8.4

CVE-2021-47240: net: qrtr: fix OOB Read in qrtr_endpoint_post

Modified
AliasesUBUNTU-CVE-2021-47240DEBIAN-CVE-2021-47240
Published 21-05-2024Last modified 05-08-2026

Vulnerability summary

CVE-2021-47240 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 15.3% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 8.4, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
8.4/10
010
High · v3.1 (CVE.org)
EPSS score
0.24%
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 4 · Related 4
SUSE-SU-2024:2010-1SUSE-SU-2024:2183-1SUSE-SU-2024:2185-1SUSE-SU-2025:01995-1

Timeline

  1. 21-05-2024
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: net: qrtr: fix OOB Read in qrtr_endpoint_post Syzbot reported slab-out-of-bounds Read in qrtr_endpoint_post. The problem was in wrong _size_ type: if (len != ALIGN(size, 4) + hdrlen) goto err; If size from qrtr_hdr is 4294967293 (0xfffffffd), the result of ALIGN(size, 4) will be 0. In case of len == hdrlen and size == 4294967293 in header this check won't fail and skb_put_data(skb, data + hdrlen, size); will read out of bound from data, which is hdrlen allocated block.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

15%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.24% 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, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu85 products
  • linux< 4.15.0-156.163 | < 5.4.0-81.91
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 4.15.0-1111.118 | < 5.4.0-1055.58
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 194ccc88297ae78d0803adad83c6dcc369787c9e, < f8111c0d7ed42ede41a3d0d393b104de0730a8a6 | ≥ 194ccc88297ae78d0803adad83c6dcc369787c9e, < 26b8d10703a9be45d6097946b2b4011f7dd2c56f | ≥ 194ccc88297ae78d0803adad83c6dcc369787c9e, < 960b08dd36de1e341e3eb43d1c547513e338f4f8 | ≥ 194ccc88297ae78d0803adad83c6dcc369787c9e, < 19892ab9c9d838e2e5a7744d36e4bb8b7c3292fe | ≥ 194ccc88297ae78d0803adad83c6dcc369787c9e, < ad9d24c9429e2159d1e279dc3a83191ccb4daf1d | 4.15
  • linux_kernel≥ 4.15, < 4.19.196 | ≥ 4.20, < 5.4.128 | ≥ 5.5, < 5.10.46 | ≥ 5.11, < 5.12.13 | 5.13:rc1 | 5.13:rc2 | 5.13:rc3 | 5.13:rc4 | 5.13:rc5 | 5.13:rc6
Debian1 product
  • linux< 5.10.46-1

3 vendors · 88 products

References

9 links