igbvf: Fix leak in TX DMA error cleanup
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 4 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.
Summary
In the Linux kernel, the following vulnerability has been resolved: igbvf: Fix leak in TX DMA error cleanup If an error is encountered while mapping TX buffers, the driver should unmap any buffers already mapped for that skb. Because count is incremented before each frag mapping, it will always match the correct number of unmappings needed when dma_error is reached. Decrementing count before the while loop in dma_error causes an off-by-one error. If any mapping was successful before an unsuccessful mapping, exactly one DMA mapping (the head) would leak. This bug was introduced by a 2010 fix for an endless loop in dma_error. All other affected drivers have already been fixed.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 2.6.33 and later | 5.10.265, 5.15.216, 6.1.183, 6.6.151, 6.12.103, 6.18.44, 7.1.8, 7.2 | Patch available | CNA |
- Linux VendorLinux Affected 2.6.33 and later Fixed in 5.10.265, 5.15.216, 6.1.183, 6.6.151, 6.12.103, 6.18.44, 7.1.8, 7.2 Patch available CNA
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.265, 5.15.216, 6.1.183, 6.6.151, 6.12.103, 6.18.44, 7.1.8, 7.2
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 7 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
Not affected: 1 product
- Red Hat Enterprise Linux 6
Timeline
- 2026-10-02 Threatist record created from CVE-2026-74495
- 2026-10-03 Alias added: GHSA-7vcq-2p5f-22mh
- 2026-10-13 EPSS moved to the below the 50th percentile
- 2026-10-18 CISA SSVC decision points changed
References
Other 8
- https://git.kernel.org/stable/c/e42b7225c45f57b42306b80cdd3bda202bae7293
- https://git.kernel.org/stable/c/e3ed89c257f6361f13df23023cd10ace830330ad
- https://git.kernel.org/stable/c/56726ff12cb6759ab90d6f5332c2377aeca7d249
- https://git.kernel.org/stable/c/31089f4eab42e0fc248ec80c26f9b0bad59ba4cc
- https://git.kernel.org/stable/c/bc25d56c03e41c10bc4b40e99ca5d7b941675c04
- https://git.kernel.org/stable/c/845a9cdd9b03b7b6fa8de3ee80579780350a7f65
- https://git.kernel.org/stable/c/df07003b5a6c6c9fce60d765d6a3da815a74c41c
- https://git.kernel.org/stable/c/0565052b7e2f436b7f1541f4849da96dc0aa7a0e
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Sources
- CVE-2026-74495 · CVE Program
- CVE-2026-74495 · NVD
- FIRST EPSS
- GHSA-7vcq-2p5f-22mh · GitHub Advisory Database · CC BY 4.0
- CVE-2026-74495 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences