CVE-2022-50365

skbuff: Account for tail adjustment during pull operations

State: Published
Severity: 7.5 High
Published: Sep 17, 2025
Updated: Aug 5, 2026
Reserved: Sep 17, 2025

Description

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

skbuff: Account for tail adjustment during pull operations

Extending the tail can have some unexpected side effects if a program uses a helper like BPF_FUNC_skb_pull_data to read partial content beyond the head skb headlen when all the skbs in the gso frag_list are linear with no head_frag -

kernel BUG at net/core/skbuff.c:4219! pc : skb_segment+0xcf4/0xd2c lr : skb_segment+0x63c/0xd2c Call trace: skb_segment+0xcf4/0xd2c __udp_gso_segment+0xa4/0x544 udp4_ufo_fragment+0x184/0x1c0 inet_gso_segment+0x16c/0x3a4 skb_mac_gso_segment+0xd4/0x1b0 __skb_gso_segment+0xcc/0x12c udp_rcv_segment+0x54/0x16c udp_queue_rcv_skb+0x78/0x144 udp_unicast_rcv_skb+0x8c/0xa4 __udp4_lib_rcv+0x490/0x68c udp_rcv+0x20/0x30 ip_protocol_deliver_rcu+0x1b0/0x33c ip_local_deliver+0xd8/0x1f0 ip_rcv+0x98/0x1a4 deliver_ptype_list_skb+0x98/0x1ec __netif_receive_skb_core+0x978/0xc60

Fix this by marking these skbs as GSO_DODGY so segmentation can handle the tail updates accordingly.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	Linux
3.1	5.5 Medium	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	162a5a8c3aff15c449e6b38355cdf80ab4f77a5a to before ff3743d00f41d803e6ab9334962b674f3b7fd0cbAffected 55fb612bef7fd237fb70068e2b6ff1cd1543a8ef to before 6ac417d71b80e74b002313fcd73f7e9008e8e457Affected 821302dd0c51d29269ef73a595bdff294419e2cd to before 2d59f0ca153e9573ec4f140988c0ccca0eb4181bAffected 3dcbdb134f329842a38f0e6797191b885ab00a00 to before 668dc454bcbd1da73605201ff43f988c70848215Affected 3dcbdb134f329842a38f0e6797191b885ab00a00 to before 821be5a5ab09a40ba09cb5ba354f18cf7996fea0Affected 3dcbdb134f329842a38f0e6797191b885ab00a00 to before 8fb773eed4909ef5dc1bbeb3629a337d3336df7eAffected 3dcbdb134f329842a38f0e6797191b885ab00a00 to before 946dd5dc4fcc4123cdfe3942b20012c4448cf89aAffected 3dcbdb134f329842a38f0e6797191b885ab00a00 to before 331615d837f4979eb91a336a223a5c7f7886ecd5Affected 3dcbdb134f329842a38f0e6797191b885ab00a00 to before 2d7afdcbc9d32423f177ee12b7c93783aea338fbAffected 92984818ff8cfd97311a5e0ac27f148a00df2b54Affected 4.9.194 to before 4.9.337Affected 4.14.145 to before 4.14.303Affected 4.19.74 to before 4.19.270Affected 5.2.16 to before 5.3Affected
LinuxLinux	5.3Affected before 5.3Not affected 4.9.337 through 4.9.Not affected 4.14.303 through 4.14.Not affected 4.19.270 through 4.19.Not affected 5.4.229 through 5.4.Not affected 5.10.163 through 5.10.Not affected 5.15.86 through 5.15.Not affected 6.0.16 through 6.0.Not affected 6.1.2 through 6.1.Not affected 6.2 and laterNot affected

Product

Versions

LinuxLinux

162a5a8c3aff15c449e6b38355cdf80ab4f77a5a to before ff3743d00f41d803e6ab9334962b674f3b7fd0cbAffected
55fb612bef7fd237fb70068e2b6ff1cd1543a8ef to before 6ac417d71b80e74b002313fcd73f7e9008e8e457Affected
821302dd0c51d29269ef73a595bdff294419e2cd to before 2d59f0ca153e9573ec4f140988c0ccca0eb4181bAffected
3dcbdb134f329842a38f0e6797191b885ab00a00 to before 668dc454bcbd1da73605201ff43f988c70848215Affected
3dcbdb134f329842a38f0e6797191b885ab00a00 to before 821be5a5ab09a40ba09cb5ba354f18cf7996fea0Affected
3dcbdb134f329842a38f0e6797191b885ab00a00 to before 8fb773eed4909ef5dc1bbeb3629a337d3336df7eAffected
3dcbdb134f329842a38f0e6797191b885ab00a00 to before 946dd5dc4fcc4123cdfe3942b20012c4448cf89aAffected
3dcbdb134f329842a38f0e6797191b885ab00a00 to before 331615d837f4979eb91a336a223a5c7f7886ecd5Affected
3dcbdb134f329842a38f0e6797191b885ab00a00 to before 2d7afdcbc9d32423f177ee12b7c93783aea338fbAffected
92984818ff8cfd97311a5e0ac27f148a00df2b54Affected
4.9.194 to before 4.9.337Affected
4.14.145 to before 4.14.303Affected
4.19.74 to before 4.19.270Affected
5.2.16 to before 5.3Affected

LinuxLinux

5.3Affected
before 5.3Not affected
4.9.337 through 4.9.*Not affected
4.14.303 through 4.14.*Not affected
4.19.270 through 4.19.*Not affected
5.4.229 through 5.4.*Not affected
5.10.163 through 5.10.*Not affected
5.15.86 through 5.15.*Not affected
6.0.16 through 6.0.*Not affected
6.1.2 through 6.1.*Not affected
6.2 and laterNot affected

References

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