7.5

CVE-2024-56688: linux NULL Pointer Dereference

CVSS: 7.5v3.1HighModified
AliasesUBUNTU-CVE-2024-56688DEBIAN-CVE-2024-56688
Published 28-12-2024Last modified 05-08-2026
Open JSON

Vulnerability summary

CVE-2024-56688 is a high (CVSS 7.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.54% chance of exploitation in the next 30 days, higher than 44.3% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.54%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 44 · Related 43
DLA-4075-1DLA-4076-1RHSA-2025:6966SUSE-SU-2025:0289-1SUSE-SU-2025:0428-1SUSE-SU-2025:0499-1

Timeline

  1. 28-12-2024
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: sunrpc: clear XPRT_SOCK_UPD_TIMEOUT when reset transport Since transport->sock has been set to NULL during reset transport, XPRT_SOCK_UPD_TIMEOUT also needs to be cleared. Otherwise, the xs_tcp_set_socket_timeouts() may be triggered in xs_tcp_send_request() to dereference the transport->sock that has been set to NULL.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.54%

Chance of exploitation in the next 30 days

Percentile

44%

Versus all other CVEs

30-day change

0.00 pp

From 0.54% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.54%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu133 products
  • linuxAll versions (No fix recorded) | < 5.4.0-211.231 | < 5.15.0-135.146 | < 6.8.0-58.60
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1142.152 | < 5.15.0-1080.87 | < 6.8.0-1027.29
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 7196dbb02ea05835b9ee56910ee82cb55422c7f1, < cc91d59d34ff6a6fee1c0b48612081a451e05e9a | ≥ 7196dbb02ea05835b9ee56910ee82cb55422c7f1, < 86a1f9fa24804cd7f9d7dd3f24af84fc7f8ec02e | ≥ 7196dbb02ea05835b9ee56910ee82cb55422c7f1, < fe6cbf0b2ac3cf4e21824a44eaa336564ed5e960 | ≥ 7196dbb02ea05835b9ee56910ee82cb55422c7f1, < 87a95ee34a48dfad198a2002e4966e1d63d53f2b | ≥ 7196dbb02ea05835b9ee56910ee82cb55422c7f1, < 3811172e8c98ceebd12fe526ca6cb37a1263c964 | ≥ 7196dbb02ea05835b9ee56910ee82cb55422c7f1, < 638a8fa5a7e641f9401346c57e236f02379a0c40 | ≥ 7196dbb02ea05835b9ee56910ee82cb55422c7f1, < 66d11ca91bf5100ae2e6b5efad97e58d8448843a | ≥ 7196dbb02ea05835b9ee56910ee82cb55422c7f1, < 4db9ad82a6c823094da27de4825af693a3475d51 | 4.11
  • linux_kernel≥ 4.11, < 5.4.287 | ≥ 5.5, < 5.10.231 | ≥ 5.11, < 5.15.174 | ≥ 5.16, < 6.1.120 | ≥ 6.2, < 6.6.64 | ≥ 6.7, < 6.11.11 | ≥ 6.12, < 6.12.2
Debian1 product
  • linux< 6.1.123-1 | < 6.12.3-1

3 vendors · 136 products

References

49 links
Show all 49 references