Уязвимость компонента ipv4 ядра операционной системы Linux, позволяющая нарушителю повысить свои привилегии и вызвать отказ в обслуживании

In the Linux kernel, the following vulnerability has been resolved: ipv4: account for fraggap on the paged allocation path In __ip_append_data(), when the paged-allocation branch is taken, alloclen and pagedlen are computed as alloclen = fragheaderlen + transhdrlen; pagedlen = datalen - transhdrlen; datalen already includes fraggap, but the fraggap bytes carried over from the previous skb are copied into the new skb's linear area at offset transhdrlen by the subsequent skb_copy_and_csum_bits(). The linear area is therefore undersized by fraggap bytes while pagedlen is overstated by the same amount. The non-paged branch sets alloclen to fraglen, which already accounts for fraggap because datalen does. Bring the paged branch in line by adding fraggap to alloclen and subtracting it from pagedlen. After this adjustment, copy no longer collapses to -fraggap on the paged path, so remove the stale comment describing that old arithmetic.

In the Linux kernel, the following vulnerability has been resolved: ipv4: account for fraggap on the paged allocation path In __ip_append_data(), when the paged-allocation branch is taken, alloclen and pagedlen are computed as alloclen = fragheaderlen + transhdrlen; pagedlen = datalen - transhdrlen; datalen already includes fraggap, but the fraggap bytes carried over from the previous skb are copied into the new skb's linear area at offset transhdrlen by the subsequent skb_copy_and_csum_bits(). The linear area is therefore undersized by fraggap bytes while pagedlen is overstated by the same amount. The non-paged branch sets alloclen to fraglen, which already accounts for fraggap because datalen does. Bring the paged branch in line by adding fraggap to alloclen and subtracting it from pagedlen. After this adjustment, copy no longer collapses to -fraggap on the paged path, so remove the stale comment describing that old arithmetic.

In the Linux kernel, the following vulnerability has been resolved: ipv4: account for fraggap on the paged allocation path In __ip_append_data(), when the paged-allocation branch is taken, alloclen and pagedlen are computed as alloclen = fragheaderlen + transhdrlen; pagedlen = datalen - transhdrlen; datalen already includes fraggap, but the fraggap bytes carried over from the previous skb are copied into the new skb's linear area at offset transhdrlen by the subsequent skb_copy_and_csum_bits(). The linear area is therefore undersized by fraggap bytes while pagedlen is overstated by the same amount. The non-paged branch sets alloclen to fraglen, which already accounts for fraggap because datalen does. Bring the paged branch in line by adding fraggap to alloclen and subtracting it from pagedlen. After this adjustment, copy no longer collapses to -fraggap on the paged path, so remove the stale comment describing that old arithmetic.

ipv4: account for fraggap on the paged allocation path

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

Security update for the Linux Kernel (Live Patch 18 for SUSE Linux Enterprise 15 SP7)

Security update for the Linux Kernel RT (Live Patch 17 for SUSE Linux Enterprise 15 SP7)

In the Linux kernel, the following vulnerability has been resolved: ipv4: account for fraggap on the paged allocation path In __ip_append_data(), when the paged-allocation branch is taken, alloclen and pagedlen are computed as alloclen = fragheaderlen + transhdrlen; pagedlen = datalen - transhdrlen; datalen already includes fraggap, but the fraggap bytes carried over from the previous skb are copied into the new skb's linear area at offset transhdrlen by the subsequent skb_copy_and_csum_bits(). The linear area is therefore undersized by fraggap bytes while pagedlen is overstated by the same amount. The non-paged branch sets alloclen to fraglen, which already accounts for fraggap because datalen does. Bring the paged branch in line by adding fraggap to alloclen and subtracting it from pagedlen. After this adjustment, copy no longer collapses to -fraggap on the paged path, so remove the stale comment describing that old arithmetic.

Security update for the Linux Kernel (Live Patch 15 for SUSE Linux Enterprise 15 SP7)

Security update for the Linux Kernel (Live Patch 16 for SUSE Linux Enterprise 15 SP7)

Security update for the Linux Kernel RT (Live Patch 16 for SUSE Linux Enterprise 15 SP7)

Security update for the Linux Kernel RT (Live Patch 15 for SUSE Linux Enterprise 15 SP7)

Security update for the Linux Kernel (Live Patch 26 for SUSE Linux Enterprise 15 SP6)

Security update for the Linux Kernel (Live Patch 6 for SUSE Linux Enterprise 15 SP7)

Security update for the Linux Kernel (Live Patch 3 for SUSE Linux Enterprise 15 SP7)

Security update for the Linux Kernel (Live Patch 5 for SUSE Linux Enterprise 15 SP7)

Security update for the Linux Kernel (Live Patch 9 for SUSE Linux Enterprise 15 SP7)

Security update for the Linux Kernel (Live Patch 12 for SUSE Linux Enterprise 15 SP7)

Security update for the Linux Kernel (Live Patch 14 for SUSE Linux Enterprise 15 SP7)