7.5

CVE-2023-52513: RDMA/siw: Fix connection failure handling

Modified
AliasesUBUNTU-CVE-2023-52513DEBIAN-CVE-2023-52513
Published 02-03-2024Last modified 05-08-2026

Vulnerability summary

CVE-2023-52513 is a high (CVSS 7.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.66% chance of exploitation in the next 30 days, higher than 51.6% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 7.5 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.66%
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 9 · Related 5
RHSA-2024:3618RHSA-2024:3627RHSA-2024:9315RHSA-2026:0173SUSE-SU-2024:1320-1SUSE-SU-2024:1321-1

Timeline

  1. 02-03-2024
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/siw: Fix connection failure handling In case immediate MPA request processing fails, the newly created endpoint unlinks the listening endpoint and is ready to be dropped. This special case was not handled correctly by the code handling the later TCP socket close, causing a NULL dereference crash in siw_cm_work_handler() when dereferencing a NULL listener. We now also cancel the useless MPA timeout, if immediate MPA request processing fails. This patch furthermore simplifies MPA processing in general: Scheduling a useless TCP socket read in sk_data_ready() upcall is now surpressed, if the socket is already moved out of TCP_ESTABLISHED state.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.66%

Chance of exploitation in the next 30 days

Percentile

52%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.66% 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: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu110 products
  • linux< 5.4.0-171.189 | < 5.15.0-94.104
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.4.0-1118.128 | < 5.15.0-1053.58
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 6c52fdc244b5ccc468006fd65a504d4ee33743c7, < 6e26812e289b374c17677d238164a5a8f5770594 | ≥ 6c52fdc244b5ccc468006fd65a504d4ee33743c7, < 0d520cdb0cd095eac5d00078dfd318408c9b5eed | ≥ 6c52fdc244b5ccc468006fd65a504d4ee33743c7, < 81b7bf367eea795d259d0261710c6a89f548844d | ≥ 6c52fdc244b5ccc468006fd65a504d4ee33743c7, < 5cf38e638e5d01b68f9133968a85e8b3fd1ecf2f | ≥ 6c52fdc244b5ccc468006fd65a504d4ee33743c7, < eeafc50a77f6a783c2c44e7ec3674a7b693e06f8 | ≥ 6c52fdc244b5ccc468006fd65a504d4ee33743c7, < 53a3f777049771496f791504e7dc8ef017cba590 | 5.3
  • linux_kernel≥ 5.3, < 5.4.258 | ≥ 5.5, < 5.10.198 | ≥ 5.11, < 5.15.135 | ≥ 5.16, < 6.1.57 | ≥ 6.2, < 6.5.7 | 6.6:rc1 | 6.6:rc2 | 6.6:rc3 | 6.6:rc4
Debian1 product
  • linux< 6.1.64-1 | < 6.5.8-1

3 vendors · 113 products

References

10 links