Answer in brief
CVE-2021-47388 records a High severity (CVSS 8.8) vulnerability in mac80211: fix use-after-free in CCMP/GCMP RX. 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.
Answer in brief
CVE-2021-47388 records a High severity (CVSS 8.8) vulnerability in mac80211: fix use-after-free in CCMP/GCMP RX. 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 8.8. 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:5.15:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=608b0a2ae928a74a2f89e02227339dd79cdb63cf <447d001b875d0e7f211c4ba004916028da994258 || >=d0f613fe6de344dc17ba04a88921a2094c13d3fa <31de381aef0ab1b342f62485118dc8a19363dc78 || >=a9b57952fed41556c950a92123086724eaf11919 <f556e1d6fb9f2923a9a36f3df638c7d79ba09dbb || >=0f716b48ed25503e6961f4b5b40ece36f7e4ed26 <3d5d629c99c468458022e9b381789de3595bf4dd || >=c8b3a6150dc8ac78d5fdd5fbdfc4806249ef8b2c <50149e0866a82cef33e680ee68dc380a5bc75d32 || >=e64ea0597050157f926ac2ba9b478a44ee5be945 <57de2dcb18742dc2860861c9f496da7d42b67da0 || >=bf30ca922a0c0176007e074b0acc77ed345e9990 <27d3eb5616ee2c0a3b30c3fa34813368ed1f3dc9 || >=bf30ca922a0c0176007e074b0acc77ed345e9990 <94513069eb549737bcfc3d988d6ed4da948a2de8 || 1f0bf30c01d3f4de7d6c5e27b102a808c5646676 || >=4.4.271 <4.4.286 || >=4.9.271 <4.9.285 || >=4.14.235 <4.14.249 || >=4.19.193 <4.19.209 || >=5.4.124 <5.4.151 || >=5.10.42 <5.10.71 || >=5.12.9 <5.13 | 447d001b875d0e7f211c4ba004916028da994258, 31de381aef0ab1b342f62485118dc8a19363dc78, f556e1d6fb9f2923a9a36f3df638c7d79ba09dbb, 3d5d629c99c468458022e9b381789de3595bf4dd, 50149e0866a82cef33e680ee68dc380a5bc75d32, 57de2dcb18742dc2860861c9f496da7d42b67da0, 27d3eb5616ee2c0a3b30c3fa34813368ed1f3dc9, 94513069eb549737bcfc3d988d6ed4da948a2de8, 4.4.286, 4.9.285, 4.14.249, 4.19.209, 5.4.151, 5.10.71, 5.13 |
| Linux/Linuxgeneric | 5.13 | Not reported |
Published upstream
May 21, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
In the Linux kernel, the following vulnerability has been resolved: mac80211: fix use-after-free in CCMP/GCMP RX When PN checking is done in mac80211, for fragmentation we need to copy the PN to the RX struct so we can later use it to do a comparison, since commit bf30ca922a0c ("mac80211: check defrag PN against current frame"). Unfortunately, in that commit I used the 'hdr' variable without it being necessarily valid, so use-after-free could occur if it was necessary to reallocate (parts of) the frame. Fix this by reloading the variable after the code that results in the reallocations, if any. This fixes https://bugzilla.kernel.org/show_bug.cgi?id=214401.
Quoted source text, attributed separately from HOL analysis.
CVSS is 8.8. 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:5.15:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=608b0a2ae928a74a2f89e02227339dd79cdb63cf <447d001b875d0e7f211c4ba004916028da994258 || >=d0f613fe6de344dc17ba04a88921a2094c13d3fa <31de381aef0ab1b342f62485118dc8a19363dc78 || >=a9b57952fed41556c950a92123086724eaf11919 <f556e1d6fb9f2923a9a36f3df638c7d79ba09dbb || >=0f716b48ed25503e6961f4b5b40ece36f7e4ed26 <3d5d629c99c468458022e9b381789de3595bf4dd || >=c8b3a6150dc8ac78d5fdd5fbdfc4806249ef8b2c <50149e0866a82cef33e680ee68dc380a5bc75d32 || >=e64ea0597050157f926ac2ba9b478a44ee5be945 <57de2dcb18742dc2860861c9f496da7d42b67da0 || >=bf30ca922a0c0176007e074b0acc77ed345e9990 <27d3eb5616ee2c0a3b30c3fa34813368ed1f3dc9 || >=bf30ca922a0c0176007e074b0acc77ed345e9990 <94513069eb549737bcfc3d988d6ed4da948a2de8 || 1f0bf30c01d3f4de7d6c5e27b102a808c5646676 || >=4.4.271 <4.4.286 || >=4.9.271 <4.9.285 || >=4.14.235 <4.14.249 || >=4.19.193 <4.19.209 || >=5.4.124 <5.4.151 || >=5.10.42 <5.10.71 || >=5.12.9 <5.13 | 447d001b875d0e7f211c4ba004916028da994258, 31de381aef0ab1b342f62485118dc8a19363dc78, f556e1d6fb9f2923a9a36f3df638c7d79ba09dbb, 3d5d629c99c468458022e9b381789de3595bf4dd, 50149e0866a82cef33e680ee68dc380a5bc75d32, 57de2dcb18742dc2860861c9f496da7d42b67da0, 27d3eb5616ee2c0a3b30c3fa34813368ed1f3dc9, 94513069eb549737bcfc3d988d6ed4da948a2de8, 4.4.286, 4.9.285, 4.14.249, 4.19.209, 5.4.151, 5.10.71, 5.13 |
| Linux/Linuxgeneric | 5.13 | Not reported |
Published upstream
May 21, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
In the Linux kernel, the following vulnerability has been resolved: mac80211: fix use-after-free in CCMP/GCMP RX When PN checking is done in mac80211, for fragmentation we need to copy the PN to the RX struct so we can later use it to do a comparison, since commit bf30ca922a0c ("mac80211: check defrag PN against current frame"). Unfortunately, in that commit I used the 'hdr' variable without it being necessarily valid, so use-after-free could occur if it was necessary to reallocate (parts of) the frame. Fix this by reloading the variable after the code that results in the reallocations, if any. This fixes https://bugzilla.kernel.org/show_bug.cgi?id=214401.
Quoted source text, attributed separately from HOL analysis.