CVE-2022-49096

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Source
https://nvd.nist.gov/vuln/detail/CVE-2022-49096
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49096.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2022-49096
Downstream
Related
Published
2025-02-26T01:54:49Z
Modified
2025-10-21T09:12:19.613048Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
net: sfc: add missing xdp queue reinitialization
Details

In the Linux kernel, the following vulnerability has been resolved:

net: sfc: add missing xdp queue reinitialization

After rx/tx ring buffer size is changed, kernel panic occurs when it acts XDPTX or XDPREDIRECT.

When tx/rx ring buffer size is changed(ethtool -G), sfc driver reallocates and reinitializes rx and tx queues and their buffer (txqueue->buffer). But it misses reinitializing xdp queues(efx->xdptxqueues). So, while it is acting XDPTX or XDPREDIRECT, it uses the uninitialized txqueue->buffer.

A new function efxsetxdpchannels() is separated from efxset_channels() to handle only xdp queues.

Splat looks like: BUG: kernel NULL pointer dereference, address: 000000000000002a #PF: supervisor write access in kernel mode #PF: errorcode(0x0002) - not-present page PGD 0 P4D 0 Oops: 0002 [#4] PREEMPT SMP NOPTI RIP: 0010:efxtxmapchunk+0x54/0x90 [sfc] CPU: 2 PID: 0 Comm: swapper/2 Tainted: G D 5.17.0+ #55 e8beeee8289528f11357029357cf Code: 48 8b 8d a8 01 00 00 48 8d 14 52 4c 8d 2c d0 44 89 e0 48 85 c9 74 0e 44 89 e2 4c 89 f6 48 80 RSP: 0018:ffff92f121e45c60 EFLAGS: 00010297 RIP: 0010:efxtxmapchunk+0x54/0x90 [sfc] RAX: 0000000000000040 RBX: ffff92ea506895c0 RCX: ffffffffc0330870 RDX: 0000000000000001 RSI: 00000001139b10ce RDI: ffff92ea506895c0 RBP: ffffffffc0358a80 R08: 00000001139b110d R09: 0000000000000000 R10: 0000000000000001 R11: ffff92ea414c0088 R12: 0000000000000040 R13: 0000000000000018 R14: 00000001139b10ce R15: ffff92ea506895c0 FS: 0000000000000000(0000) GS:ffff92f121ec0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Code: 48 8b 8d a8 01 00 00 48 8d 14 52 4c 8d 2c d0 44 89 e0 48 85 c9 74 0e 44 89 e2 4c 89 f6 48 80 CR2: 000000000000002a CR3: 00000003e6810004 CR4: 00000000007706e0 RSP: 0018:ffff92f121e85c60 EFLAGS: 00010297 PKRU: 55555554 RAX: 0000000000000040 RBX: ffff92ea50689700 RCX: ffffffffc0330870 RDX: 0000000000000001 RSI: 00000001145a90ce RDI: ffff92ea50689700 RBP: ffffffffc0358a80 R08: 00000001145a910d R09: 0000000000000000 R10: 0000000000000001 R11: ffff92ea414c0088 R12: 0000000000000040 R13: 0000000000000018 R14: 00000001145a90ce R15: ffff92ea50689700 FS: 0000000000000000(0000) GS:ffff92f121e80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000000002a CR3: 00000003e6810005 CR4: 00000000007706e0 PKRU: 55555554 Call Trace: <IRQ> efxxdptxbuffers+0x12b/0x3d0 [sfc 84c94b8e32d44d296c17e10a634d3ad454de4ba5] _efxrxpacket+0x5c3/0x930 [sfc 84c94b8e32d44d296c17e10a634d3ad454de4ba5] efxrxpacket+0x28c/0x2e0 [sfc 84c94b8e32d44d296c17e10a634d3ad454de4ba5] efxef10evprocess+0x5f8/0xf40 [sfc 84c94b8e32d44d296c17e10a634d3ad454de4ba5] ? enqueuetaskfair+0x95/0x550 efx_poll+0xc4/0x360 [sfc 84c94b8e32d44d296c17e10a634d3ad454de4ba5]

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
Introduced
3990a8fffbdad5765f47ea593f9de66c91762059
Fixed
ed7a824fda8732578d1014fad1f7fb0363705090
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
3990a8fffbdad5765f47ea593f9de66c91762059
Fixed
b8c46bc358d84701e7f7ffa054037db25f25da0e
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
3990a8fffbdad5765f47ea593f9de66c91762059
Fixed
dcc85e1593686e42c6749ef3d356db34759d59e8
Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
3990a8fffbdad5765f47ea593f9de66c91762059
Fixed
059a47f1da93811d37533556d67e72f2261b1127

Affected versions

v5.*

v5.10
v5.10-rc1
v5.10-rc2
v5.10-rc3
v5.10-rc4
v5.10-rc5
v5.10-rc6
v5.10-rc7
v5.11
v5.11-rc1
v5.11-rc2
v5.11-rc3
v5.11-rc4
v5.11-rc5
v5.11-rc6
v5.11-rc7
v5.12
v5.12-rc1
v5.12-rc1-dontuse
v5.12-rc2
v5.12-rc3
v5.12-rc4
v5.12-rc5
v5.12-rc6
v5.12-rc7
v5.12-rc8
v5.13
v5.13-rc1
v5.13-rc2
v5.13-rc3
v5.13-rc4
v5.13-rc5
v5.13-rc6
v5.13-rc7
v5.14
v5.14-rc1
v5.14-rc2
v5.14-rc3
v5.14-rc4
v5.14-rc5
v5.14-rc6
v5.14-rc7
v5.15
v5.15-rc1
v5.15-rc2
v5.15-rc3
v5.15-rc4
v5.15-rc5
v5.15-rc6
v5.15-rc7
v5.15.1
v5.15.10
v5.15.11
v5.15.12
v5.15.13
v5.15.14
v5.15.15
v5.15.16
v5.15.17
v5.15.18
v5.15.19
v5.15.2
v5.15.20
v5.15.21
v5.15.22
v5.15.23
v5.15.24
v5.15.25
v5.15.26
v5.15.27
v5.15.28
v5.15.29
v5.15.3
v5.15.30
v5.15.31
v5.15.32
v5.15.33
v5.15.4
v5.15.5
v5.15.6
v5.15.7
v5.15.8
v5.15.9
v5.16
v5.16-rc1
v5.16-rc2
v5.16-rc3
v5.16-rc4
v5.16-rc5
v5.16-rc6
v5.16-rc7
v5.16-rc8
v5.16.1
v5.16.10
v5.16.11
v5.16.12
v5.16.13
v5.16.14
v5.16.15
v5.16.16
v5.16.17
v5.16.18
v5.16.19
v5.16.2
v5.16.3
v5.16.4
v5.16.5
v5.16.6
v5.16.7
v5.16.8
v5.16.9
v5.17
v5.17-rc1
v5.17-rc2
v5.17-rc3
v5.17-rc4
v5.17-rc5
v5.17-rc6
v5.17-rc7
v5.17-rc8
v5.17.1
v5.17.2
v5.4
v5.4-rc4
v5.4-rc5
v5.4-rc6
v5.4-rc7
v5.4-rc8
v5.5
v5.5-rc1
v5.5-rc2
v5.5-rc3
v5.5-rc4
v5.5-rc5
v5.5-rc6
v5.5-rc7
v5.6
v5.6-rc1
v5.6-rc2
v5.6-rc3
v5.6-rc4
v5.6-rc5
v5.6-rc6
v5.6-rc7
v5.7
v5.7-rc1
v5.7-rc2
v5.7-rc3
v5.7-rc4
v5.7-rc5
v5.7-rc6
v5.7-rc7
v5.8
v5.8-rc1
v5.8-rc2
v5.8-rc3
v5.8-rc4
v5.8-rc5
v5.8-rc6
v5.8-rc7
v5.9
v5.9-rc1
v5.9-rc2
v5.9-rc3
v5.9-rc4
v5.9-rc5
v5.9-rc6
v5.9-rc7
v5.9-rc8

Database specific

vanir_signatures

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        "id": "CVE-2022-49096-07e84f5e",
        "deprecated": false,
        "target": {
            "function": "efx_set_xdp_tx_queue",
            "file": "drivers/net/ethernet/sfc/efx_channels.c"
        },
        "signature_version": "v1",
        "signature_type": "Function",
        "digest": {
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    },
    {
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@ed7a824fda8732578d1014fad1f7fb0363705090",
        "id": "CVE-2022-49096-0fbb12c2",
        "deprecated": false,
        "target": {
            "function": "efx_realloc_channels",
            "file": "drivers/net/ethernet/sfc/efx_channels.c"
        },
        "signature_version": "v1",
        "signature_type": "Function",
        "digest": {
            "length": 2090.0,
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        }
    },
    {
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@b8c46bc358d84701e7f7ffa054037db25f25da0e",
        "id": "CVE-2022-49096-12174433",
        "deprecated": false,
        "target": {
            "function": "efx_set_xdp_tx_queue",
            "file": "drivers/net/ethernet/sfc/efx_channels.c"
        },
        "signature_version": "v1",
        "signature_type": "Function",
        "digest": {
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        }
    },
    {
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@059a47f1da93811d37533556d67e72f2261b1127",
        "id": "CVE-2022-49096-1d348e37",
        "deprecated": false,
        "target": {
            "function": "efx_realloc_channels",
            "file": "drivers/net/ethernet/sfc/efx_channels.c"
        },
        "signature_version": "v1",
        "signature_type": "Function",
        "digest": {
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        }
    },
    {
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@059a47f1da93811d37533556d67e72f2261b1127",
        "id": "CVE-2022-49096-2d2707e4",
        "deprecated": false,
        "target": {
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            "file": "drivers/net/ethernet/sfc/efx_channels.c"
        },
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        "signature_type": "Function",
        "digest": {
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        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@ed7a824fda8732578d1014fad1f7fb0363705090",
        "id": "CVE-2022-49096-40d7229b",
        "deprecated": false,
        "target": {
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            "file": "drivers/net/ethernet/sfc/efx_channels.c"
        },
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        "signature_type": "Function",
        "digest": {
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        }
    },
    {
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@dcc85e1593686e42c6749ef3d356db34759d59e8",
        "id": "CVE-2022-49096-58560e8b",
        "deprecated": false,
        "target": {
            "function": "efx_set_channels",
            "file": "drivers/net/ethernet/sfc/efx_channels.c"
        },
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        "digest": {
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        }
    },
    {
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@059a47f1da93811d37533556d67e72f2261b1127",
        "id": "CVE-2022-49096-6f8ba105",
        "deprecated": false,
        "target": {
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            "file": "drivers/net/ethernet/sfc/efx_channels.c"
        },
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        "signature_type": "Function",
        "digest": {
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        }
    },
    {
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@dcc85e1593686e42c6749ef3d356db34759d59e8",
        "id": "CVE-2022-49096-8dc3cf52",
        "deprecated": false,
        "target": {
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            "file": "drivers/net/ethernet/sfc/efx_channels.c"
        },
        "signature_version": "v1",
        "signature_type": "Function",
        "digest": {
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    },
    {
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@b8c46bc358d84701e7f7ffa054037db25f25da0e",
        "id": "CVE-2022-49096-9517d2e7",
        "deprecated": false,
        "target": {
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            "file": "drivers/net/ethernet/sfc/efx_channels.c"
        },
        "signature_version": "v1",
        "signature_type": "Function",
        "digest": {
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        "target": {
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            "file": "drivers/net/ethernet/sfc/efx_channels.c"
        },
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        "signature_type": "Function",
        "digest": {
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        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@dcc85e1593686e42c6749ef3d356db34759d59e8",
        "id": "CVE-2022-49096-9fed2d68",
        "deprecated": false,
        "target": {
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        },
        "signature_version": "v1",
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        "digest": {
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        "target": {
            "file": "drivers/net/ethernet/sfc/efx_channels.c"
        },
        "signature_version": "v1",
        "signature_type": "Line",
        "digest": {
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        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@ed7a824fda8732578d1014fad1f7fb0363705090",
        "id": "CVE-2022-49096-cd6d6876",
        "deprecated": false,
        "target": {
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            "file": "drivers/net/ethernet/sfc/efx_channels.c"
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        "signature_version": "v1",
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    },
    {
        "source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@b8c46bc358d84701e7f7ffa054037db25f25da0e",
        "id": "CVE-2022-49096-e7868a25",
        "deprecated": false,
        "target": {
            "file": "drivers/net/ethernet/sfc/efx_channels.c"
        },
        "signature_version": "v1",
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    }
]

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
5.5.0
Fixed
5.15.34
Type
ECOSYSTEM
Events
Introduced
5.16.0
Fixed
5.16.20
Type
ECOSYSTEM
Events
Introduced
5.17.0
Fixed
5.17.3