CVE-2025-21954
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2025-21954
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-21954.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2025-21954
- Downstream
- Published
- 2025-04-01T15:46:55.226Z
- Modified
- 2025-11-16T14:41:39.104533Z
- Summary
- netmem: prevent TX of unreadable skbs
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
netmem: prevent TX of unreadable skbs
Currently on stable trees we have support for netmem/devmem RX but not TX. It is not safe to forward/redirect an RX unreadable netmem packet into the device's TX path, as the device may call dma-mapping APIs on dma addrs that should not be passed to it.
Fix this by preventing the xmit of unreadable skbs.
Tested by configuring tc redirect:
sudo tc qdisc add dev eth1 ingress sudo tc filter add dev eth1 ingress protocol ip prio 1 flower ipproto \ tcp srcip 192.168.1.12 action mirred egress redirect dev eth1
Before, I see unreadable skbs in the driver's TX path passed to dma mapping APIs.
After, I don't see unreadable skbs in the driver's TX path passed to dma mapping APIs.
- References
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced65249feb6b3df9e17bab5911ee56fa7b0971e231Fixed454825019d2f0c59e5174ece9e713f45ad80beff
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced65249feb6b3df9e17bab5911ee56fa7b0971e231Fixed1c17c8ced25c5fbe424c7ad7ea11d33014a986b1
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced65249feb6b3df9e17bab5911ee56fa7b0971e231Fixedf3600c867c99a2cc8038680ecf211089c50e7971
Affected versions
v6.*
v6.11
v6.11-rc7
v6.12
v6.12-rc1
v6.12-rc2
v6.12-rc3
v6.12-rc4
v6.12-rc5
v6.12-rc6
v6.12-rc7
v6.12.1
v6.12.10
v6.12.11
v6.12.12
v6.12.13
v6.12.14
v6.12.15
v6.12.16
v6.12.17
v6.12.18
v6.12.19
v6.12.2
v6.12.3
v6.12.4
v6.12.5
v6.12.6
v6.12.7
v6.12.8
v6.12.9
v6.13
v6.13-rc1
v6.13-rc2
v6.13-rc3
v6.13-rc4
v6.13-rc5
v6.13-rc6
v6.13-rc7
v6.13.1
v6.13.2
v6.13.3
v6.13.4
v6.13.5
v6.13.6
v6.13.7
v6.14-rc1
v6.14-rc2
v6.14-rc3
v6.14-rc4
v6.14-rc5
Database specific
vanir_signatures
[
{
"signature_type": "Line",
"signature_version": "v1",
"id": "CVE-2025-21954-02bb2f85",
"digest": {
"line_hashes": [
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"164733683755522647016401831783561878141",
"41793890851632736233217621869756410816"
],
"threshold": 0.9
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@454825019d2f0c59e5174ece9e713f45ad80beff",
"deprecated": false,
"target": {
"file": "net/core/dev.c"
}
},
{
"signature_type": "Line",
"signature_version": "v1",
"id": "CVE-2025-21954-05e88214",
"digest": {
"line_hashes": [
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],
"threshold": 0.9
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@f3600c867c99a2cc8038680ecf211089c50e7971",
"deprecated": false,
"target": {
"file": "net/core/dev.c"
}
},
{
"signature_type": "Line",
"signature_version": "v1",
"id": "CVE-2025-21954-533c97cd",
"digest": {
"line_hashes": [
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],
"threshold": 0.9
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@1c17c8ced25c5fbe424c7ad7ea11d33014a986b1",
"deprecated": false,
"target": {
"file": "net/core/dev.c"
}
},
{
"signature_type": "Function",
"signature_version": "v1",
"id": "CVE-2025-21954-70f8e25b",
"digest": {
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"function_hash": "236525552869751509981783593279628451040"
},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@f3600c867c99a2cc8038680ecf211089c50e7971",
"deprecated": false,
"target": {
"function": "validate_xmit_skb",
"file": "net/core/dev.c"
}
},
{
"signature_type": "Function",
"signature_version": "v1",
"id": "CVE-2025-21954-8e41cef9",
"digest": {
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},
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@454825019d2f0c59e5174ece9e713f45ad80beff",
"deprecated": false,
"target": {
"function": "validate_xmit_skb",
"file": "net/core/dev.c"
}
},
{
"signature_type": "Function",
"signature_version": "v1",
"id": "CVE-2025-21954-e59f33f9",
"digest": {
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"function_hash": "236525552869751509981783593279628451040"
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"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@1c17c8ced25c5fbe424c7ad7ea11d33014a986b1",
"deprecated": false,
"target": {
"function": "validate_xmit_skb",
"file": "net/core/dev.c"
}
}
]