9.8

CVE-2024-53206: linux Use After Free

CVSS: 9.8v3.1CriticalModified
AliasesUBUNTU-CVE-2024-53206DEBIAN-CVE-2024-53206
Published 27-12-2024Last modified 05-08-2026
Open JSON

Vulnerability summary

CVE-2024-53206 is a critical (CVSS 9.8) Use After Free vulnerability in linux. EPSS estimates a 0.63% chance of exploitation in the next 30 days, higher than 49.3% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.63%
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 22 · Related 21
DLA-4076-1SUSE-SU-2025:0117-1SUSE-SU-2025:0153-1SUSE-SU-2025:0154-1SUSE-SU-2025:0201-1SUSE-SU-2025:0201-2

Timeline

  1. 27-12-2024
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: tcp: Fix use-after-free of nreq in reqsk_timer_handler(). The cited commit replaced inet_csk_reqsk_queue_drop_and_put() with __inet_csk_reqsk_queue_drop() and reqsk_put() in reqsk_timer_handler(). Then, oreq should be passed to reqsk_put() instead of req; otherwise use-after-free of nreq could happen when reqsk is migrated but the retry attempt failed (e.g. due to timeout). Let's pass oreq to reqsk_put().

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.63%

Chance of exploitation in the next 30 days

Percentile

49%

Versus all other CVEs

30-day change

0.00 pp

From 0.63% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.63%

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

Ubuntu97 products
  • linux< 5.15.0-135.146
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.15.0-1080.87
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 8459d61fbf24967839a70235165673148c7c7f17, < 2dcc86fefe09ac853158afd96b60d544af115dc5 | ≥ 5071beb59ee416e8ab456ac8647a4dabcda823b1, < 9a3c1ad93e6fba67b3a637cfa95a57a6685e4908 | ≥ 997ae8da14f1639ce6fb66a063dab54031cd61b3, < 65ed89cad1f57034c256b016e89e8c0a4ec7c65b | ≥ 51e34db64f4e43c7b055ccf881b7f3e0c31bb26d, < d0eb14cb8c08b00c36a3d5dc57a6f428b301f721 | ≥ e8c526f2bdf1845bedaf6a478816a3d06fa78b8f, < 6d845028609a4af0ad66f499ee0bd5789122b067 | ≥ e8c526f2bdf1845bedaf6a478816a3d06fa78b8f, < c31e72d021db2714df03df6c42855a1db592716c | 106e457953315e476b3642ef24be25ed862aaba3 | c964bf65f80a14288d767023a1b300b30f5b9cd0 | ≥ 5.15.170, < 5.15.174 | ≥ 6.1.115, < 6.1.120 | ≥ 6.6.59, < 6.6.64 | ≥ 6.11.6, < 6.11.11 | ≥ 5.4.293, < 5.5 | ≥ 5.10.237, < 5.11 | 6.12
  • linux_kernel≥ 5.15.170, < 5.15.174 | ≥ 6.1.115, < 6.1.120 | ≥ 6.6.59, < 6.6.64 | ≥ 6.11.6, < 6.11.11 | ≥ 6.12, < 6.12.2
Debian1 product
  • linux< 6.1.123-1 | < 6.12.3-1

3 vendors · 100 products

References

20 links
Show all 20 references