CVE-2025-39873 (GCVE-0-2025-39873)
Vulnerability from cvelistv5
Published
2025-09-23 06:00
Modified
2025-10-02 13:26
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
can: xilinx_can: xcan_write_frame(): fix use-after-free of transmitted SKB
can_put_echo_skb() takes ownership of the SKB and it may be freed
during or after the call.
However, xilinx_can xcan_write_frame() keeps using SKB after the call.
Fix that by only calling can_put_echo_skb() after the code is done
touching the SKB.
The tx_lock is held for the entire xcan_write_frame() execution and
also on the can_get_echo_skb() side so the order of operations does not
matter.
An earlier fix commit 3d3c817c3a40 ("can: xilinx_can: Fix usage of skb
memory") did not move the can_put_echo_skb() call far enough.
[mkl: add "commit" in front of sha1 in patch description]
[mkl: fix indention]
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| ▼ | Linux | Linux |
Version: 1598efe57b3e768056e4ca56cb9cf33111e68d1c Version: 1598efe57b3e768056e4ca56cb9cf33111e68d1c Version: 1598efe57b3e768056e4ca56cb9cf33111e68d1c Version: 1598efe57b3e768056e4ca56cb9cf33111e68d1c Version: 1598efe57b3e768056e4ca56cb9cf33111e68d1c Version: 1598efe57b3e768056e4ca56cb9cf33111e68d1c |
||||||
|
|||||||||
{
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"programFiles": [
"drivers/net/can/xilinx_can.c"
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"vendor": "Linux",
"versions": [
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{
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"version": "0",
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{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.194",
"versionType": "semver"
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{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.153",
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},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.107",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.48",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.16.*",
"status": "unaffected",
"version": "6.16.8",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.17",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
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"descriptions": [
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: xilinx_can: xcan_write_frame(): fix use-after-free of transmitted SKB\n\ncan_put_echo_skb() takes ownership of the SKB and it may be freed\nduring or after the call.\n\nHowever, xilinx_can xcan_write_frame() keeps using SKB after the call.\n\nFix that by only calling can_put_echo_skb() after the code is done\ntouching the SKB.\n\nThe tx_lock is held for the entire xcan_write_frame() execution and\nalso on the can_get_echo_skb() side so the order of operations does not\nmatter.\n\nAn earlier fix commit 3d3c817c3a40 (\"can: xilinx_can: Fix usage of skb\nmemory\") did not move the can_put_echo_skb() call far enough.\n\n[mkl: add \"commit\" in front of sha1 in patch description]\n[mkl: fix indention]"
}
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"providerMetadata": {
"dateUpdated": "2025-10-02T13:26:10.369Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"references": [
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"url": "https://git.kernel.org/stable/c/e202ffd9e54538ef67ec301ebd6d9da4823466c9"
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{
"url": "https://git.kernel.org/stable/c/1139321161a3ba5e45e61e0738b37f42f20bc57a"
},
{
"url": "https://git.kernel.org/stable/c/94b050726288a56a6b8ff55aa641f2fedbd3b44c"
},
{
"url": "https://git.kernel.org/stable/c/725b33deebd6e4c96fe7893f384510a54258f28f"
},
{
"url": "https://git.kernel.org/stable/c/668cc1e3bb21101d074e430de1b7ba8fd10189e7"
},
{
"url": "https://git.kernel.org/stable/c/ef79f00be72bd81d2e1e6f060d83cf7e425deee4"
}
],
"title": "can: xilinx_can: xcan_write_frame(): fix use-after-free of transmitted SKB",
"x_generator": {
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}
},
"cveMetadata": {
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"assignerShortName": "Linux",
"cveId": "CVE-2025-39873",
"datePublished": "2025-09-23T06:00:46.157Z",
"dateReserved": "2025-04-16T07:20:57.144Z",
"dateUpdated": "2025-10-02T13:26:10.369Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
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}