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Review reviewHigh

CVE-2022-48999

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: ipv4: Handle attempt to delete multipath route when fib_info contains an nh reference Gwangun Jung reported a slab-out-of-bounds access in fib_nh_match: fib_nh_match+0xf98/0x1130 linux-6.0-rc7/net/ipv4/fib_semantics.c:961 fib_table_delete+0x5f3/0xa40 linux-6.0-rc7/net/ipv4/fib_trie.c:1753 inet_rtm_delroute+0x2b3/0x380 linux-6.0-rc7/net/ipv4/fib_frontend.c:874 Separate nexthop objects are mutually exclusive with the legacy multipath spec. Fix fib_nh_match to return if the config for the to be deleted route contains a multipa...

CVSS
7.1
EPSS
0.26%
16.9% percentile
CISA KEV
Not listed
Published
2024.10.22
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.26%
Technical severityCVSS 7.1

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: ipv4: Handle attempt to delete multipath route when fib_info contains an nh reference Gwangun Jung reported a slab-out-of-bounds access in fib_nh_match: fib_nh_match+0xf98/0x1130 linux-6.0-rc7/net/ipv4/fib_semantics.c:961 fib_table_delete+0x5f3/0xa40 linux-6.0-rc7/net/ipv4/fib_trie.c:1753 inet_rtm_delroute+0x2b3/0x380 linux-6.0-rc7/net/ipv4/fib_frontend.c:874 Separate nexthop objects are mutually exclusive with the legacy multipath spec. Fix fib_nh_match to return if the config for the to be deleted route contains a multipa...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 493ced1ac47c48bb86d9d4e8e87df8592be85a0e < cc3cd130ecfb8b0ae52e235e487bae3f16a24a32, >= 493ced1ac47c48bb86d9d4e8e87df8592be85a0e < 0b5394229ebae09afc07aabccb5ffd705ffd250e, >= 493ced1ac47c48bb86d9d4e8e87df8592be85a0e < 25174d91e4a32a24204060d283bd5fa6d0ddf133, >= 493ced1ac47c48bb86d9d4e8e87df8592be85a0e < bb20a2ae241be846bc3c11ea4b3a3c69e41d51f2, >= 493ced1ac47c48bb86d9d4e8e87df8592be85a0e < 61b91eb33a69c3be11b259c5ea484505cd79f883, >= 5.3, >= 5.3 < 5.4.226, >= 5.5 < 5.10.158, >= 5.11 < 5.15.82, >= 5.16 < 6.0.12
Fixed versions
5.4.226, 5.10.158, 5.15.82, 6.0.12

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CWE
CWE-125
CVE-2022-48999 — Linux Linux, linux kernel | SECUFOCUS NOW