CVE-2024-35880: io_uring/kbuf: hold io_buffer_list reference over mmap
Vulnerability summary
CVE-2024-35880 is a high (CVSS 7.8) vulnerability in linux. EPSS estimates a 0.69% chance of exploitation in the next 30 days, higher than 52.7% of scored vulnerabilities.
Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 10 · Related 9Timeline
- 19-05-2024PublishedVulnerability first disclosed.
- 05-08-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: io_uring/kbuf: hold io_buffer_list reference over mmap If we look up the kbuf, ensure that it doesn't get unregistered until after we're done with it. Since we're inside mmap, we cannot safely use the io_uring lock. Rely on the fact that we can lookup the buffer list under RCU now and grab a reference to it, preventing it from being unregistered until we're done with it. The lookup returns the io_buffer_list directly with it referenced.
CVSS metrics
4 scores · 4 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HDiffers
- NVDNIST5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HDiffers
EPSS trend
Probability
0.69%
Chance of exploitation in the next 30 days
Percentile
53%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.69% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu88 products
- linux< 6.8.0-38.38
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 6.8.0-1011.12
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 09f7520048eaaee9709091cd2787966f807da7c5, < 65938e81df2197203bda4b9a0c477e7987218d66 | ≥ 5cf4f52e6d8aa2d3b7728f568abbf9d42a3af252, < 5fd8e2359498043e0b5329a05f02d10a9eb91eb9 | ≥ 5cf4f52e6d8aa2d3b7728f568abbf9d42a3af252, < 561e4f9451d65fc2f7eef564e0064373e3019793 | ≥ 6.6.5, < 6.6.26 | 6.7
- linux_kernelEOL≥ 6.6.5, < 6.6.26 | ≥ 6.7.1, < 6.8.5 | 6.7 | 6.7:rc4 | 6.7:rc5 | 6.7:rc6 | 6.7:rc7 | 6.7:rc8 | 6.9:rc1 | 6.9:rc2
Debian1 product
- linux< 6.8.9-1
3 vendors · 91 products
