Answer in brief
CVE-2026-64256 records a Medium severity (CVSS 5.5) vulnerability in xfs: don't wrap around quota ids in dqiterate. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.2:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.2:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.2:rc3:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=21d7500929c8a0b10e22a6755850c6f9a9280284 <249e311c2ba392ceaf9ebfc145a46922946f069a || >=21d7500929c8a0b10e22a6755850c6f9a9280284 <d1c4c40599c376aeb0c93068a2ae344e79ee4b90 || >=21d7500929c8a0b10e22a6755850c6f9a9280284 <2b14fe1e0924c6b901f4256456342569c5397abe || >=21d7500929c8a0b10e22a6755850c6f9a9280284 <d766e4e5e85d829629c3ba503802fe1303d7b591 | 249e311c2ba392ceaf9ebfc145a46922946f069a, d1c4c40599c376aeb0c93068a2ae344e79ee4b90, 2b14fe1e0924c6b901f4256456342569c5397abe, d766e4e5e85d829629c3ba503802fe1303d7b591 |
| Linux/Linuxgeneric | 6.8 | Not reported |
Published upstream
Jul 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 12, 2026
In the Linux kernel, the following vulnerability has been resolved: xfs: don't wrap around quota ids in dqiterate LOLLM noticed that q_id is an unsigned 32-bit variable. If it happens to be set to XFS_DQ_ID_MAX due to a filesystem that actually has a dquot for ID_MAX, then this addition will truncate to zero and the iteration starts over. Fix this by casting to u64.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-64256 records a Medium severity (CVSS 5.5) vulnerability in xfs: don't wrap around quota ids in dqiterate. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.2:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.2:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.2:rc3:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=21d7500929c8a0b10e22a6755850c6f9a9280284 <249e311c2ba392ceaf9ebfc145a46922946f069a || >=21d7500929c8a0b10e22a6755850c6f9a9280284 <d1c4c40599c376aeb0c93068a2ae344e79ee4b90 || >=21d7500929c8a0b10e22a6755850c6f9a9280284 <2b14fe1e0924c6b901f4256456342569c5397abe || >=21d7500929c8a0b10e22a6755850c6f9a9280284 <d766e4e5e85d829629c3ba503802fe1303d7b591 | 249e311c2ba392ceaf9ebfc145a46922946f069a, d1c4c40599c376aeb0c93068a2ae344e79ee4b90, 2b14fe1e0924c6b901f4256456342569c5397abe, d766e4e5e85d829629c3ba503802fe1303d7b591 |
| Linux/Linuxgeneric | 6.8 | Not reported |
Published upstream
Jul 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 12, 2026
In the Linux kernel, the following vulnerability has been resolved: xfs: don't wrap around quota ids in dqiterate LOLLM noticed that q_id is an unsigned 32-bit variable. If it happens to be set to XFS_DQ_ID_MAX due to a filesystem that actually has a dquot for ID_MAX, then this addition will truncate to zero and the iteration starts over. Fix this by casting to u64.
Quoted source text, attributed separately from HOL analysis.