CVE-2026-98298dmaengine: mmp_pdma: fix wrong sg length in mmp_pdma_prep_slave_sg()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: dmaengine: mmp_pdma: fix wrong sg length in mmp_pdma_prep_slave_sg() In mmp_pdma_prep_slave_sg(), for_each_sg() iterates the scatterlist putting each entry into 'sg', but the entry length is read from 'sgl' (the list head) instead of 'sg' (the current entry): for_each_sg(sgl, sg, sg_len, i) { addr = sg_dma_address(sg); avail = sg_dma_len(sgl); /* should be 'sg' */ Consequently 'avail' is always the length of the first entry. For multi-sg lists this causes out-of-bounds reads when a later entry is shorter than the first, and silent data loss when it is longer. Single-sg or uniformly-sized lists happen to mask the issue.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 19, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from c8acd6aa6bed3c0fd7898202f4ebc534db9085f2 before f448a5f5bd10d792440a1b08cf2e8f311767032d; from c8acd6aa6bed3c0fd7898202f4ebc534db9085f2 before 2148db529f082d6e3ca95413bf943442f4ef30cc; from c8acd6aa6bed3c0fd7898202f4ebc534db9085f2 before d920c07aa6d89ec11afdb6976aafaee9563a5234; from c8acd6aa6bed3c0fd7898202f4ebc534db9085f2 before 4a33886057e6d127555efb022879c583e966acc5; from c8acd6aa6bed3c0fd7898202f4ebc534db9085f2 before 88a505330eb06128f7ce79a4c5e4832b7601b3d1; from c8acd6aa6bed3c0fd7898202f4ebc534db9085f2 before bae65e4925928f77824ca0103122e2ed20ef5802; from c8acd6aa6bed3c0fd7898202f4ebc534db9085f2 before 54ccc01012a240476edf641bf1a2b8bff54fe6ae; from c8acd6aa6bed3c0fd7898202f4ebc534db9085f2 before 075bc7b1d3dde5ed43fbaabbc1a69f09b7fc3a47 | CNA record |
References
- https://git.kernel.org/stable/c/f448a5f5bd10d792440a1b08cf2e8f311767032d
- https://git.kernel.org/stable/c/2148db529f082d6e3ca95413bf943442f4ef30cc
- https://git.kernel.org/stable/c/d920c07aa6d89ec11afdb6976aafaee9563a5234
- https://git.kernel.org/stable/c/4a33886057e6d127555efb022879c583e966acc5
- https://git.kernel.org/stable/c/88a505330eb06128f7ce79a4c5e4832b7601b3d1
- https://git.kernel.org/stable/c/bae65e4925928f77824ca0103122e2ed20ef5802
- https://git.kernel.org/stable/c/54ccc01012a240476edf641bf1a2b8bff54fe6ae
- https://git.kernel.org/stable/c/075bc7b1d3dde5ed43fbaabbc1a69f09b7fc3a47
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.