5.5

CVE-2022-49611: x86/speculation: Fill RSB on vmexit for IBRS

Analyzed
AliasesUBUNTU-CVE-2022-49611DEBIAN-CVE-2022-49611
Published 26-02-2025Last modified 23-05-2026

Vulnerability summary

CVE-2022-49611 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.28% chance of exploitation in the next 30 days, higher than 21% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.28%
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 10 · Related 7
RHSA-2022:7110RHSA-2022:7683RHSA-2022:8973SUSE-SU-2025:1027-1SUSE-SU-2025:1176-1SUSE-SU-2025:1183-1

Timeline

  1. 26-02-2025
    PublishedVulnerability first disclosed.
  2. 23-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: x86/speculation: Fill RSB on vmexit for IBRS Prevent RSB underflow/poisoning attacks with RSB. While at it, add a bunch of comments to attempt to document the current state of tribal knowledge about RSB attacks and what exactly is being mitigated.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.28%

Chance of exploitation in the next 30 days

Percentile

21%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.28% 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.

Ubuntu111 products
  • linuxAll versions (No fix recorded) | < 4.4.0-242.276 | < 4.15.0-204.215 | < 5.4.0-132.148 | < 5.15.0-46.49
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 4.4.0-1120.126 | < 4.4.0-1158.173 | < 4.15.0-1150.163 | < 5.4.0-1089.97 | < 5.15.0-1017.21
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ b9cdaaf0a3becc52e8b4662fef28c452c4f009b4, < 3d323b99ff5c8c57005184056d65f6af5b0479d8 | ≥ 117cc7a908c83697b0b737d15ae1eb5943afe35b, < f744b88dfc201bf8092833ec70b23c720188b527 | ≥ 117cc7a908c83697b0b737d15ae1eb5943afe35b, < 17a9fc4a7b91f8599223631bb6ae6416bc0de1c0 | ≥ 117cc7a908c83697b0b737d15ae1eb5943afe35b, < 4d7f72b6e1bc630bec7e4cd51814bc2b092bf153 | ≥ 117cc7a908c83697b0b737d15ae1eb5943afe35b, < 8d5cff499a6d740c91ff37963907e0e983c37f0f | ≥ 117cc7a908c83697b0b737d15ae1eb5943afe35b, < 8c38306e2e9257af4af2819aa287a4711ff36329 | ≥ 117cc7a908c83697b0b737d15ae1eb5943afe35b, < 9756bba28470722dacb79ffce554336dd1f6a6cd | 68d1f7a3f1a35639a563bbad768d5df885b4ff05 | 20e080e2752d108388d386ecc0b33d7797dfb18f | eebc3f8adee0a6f43a4789ef0bf5c5b35de8cfe4 | c1ddd99a029636e234a800f28790a60d6ac0318f | ≥ 4.14.14, < 4.14.297 | ≥ 3.2.101, < 3.3 | ≥ 3.16.56, < 3.17 | ≥ 4.4.113, < 4.5 | ≥ 4.9.77, < 4.10 | 4.15
  • linux_kernel< 4.14.297 | ≥ 4.15, < 4.19.266 | ≥ 4.20, < 5.4.217 | ≥ 5.5, < 5.10.133 | ≥ 5.11, < 5.15.57 | ≥ 5.16, < 5.18.14 | 5.19:rc1 | 5.19:rc2 | 5.19:rc3 | 5.19:rc4 | 5.19:rc5 | 5.19:rc6
Debian1 product
  • linux< 5.18.14-1

3 vendors · 114 products

References

11 links
Show all 11 references