Linux hwe edge: In the Linux kernel, the following vulnerability has been resolved: eth: bnxt: fix truesize for mb-xdp-pass case When mb-xdp is set and return is… (CVE-2025-21961)
In the Linux kernel, the following vulnerability has been resolved: eth: bnxt: fix truesize for mb-xdp-pass case When mb-xdp is set and return is XDP_PASS, packet is converted from xdp_buff to sk_buff with xdp_update_skb_shared_info() in bnxt_xdp_build_skb(). bnxt_xdp_build_skb() passes incorrect truesize argument to xdp_update_skb_shared_info(). The truesize is calculated as BNXT_RX_PAGE_SIZE * sinfo->nr_frags but the skb_shared_info was wiped by napi_build_skb() before. So it stores sinfo->nr_frags before bnxt_xdp_build_skb() and use it instead of getting skb_shared_info from xdp_get_shared_info_from_buff(). Splat looks like: ------------[ cut here ]------------ WARNING: CPU: 2 PID: 0 at net/core/skbuff.c:6072 skb_try_coalesce+0x504/0x590 Modules linked in: xt_nat xt_tcpudp veth af_packet xt_conntrack nft_chain_nat xt_MASQUERADE nf_conntrack_netlink xfrm_user xt_addrtype nft_coms CPU: 2 UID: 0 PID: 0 Comm: swapper/2 Not tainted 6.14.0-rc2+ #3 RIP: 0010:skb_try_coalesce+0x504/0x590 Code: 4b fd ff ff 49 8b 34 24 40 80 e6 40 0f 84 3d fd ff ff 49 8b 74 24 48 40 f6 c6 01 0f 84 2e fd ff ff 48 8d 4e ff e9 25 fd ff ff <0f> 0b e99 RSP: 0018:ffffb62c4120caa8 EFLAGS: 00010287 RAX: 0000000000000003 RBX: ffffb62c4120cb14 RCX: 0000000000000ec0 RDX: 0000000000001000 RSI: ffffa06e5d7dc000 RDI: 0000000000000003 RBP: ffffa06e5d7ddec0 R08: ffffa06e6120a800 R09: ffffa06e7a119900 R10: 0000000000002310 R11: ffffa06e5d7dcec0 R12: ffffe4360575f740 R13: ffffe43600000000 R14: 0000000000000002 R15: 0000000000000002 FS: 0000000000000000(0000) GS:ffffa0755f700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f147b76b0f8 CR3: 00000001615d4000 CR4: 00000000007506f0 PKRU: 55555554 Call Trace: <IRQ> ? __warn+0x84/0x130 ? skb_try_coalesce+0x504/0x590 ? report_bug+0x18a/0x1a0 ? handle_bug+0x53/0x90 ? exc_invalid_op+0x14/0x70 ? asm_exc_invalid_op+0x16/0x20 ? skb_try_coalesce+0x504/0x590 inet_frag_reasm_finish+0x11f/0x2e0 ip_defrag+0x37a/0x900 ip_local_deliver+0x51/0x120 ip_sublist_rcv_finish+0x64/0x70 ip_sublist_rcv+0x179/0x210 ip_list_rcv+0xf9/0x130 How to reproduce: <Node A> ip link set $interface1 xdp obj xdp_pass.o ip link set $interface1 mtu 9000 up ip a a 10.0.0.1/24 dev $interface1 <Node B> ip link set $interfac2 mtu 9000 up ip a a 10.0.0.2/24 dev $interface2 ping 10.0.0.1 -s 65000 Following ping.py patch adds xdp-mb-pass case. so ping.py is going to be able to reproduce this issue.
AI Analysis
Technical Summary
This Red Hat security advisory (RHSA-2025:9080) covers seven distinct vulnerabilities in the Linux kernel affecting Red Hat Enterprise Linux 9 and its variants. The fixes address: a truesize calculation error in the bnxt Ethernet driver (CVE-2025-21961), a slab-use-after-free in Bluetooth L2CAP command sending (CVE-2025-21969), an integer overflow in CIFS mount option processing (CVE-2025-21963), a use-after-free in WiFi cfg80211 wiphy handling (CVE-2025-21979), a use-after-free in proc_get_inode() (CVE-2025-21999), a use-after-free in md device iteration (CVE-2025-22126), and a use-after-free in SMB client decryption with multichannel (CVE-2025-37750). Red Hat rates the overall security impact as Important (high). The advisory provides updated kernel packages and requires a system reboot to apply the fixes. No CVSS scores are provided in the advisory; users are directed to individual CVE pages for details.
Potential Impact
The vulnerabilities fixed in this advisory include multiple use-after-free conditions and an integer overflow, which could lead to memory corruption or denial of service in the kernel. These issues affect core kernel components responsible for networking (Ethernet, Bluetooth, WiFi, SMB, CIFS) and system internals (proc filesystem, MD devices). Exploitation could potentially impact system stability or security, depending on the vulnerability. Red Hat classifies the overall impact as Important (high severity). There are no known exploits in the wild at the time of the advisory.
Mitigation Recommendations
Red Hat has released updated kernel packages that address these vulnerabilities. Users of Red Hat Enterprise Linux 9 and related variants should apply the kernel update provided in advisory RHSA-2025:9080 as soon as possible. A system reboot is required for the update to take effect. Refer to the official Red Hat article https://access.redhat.com/articles/11258 for detailed update instructions. Patch status is confirmed as available and official.
Linux hwe edge: In the Linux kernel, the following vulnerability has been resolved: eth: bnxt: fix truesize for mb-xdp-pass case When mb-xdp is set and return is… (CVE-2025-21961)
Description
In the Linux kernel, the following vulnerability has been resolved: eth: bnxt: fix truesize for mb-xdp-pass case When mb-xdp is set and return is XDP_PASS, packet is converted from xdp_buff to sk_buff with xdp_update_skb_shared_info() in bnxt_xdp_build_skb(). bnxt_xdp_build_skb() passes incorrect truesize argument to xdp_update_skb_shared_info(). The truesize is calculated as BNXT_RX_PAGE_SIZE * sinfo->nr_frags but the skb_shared_info was wiped by napi_build_skb() before. So it stores sinfo->nr_frags before bnxt_xdp_build_skb() and use it instead of getting skb_shared_info from xdp_get_shared_info_from_buff(). Splat looks like: ------------[ cut here ]------------ WARNING: CPU: 2 PID: 0 at net/core/skbuff.c:6072 skb_try_coalesce+0x504/0x590 Modules linked in: xt_nat xt_tcpudp veth af_packet xt_conntrack nft_chain_nat xt_MASQUERADE nf_conntrack_netlink xfrm_user xt_addrtype nft_coms CPU: 2 UID: 0 PID: 0 Comm: swapper/2 Not tainted 6.14.0-rc2+ #3 RIP: 0010:skb_try_coalesce+0x504/0x590 Code: 4b fd ff ff 49 8b 34 24 40 80 e6 40 0f 84 3d fd ff ff 49 8b 74 24 48 40 f6 c6 01 0f 84 2e fd ff ff 48 8d 4e ff e9 25 fd ff ff <0f> 0b e99 RSP: 0018:ffffb62c4120caa8 EFLAGS: 00010287 RAX: 0000000000000003 RBX: ffffb62c4120cb14 RCX: 0000000000000ec0 RDX: 0000000000001000 RSI: ffffa06e5d7dc000 RDI: 0000000000000003 RBP: ffffa06e5d7ddec0 R08: ffffa06e6120a800 R09: ffffa06e7a119900 R10: 0000000000002310 R11: ffffa06e5d7dcec0 R12: ffffe4360575f740 R13: ffffe43600000000 R14: 0000000000000002 R15: 0000000000000002 FS: 0000000000000000(0000) GS:ffffa0755f700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f147b76b0f8 CR3: 00000001615d4000 CR4: 00000000007506f0 PKRU: 55555554 Call Trace: <IRQ> ? __warn+0x84/0x130 ? skb_try_coalesce+0x504/0x590 ? report_bug+0x18a/0x1a0 ? handle_bug+0x53/0x90 ? exc_invalid_op+0x14/0x70 ? asm_exc_invalid_op+0x16/0x20 ? skb_try_coalesce+0x504/0x590 inet_frag_reasm_finish+0x11f/0x2e0 ip_defrag+0x37a/0x900 ip_local_deliver+0x51/0x120 ip_sublist_rcv_finish+0x64/0x70 ip_sublist_rcv+0x179/0x210 ip_list_rcv+0xf9/0x130 How to reproduce: <Node A> ip link set $interface1 xdp obj xdp_pass.o ip link set $interface1 mtu 9000 up ip a a 10.0.0.1/24 dev $interface1 <Node B> ip link set $interfac2 mtu 9000 up ip a a 10.0.0.2/24 dev $interface2 ping 10.0.0.1 -s 65000 Following ping.py patch adds xdp-mb-pass case. so ping.py is going to be able to reproduce this issue.
CVSS v3.1
Score 7.5high
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This Red Hat security advisory (RHSA-2025:9080) covers seven distinct vulnerabilities in the Linux kernel affecting Red Hat Enterprise Linux 9 and its variants. The fixes address: a truesize calculation error in the bnxt Ethernet driver (CVE-2025-21961), a slab-use-after-free in Bluetooth L2CAP command sending (CVE-2025-21969), an integer overflow in CIFS mount option processing (CVE-2025-21963), a use-after-free in WiFi cfg80211 wiphy handling (CVE-2025-21979), a use-after-free in proc_get_inode() (CVE-2025-21999), a use-after-free in md device iteration (CVE-2025-22126), and a use-after-free in SMB client decryption with multichannel (CVE-2025-37750). Red Hat rates the overall security impact as Important (high). The advisory provides updated kernel packages and requires a system reboot to apply the fixes. No CVSS scores are provided in the advisory; users are directed to individual CVE pages for details.
Potential Impact
The vulnerabilities fixed in this advisory include multiple use-after-free conditions and an integer overflow, which could lead to memory corruption or denial of service in the kernel. These issues affect core kernel components responsible for networking (Ethernet, Bluetooth, WiFi, SMB, CIFS) and system internals (proc filesystem, MD devices). Exploitation could potentially impact system stability or security, depending on the vulnerability. Red Hat classifies the overall impact as Important (high severity). There are no known exploits in the wild at the time of the advisory.
Mitigation Recommendations
Red Hat has released updated kernel packages that address these vulnerabilities. Users of Red Hat Enterprise Linux 9 and related variants should apply the kernel update provided in advisory RHSA-2025:9080 as soon as possible. A system reboot is required for the update to take effect. Refer to the official Red Hat article https://access.redhat.com/articles/11258 for detailed update instructions. Patch status is confirmed as available and official.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2025:9080
- Cve Count
- 7
- Additional Cves
- ["CVE-2025-21963","CVE-2025-21969","CVE-2025-21979","CVE-2025-21999","CVE-2025-22126","CVE-2025-37750"]
- Cvss Version
- null
Threat ID: 6a160985e29bf47b50651e41
Added to database: 05/26/2026, 20:58:45 UTC
Last enriched: 06/26/2026, 01:23:58 UTC
Last updated: 08/18/2026, 10:54:19 UTC
Views: 151
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