netlink: Fix kernel-infoleak-after-free in __skb_datagram_iter
In the Linux kernel, the following vulnerability has been resolved: netlink: Fix kernel-infoleak-after-free in __skb_datagram_iter syzbot reported the following uninit-value access issue [1]: netlink_to_full_skb() creates a new `skb` and puts the `skb->data` passed as a 1st arg of netlink_to_full_skb() onto new `skb`. The data size is specified as `len` and passed to skb_put_data(). This `len` is based on `skb->end` that is not data offset but buffer offset. The `skb->end` contains data and tailroom. Since the tailroom is not initialized when the new `skb` created, KMSAN detects uninitialized memory area when copying the data. This patch resolved this issue by correct the len from `skb->end` to `skb->len`, which is the actual data offset. BUG: KMSAN: kernel-infoleak-after-free in instrument_copy_to_user include/linux/instrumented.h:114 [inline] BUG: KMSAN: kernel-infoleak-after-free in copy_to_user_iter lib/iov_iter.c:24 [inline] BUG: KMSAN: kernel-infoleak-after-free in iterate_ubuf include/linux/iov_iter.h:29 [inline] BUG: KMSAN: kernel-infoleak-after-free in iterate_and_advance2 include/linux/iov_iter.h:245 [inline] BUG: KMSAN: kernel-infoleak-after-free in iterate_and_advance include/linux/iov_iter.h:271 [inline] BUG: KMSAN: kernel-infoleak-after-free in _copy_to_iter+0x364/0x2520 lib/iov_iter.c:186 instrument_copy_to_user include/linux/instrumented.h:114 [inline] copy_to_user_iter lib/iov_iter.c:24 [inline] iterate_ubuf include/linux/iov_iter.h:29 [inline] iterate_and_ad
CVE-2024-26805
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2024-26805
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "1853c949646005b5959c483becde86608f548f24",
"lessThan": "ec343a55b687a452f5e87f3b52bf9f155864df65",
"versionType": "git"
},
{
"status": "affected",
"version": "1853c949646005b5959c483becde86608f548f24",
"lessThan": "9ae51361da43270f4ba0eb924427a07e87e48777",
"versionType": "git"
},
{
"status": "affected",
"version": "1853c949646005b5959c483becde86608f548f24",
"lessThan": "f19d1f98e60e68b11fc60839105dd02a30ec0d77",
"versionType": "git"
},
{
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"lessThan": "c71ed29d15b1a1ed6c464f8c3536996963046285",
"versionType": "git"
},
{
"status": "affected",
"version": "1853c949646005b5959c483becde86608f548f24",
"lessThan": "0b27bf4c494d61e5663baa34c3edd7ccebf0ea44",
"versionType": "git"
},
{
"status": "affected",
"version": "1853c949646005b5959c483becde86608f548f24",
"lessThan": "d3ada42e534a83b618bbc1e490d23bf0fdae4736",
"versionType": "git"
},
{
"status": "affected",
"version": "1853c949646005b5959c483becde86608f548f24",
"lessThan": "59fc3e3d049e39e7d0d271f20dd5fb47c57faf1d",
"versionType": "git"
},
{
"status": "affected",
"version": "1853c949646005b5959c483becde86608f548f24",
"lessThan": "661779e1fcafe1b74b3f3fe8e980c1e207fea1fd",
"versionType": "git"
},
{
"status": "affected",
"version": "92994a5f49d0a81c8643452d5c0a6e8b31d85a61",
"versionType": "git"
},
{
"status": "affected",
"version": "85aec6328f3346b0718211faad564a3ffa64f60e",
"versionType": "git"
},
{
"status": "affected",
"version": "d38200098e3203ba30ba06ed3f345ec6ca75234c",
"versionType": "git"
},
{
"status": "affected",
"version": "65d48c630ff80a19c39751a4a6d3315f4c3c0280",
"versionType": "git"
},
{
"status": "affected",
"version": "62f43b58d2b2c4f0200b9ca2b997f4c484f0272f",
"versionType": "git"
},
{
"status": "affected",
"version": "3.12.49",
"lessThan": "3.13",
"versionType": "semver"
},
{
"status": "affected",
"version": "3.14.54",
"lessThan": "3.15",
"versionType": "semver"
},
{
"status": "affected",
"version": "3.18.23",
"lessThan": "3.19",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.1.10",
"lessThan": "4.2",
"versionType": "semver"
},
{
"status": "affected",
"version": "4.2.3",
"lessThan": "4.3",
"versionType": "semver"
}
],
"programFiles": [
"net/netlink/af_netlink.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.3"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.3",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "4.19.309",
"versionType": "semver",
"lessThanOrEqual": "4.19.*"
},
{
"status": "unaffected",
"version": "5.4.271",
"versionType": "semver",
"lessThanOrEqual": "5.4.*"
},
{
"status": "unaffected",
"version": "5.10.212",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.151",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.81",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.21",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.7.9",
"versionType": "semver",
"lessThanOrEqual": "6.7.*"
},
{
"status": "unaffected",
"version": "6.8",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/netlink/af_netlink.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2024-26805
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #26426 · Revision 1
- Added to Heist Feed
- Publisher date