CVE-2026-74433: linux
CVSS: 9.8v3.1CriticalReceived
AliasesUBUNTU-CVE-2026-74433DEBIAN-CVE-2026-74433
Published 15-08-2026Last modified 17-08-2026
Vulnerability summary
CVE-2026-74433 is a critical (CVSS 9.8) vulnerability in linux. EPSS estimates a 0.65% chance of exploitation in the next 30 days, higher than 50.1% of scored vulnerabilities.
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)EPSS score
0.65%
0%100%
Low · +0.30 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 6 · Related 6Timeline
- 15-08-2026PublishedVulnerability first disclosed.
- 17-08-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix UAF in rxgk_issue_challenge() Fix rxgk_issue_challenge() to free the page containing the challenge content after invoking the tracepoint as the whdr passed to the tracepoint points into the page just freed.
CVSS metrics
5 scores · 4 sources · 2 versionsMedium 6.3Preferred score · OSV · Ubuntu (Ecosystem advisory) · calculated from vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:NSourcesSingle source
Critical 9.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesAll 4 agree
- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- NVDNIST9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.65%
Chance of exploitation in the next 30 days
Percentile
50%
Versus all other CVEs
30-day change
+0.30 pp
From 0.35% on 19-09-2026
19-09-202619-10-2026
EPSS score0.65%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Ubuntu120 products
- linux< 7.0.0-34.34
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 7.0.0-1013.13
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Debian1 product
- linux< 7.1.5-1
Linux1 product
- linux≥ 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a, < 844b8525ce503405c462ad67f750bec648720397 | ≥ 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a, < 83bb0ed050e2ad9453d8ef50e4d6e624eac6eed8 | ≥ 9d1d2b59341f58126a69b51f9f5f8ccb9f12e54a, < 107a4cb0d47e735830f852d83970d5c81f8e1e08 | 6.16
3 vendors · 122 products
