CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
Low
EPSS
Percentile
5.1%
In the Linux kernel, the following vulnerability has been resolved:
liquidio: Adjust a NULL pointer handling path in lio_vf_rep_copy_packet
In lio_vf_rep_copy_packet() pg_info->page is compared to a NULL value,
but then it is unconditionally passed to skb_add_rx_frag() which looks
strange and could lead to null pointer dereference.
lio_vf_rep_copy_packet() call trace looks like:
octeon_droq_process_packets
octeon_droq_fast_process_packets
octeon_droq_dispatch_pkt
octeon_create_recv_info
…search in the dispatch_list…
->disp_fn(rdisp->rinfo, …)
lio_vf_rep_pkt_recv(struct octeon_recv_info *recv_info, …)
In this path there is no code which sets pg_info->page to NULL.
So this check looks unneeded and doesn’t solve potential problem.
But I guess the author had reason to add a check and I have no such card
and can’t do real test.
In addition, the code in the function liquidio_push_packet() in
liquidio/lio_core.c does exactly the same.
Based on this, I consider the most acceptable compromise solution to
adjust this issue by moving skb_add_rx_frag() into conditional scope.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Vendor | Product | Version | CPE |
---|---|---|---|
linux | linux_kernel | * | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
linux | linux_kernel | 6.10 | cpe:2.3:o:linux:linux_kernel:6.10:rc1:*:*:*:*:*:* |
linux | linux_kernel | 6.10 | cpe:2.3:o:linux:linux_kernel:6.10:rc2:*:*:*:*:*:* |
linux | linux_kernel | 6.10 | cpe:2.3:o:linux:linux_kernel:6.10:rc3:*:*:*:*:*:* |
[
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/net/ethernet/cavium/liquidio/lio_vf_rep.c"
],
"versions": [
{
"version": "1f233f327913",
"lessThan": "87d6bdc006f0",
"status": "affected",
"versionType": "git"
},
{
"version": "1f233f327913",
"lessThan": "dcc7440f32c7",
"status": "affected",
"versionType": "git"
},
{
"version": "1f233f327913",
"lessThan": "cbf18d8128a7",
"status": "affected",
"versionType": "git"
},
{
"version": "1f233f327913",
"lessThan": "a86490a3712c",
"status": "affected",
"versionType": "git"
},
{
"version": "1f233f327913",
"lessThan": "f1ab15a09492",
"status": "affected",
"versionType": "git"
},
{
"version": "1f233f327913",
"lessThan": "fd2b613bc4c5",
"status": "affected",
"versionType": "git"
},
{
"version": "1f233f327913",
"lessThan": "a6f4d0ec170a",
"status": "affected",
"versionType": "git"
},
{
"version": "1f233f327913",
"lessThan": "c44711b78608",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/net/ethernet/cavium/liquidio/lio_vf_rep.c"
],
"versions": [
{
"version": "4.15",
"status": "affected"
},
{
"version": "0",
"lessThan": "4.15",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "4.19.317",
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.4.279",
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.10.221",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.15.162",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.1.95",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.6.35",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.9.6",
"lessThanOrEqual": "6.9.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.10",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
]
git.kernel.org/stable/c/87d6bdc006f0cbf297a3b2ad6e40ede4c3ee5dc2
git.kernel.org/stable/c/a6f4d0ec170a46b5f453cacf55dff5989b42bbfa
git.kernel.org/stable/c/a86490a3712cc513113440a606a0e77130abd47c
git.kernel.org/stable/c/c44711b78608c98a3e6b49ce91678cd0917d5349
git.kernel.org/stable/c/cbf18d8128a753cb632bef39470d19befd9c7347
git.kernel.org/stable/c/dcc7440f32c7a26b067aff6e7d931ec593024a79
git.kernel.org/stable/c/f1ab15a09492a5ae8ab1e2c35ba2cf9e150d25ee
git.kernel.org/stable/c/fd2b613bc4c508e55c1221c6595bb889812a4fea