc3 | 2.6.12:rc4 | 2.6.12:rc5 | 2.6.12:rc6 | 2.6.12.1 | 2.6.12.2 | 2.6.12.3 | 2.6.12.4 | 2.6.12.5 | 2.6.12.6 | 2.6.13 | 2.6.13:rc1 | 2.6.13:rc2 | 2.6.13:rc3 | 2.6.13:rc4 | 2.6.13:rc5 | 2.6.13:rc6 | 2.6.13:rc7 | 2.6.13.1 | 2.6.13.2 | 2.6.13.3 | 2.6.13.4 | 2.6.14 | 2.6.14:rc1 | 2.6.14:rc2 | 2.6.14:rc3 | 2.6.14:rc4 | 2.6.14:rc5 | 2.6.14.1 | 2.6.14.2 | 2.6.14.3 | 2.6.14.4 | 2.6.14.5 | 2.6.14.6 | 2.6.14.7 | 2.6.15 | 2.6.15:rc1 | 2.6.15:rc3 | 2.6.15:rc4 | 2.6.15:rc5 | 2.6.15:rc6 | 2.6.15:rc7 | 2.6.15.1 | 2.6.15.2 | 2.6.15.3 | 2.6.15.4 | 2.6.15.5 | 2.6.15.6 | 2.6.15.7 | 2.6.16 | 2.6.16:rc1 | 2.6.16:rc2 | 2.6.16:rc3 | 2.6.16:rc4 | 2.6.16:rc5 | 2.6.16:rc6 | 2.6.16.1 | 2.6.16.2 | 2.6.16.3 | 2.6.16.4 | 2.6.16.5 | 2.6.16.6 | 2.6.16.7 | 2.6.16_rc7 | 2.6_test9_cvs

1 vendor · 1 product

References

49 links
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