7.8

CVE-2024-38555: linux Use After Free

CVSS: 7.8v3.1HighModified
AliasesUBUNTU-CVE-2024-38555DEBIAN-CVE-2024-38555
Published 19-06-2024Last modified 05-08-2026
Open JSON

Vulnerability summary

CVE-2024-38555 is a high (CVSS 7.8) Use After Free vulnerability in linux. EPSS estimates a 0.26% chance of exploitation in the next 30 days, higher than 16.7% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (NVD)
EPSS score
0.26%
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 34 · Related 23
DSA-5730-1MGASA-2024-0263MGASA-2024-0266RHSA-2024:10771RHSA-2024:5065RHSA-2024:5101

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: net/mlx5: Discard command completions in internal error Fix use after free when FW completion arrives while device is in internal error state. Avoid calling completion handler in this case, since the device will flush the command interface and trigger all completions manually. Kernel log: ------------[ cut here ]------------ refcount_t: underflow; use-after-free. ... RIP: 0010:refcount_warn_saturate+0xd8/0xe0 ... Call Trace: <IRQ> ? __warn+0x79/0x120 ? refcount_warn_saturate+0xd8/0xe0 ? report_bug+0x17c/0x190 ? handle_bug+0x3c/0x60 ? exc_invalid_op+0x14/0x70 ? asm_exc_invalid_op+0x16/0x20 ? refcount_warn_saturate+0xd8/0xe0 cmd_ent_put+0x13b/0x160 [mlx5_core] mlx5_cmd_comp_handler+0x5f9/0x670 [mlx5_core] cmd_comp_notifier+0x1f/0x30 [mlx5_core] notifier_call_chain+0x35/0xb0 atomic_notifier_call_chain+0x16/0x20 mlx5_eq_async_int+0xf6/0x290 [mlx5_core] notifier_call_chain+0x35/0xb0 atomic_notifier_call_chain+0x16/0x20 irq_int_handler+0x19/0x30 [mlx5_core] __handle_irq_event_percpu+0x4b/0x160 handle_irq_event+0x2e/0x80 handle_edge_irq+0x98/0x230 __common_interrupt+0x3b/0xa0 common_interrupt+0x7b/0xa0 </IRQ> <TASK> asm_common_interrupt+0x22/0x40

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.26%

Chance of exploitation in the next 30 days

Percentile

17%

Versus all other CVEs

30-day change

0.00 pp

From 0.26% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.26%

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

Ubuntu116 products
  • linux< 5.15.0-121.131 | < 6.8.0-40.40
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1069.75 | < 6.8.0-1013.14
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 27c79b3a9212cf4ba634c157e07d29548181a208, < f6fbb8535e990f844371086ab2c1221f71f993d3 | ≥ 51d138c2610a236c1ed0059d034ee4c74f452b86, < 3cb92b0ad73d3f1734e812054e698d655e9581b0 | ≥ 51d138c2610a236c1ed0059d034ee4c74f452b86, < bf8aaf0ae01c27ae3c06aa8610caf91e50393396 | ≥ 51d138c2610a236c1ed0059d034ee4c74f452b86, < 1337ec94bc5a9eed250e33f5f5c89a28a6bfabdb | ≥ 51d138c2610a236c1ed0059d034ee4c74f452b86, < 1d5dce5e92a70274de67a59e1e674c3267f94cd7 | ≥ 51d138c2610a236c1ed0059d034ee4c74f452b86, < 7ac4c69c34240c6de820492c0a28a0bd1494265a | ≥ 51d138c2610a236c1ed0059d034ee4c74f452b86, < db9b31aa9bc56ff0d15b78f7e827d61c4a096e40 | 2e5d24b3bf091802c5456dc8f8f6a6be4493c8ca | ≥ 5.10.20, < 5.10.219 | ≥ 5.11.3, < 5.12 | 5.12
  • linux_kernel≥ 5.10.20, < 5.10.219 | ≥ 5.12, < 5.15.161 | ≥ 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 · 119 products

References

22 links
Show all 22 references