9.8

CVE-2024-38544: RDMA/rxe: Fix seg fault in rxe_comp_queue_pkt

Modified
AliasesUBUNTU-CVE-2024-38544DEBIAN-CVE-2024-38544
Published 19-06-2024Last modified 05-08-2026

Vulnerability summary

CVE-2024-38544 is a critical (CVSS 9.8) Use After Free vulnerability in linux. EPSS estimates a 0.81% chance of exploitation in the next 30 days, higher than 57.1% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 9.8 (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
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.81%
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 38 · Related 34
DLA-4075-1MGASA-2024-0263MGASA-2024-0266RHSA-2024:5928SUSE-SU-2024:2360-1SUSE-SU-2024:2372-1

Timeline

  1. 19-06-2024
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Fix seg fault in rxe_comp_queue_pkt In rxe_comp_queue_pkt() an incoming response packet skb is enqueued to the resp_pkts queue and then a decision is made whether to run the completer task inline or schedule it. Finally the skb is dereferenced to bump a 'hw' performance counter. This is wrong because if the completer task is already running in a separate thread it may have already processed the skb and freed it which can cause a seg fault. This has been observed infrequently in testing at high scale. This patch fixes this by changing the order of enqueuing the packet until after the counter is accessed.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.81%

Chance of exploitation in the next 30 days

Percentile

57%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.81% 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.

Ubuntu127 products
  • linuxAll versions (No fix recorded) | < 5.4.0-208.228 | < 5.15.0-127.137 | < 6.8.0-40.40
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1140.150 | < 5.15.0-1073.79 | < 6.8.0-1013.14
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0, < c91fb72a2ca6480d8d77262eef52dc5b178463a3 | ≥ 0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0, < de5a059e36657442b5637cc16df5163e435b9cb4 | ≥ 0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0, < e0e14dd35d4242340c7346aac60c7ff8fbf87ffc | ≥ 0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0, < faa8d0ecf6c9c7c2ace3ca3e552180ada6f75e19 | ≥ 0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0, < 21b4c6d4d89030fd4657a8e7c8110fd941049794 | ≥ 0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0, < bbad88f111a1829f366c189aa48e7e58e57553fc | ≥ 0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0, < 30df4bef8b8e183333e9b6e9d4509d552c7da6eb | ≥ 0b1e5b99a48b5b810e3e38f1d6e0d39306b99ec0, < 2b23b6097303ed0ba5f4bc036a1c07b6027af5c6 | 4.12
  • linux_kernel≥ 4.12, < 5.4.285 | ≥ 5.5, < 5.10.227 | ≥ 5.11, < 5.15.168 | ≥ 5.16, < 6.1.93 | ≥ 6.2, < 6.6.33 | ≥ 6.7, < 6.8.12 | ≥ 6.9, < 6.9.3
Debian1 product
  • linux< 6.1.94-1 | < 6.8.12-1

3 vendors · 130 products

References

36 links
Show all 36 references