7.5

CVE-2024-53217: NFSD: Prevent NULL dereference in nfsd4_process_cb_update()

Modified
AliasesUBUNTU-CVE-2024-53217DEBIAN-CVE-2024-53217
Published 27-12-2024Last modified 15-10-2026

Vulnerability summary

CVE-2024-53217 is a high (CVSS 7.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.73% chance of exploitation in the next 30 days, higher than 54.3% 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
0.73%
0%100%
Low · +0.03 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 56 · Related 55
DLA-4075-1DLA-4076-1LSN-0116-1LSN-0117-1SUSE-SU-2025:0117-1SUSE-SU-2025:0153-1

Timeline

  1. 27-12-2024
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: NFSD: Prevent NULL dereference in nfsd4_process_cb_update() @ses is initialized to NULL. If __nfsd4_find_backchannel() finds no available backchannel session, setup_callback_client() will try to dereference @ses and segfault.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.73%

Chance of exploitation in the next 30 days

Percentile

54%

Versus all other CVEs

30-day change

Increase +0.03 pp

From 0.70% 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.

Ubuntu134 products
  • linux< 3.13.0-211.262 | < 4.4.0-276.310 | < 4.15.0-245.257 | < 5.4.0-211.231 | < 5.15.0-135.146 | < 6.8.0-58.60
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 4.4.0-1150.156 | < 4.4.0-1188.203 | < 4.15.0-1187.200 | < 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≥ dcbeaa68dbbdacbbb330a86c7fc95a28473fc209, < d9a0d1f6e15859ea7a86a327f28491e23deaaa62 | ≥ dcbeaa68dbbdacbbb330a86c7fc95a28473fc209, < cac1405e3ff6685a438e910ad719e0cf06af90ee | ≥ dcbeaa68dbbdacbbb330a86c7fc95a28473fc209, < 752a75811f27300fe8131b0a1efc91960f6f88e7 | ≥ dcbeaa68dbbdacbbb330a86c7fc95a28473fc209, < c5d90f9302742985a5078e42ac38de42c364c44a | ≥ dcbeaa68dbbdacbbb330a86c7fc95a28473fc209, < 0c3b0e326f838787d229314d4de83af9c53347e8 | ≥ dcbeaa68dbbdacbbb330a86c7fc95a28473fc209, < eb51733ae5fc73d95bd857d5da26f9f65b202a79 | ≥ dcbeaa68dbbdacbbb330a86c7fc95a28473fc209, < 03178cd8f67227015debb700123987fe96275cd1 | ≥ dcbeaa68dbbdacbbb330a86c7fc95a28473fc209, < 4a4ffc1aa9d618e41ad9151f40966e402e58a5a2 | ≥ dcbeaa68dbbdacbbb330a86c7fc95a28473fc209, < 1e02c641c3a43c88cecc08402000418e15578d38 | 2.6.38
  • linux_kernel≥ 2.6.38, < 4.19.325 | ≥ 4.20, < 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 · 137 products

References

61 links
Show all 61 references