5.5

CVE-2024-42315: exfat: fix potential deadlock on __exfat_get_dentry_set

Modified
AliasesUBUNTU-CVE-2024-42315DEBIAN-CVE-2024-42315
Published 17-08-2024Last modified 23-05-2026

Vulnerability summary

CVE-2024-42315 is a medium (CVSS 5.5) Improper Locking vulnerability in linux. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 5.9% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.17%
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 29 · Related 24
DLA-4075-1DLA-4076-1MGASA-2024-0309MGASA-2024-0310RHSA-2025:6966SUSE-SU-2024:3190-1

Timeline

  1. 17-08-2024
    PublishedVulnerability first disclosed.
  2. 23-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: exfat: fix potential deadlock on __exfat_get_dentry_set When accessing a file with more entries than ES_MAX_ENTRY_NUM, the bh-array is allocated in __exfat_get_entry_set. The problem is that the bh-array is allocated with GFP_KERNEL. It does not make sense. In the following cases, a deadlock for sbi->s_lock between the two processes may occur. CPU0 CPU1 ---- ---- kswapd balance_pgdat lock(fs_reclaim) exfat_iterate lock(&sbi->s_lock) exfat_readdir exfat_get_uniname_from_ext_entry exfat_get_dentry_set __exfat_get_dentry_set kmalloc_array ... lock(fs_reclaim) ... evict exfat_evict_inode lock(&sbi->s_lock) To fix this, let's allocate bh-array with GFP_NOFS.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

6%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.17% 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, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu117 products
  • linux< 5.15.0-135.146 | < 6.8.0-50.51
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1080.87 | < 6.8.0-1020.22
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ bd3bdb9e0d656f760b11d0c638d35d7f7068144d, < 632fb232b6bbf8277edcbe9ecd4b4d98ecb122eb | ≥ 92dcd7d6c6068bf4fd35a6f64d606e27d634807e, < c052f775ee6ccacd3c97e4cf41a2a657e63d4259 | ≥ d8fe01ad2d8ab33aaf8f2efad9e8f1dae11c4b0c, < cd1c7858641384191ff7033fb1fc65dfcd559c6f | ≥ a3ff29a95fde16906304455aa8c0bd84eb770258, < a7ac198f8dba791e3144c4da48a5a9b95773ee4b | ≥ a3ff29a95fde16906304455aa8c0bd84eb770258, < 1d1970493c289e3f44b9ec847ed26a5dbdf56a62 | ≥ a3ff29a95fde16906304455aa8c0bd84eb770258, < 89fc548767a2155231128cb98726d6d2ea1256c9 | ≥ 5.10.190, < 5.10.232 | ≥ 5.15.150, < 5.15.175 | 6.2
  • linux_kernel≥ 6.2, < 6.6.44 | ≥ 6.7, < 6.10.3
Debian1 product
  • linux< 6.1.123-1 | < 6.10.3-1

3 vendors · 120 products

References

29 links
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